{"title":"MerCruiser Manifold \u0026 Elbow Gaskets","description":null,"products":[{"product_id":"27-99777-2-open-exhaust-elbow-gasket-for-mercruiser-120-140-2-5l-3-0l","title":"27-99777-2 Open Exhaust Elbow Gasket for MerCruiser 120 140 2.5L 3.0L","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eRear-Riser Open Exhaust Manifold-to-Elbow Gasket\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis rear-riser open gasket services the exhaust manifold-to-elbow or adaptor joint on applicable MerCruiser 4-cylinder, 6-cylinder, and V8 engines, including 120, 140, 2.5L, 3.0L, and 3.0LX series applications. It corresponds to primary OEM reference 27-99777-2 and is distinct from the closed-cooling gasket configuration referenced as MerCruiser 27-92720 \/ GLM 32630.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eEngine model alone is not sufficient to distinguish between open and closed-cooling gasket versions; match your engine model, production year, and existing rear-riser open-gasket configuration at the exhaust manifold-to-elbow or adaptor joint before ordering.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4-Cyl. \u0026amp; 6-Cyl. (except 120hp)\u003c\/strong\u003e — Years: 1968–1982. Joint location: Exhaust manifold to elbow or adaptor. Configuration: Rear-riser open gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser All V8\u003c\/strong\u003e — Years: 1978–1982. Joint location: Exhaust manifold to elbow or adaptor. Configuration: Rear-riser open gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 140\u003c\/strong\u003e — Engine configuration: Inline 4, GM 181 CID, 4-Cyl. Years: 1968–1982. Joint location: Exhaust manifold to elbow or adaptor. Configuration: Rear-riser open gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 120 \/ 140\u003c\/strong\u003e — Engine configuration: Inline 4, 153 \/ 181 CID, 4-Cyl. Years: 1982–1995. Joint location: Exhaust manifold to elbow or adaptor. Configuration: Rear-riser open gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 2.5L\u003c\/strong\u003e — Years: 1983–1994. Joint location: Exhaust manifold to elbow or adaptor. Configuration: Rear-riser open gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.0L\u003c\/strong\u003e — Years: 1983–1994. Joint location: Exhaust manifold to elbow or adaptor. Configuration: Rear-riser open gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 3.0LX \/ 3.0L\u003c\/strong\u003e — Engine configuration: Inline 4, GM 181 CID, 4-Cyl. Years: 1990 \u0026amp; up. Joint location: Exhaust manifold to elbow or adaptor. Configuration: Rear-riser open gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:10px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 120hp (1968–1982)\u003c\/strong\u003e — Excluded from the 1968–1982 4\/6-Cyl. application range.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:10px 0 0;\"\u003e\n \u003cstrong\u003eClosed-Cooling Gasket Applications (MerCruiser 27-92720 \/ GLM 32630)\u003c\/strong\u003e — This listing is the open rear-riser gasket version, not the closed-cooling gasket configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not alone guarantee interchangeability across different gasket configurations or indicate manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99777-2, 27-997772, 27-99777Q02, 99777Q02, 997771, 99777B2, 27-997771, 27-99777B2, 27-52076, 52076\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMercury Mariner Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99777\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508615\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Reference (GLM)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM31520, 31520\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Reference (Sierra)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-2833, 18-2833-9\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Reference (RECMAR)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eREC27-99777Q02\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDifferent Configuration (Not This Part)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser 27-92720, GLM 32630 (Closed-cooling gasket version)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eRear-riser open exhaust manifold-to-elbow gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is shut off, completely cool, and secured against accidental starting before servicing any exhaust joint.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow or adaptor during disassembly to prevent strain on connected exhaust hoses or mounting hardware.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean the mating surfaces on both the exhaust manifold and the elbow or adaptor thoroughly, taking care not to gouge or damage the sealing faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the port openings of the new rear-riser open gasket directly against the joint passages to verify that it matches the required open-gasket configuration; never substitute an open gasket where a closed-cooling gasket is specified.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eReassemble the joint and tighten fasteners according to the sequence and specifications in your engine service manual, then inspect the joint during initial operation and stop the engine immediately if any exhaust or water leak is detected.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow do I distinguish this gasket from the closed-cooling version?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis part is the rear-riser open gasket for the exhaust manifold-to-elbow or adaptor joint, identified by references such as MerCruiser 27-99777-2, 27-99777Q02, and GLM 31520. The closed-cooling alternative uses a different design and is referenced under MerCruiser 27-92720 or GLM 32630.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this gasket fit all MerCruiser 120hp inline 4-cylinder engines?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. For 1968–1982 4-cylinder and 6-cylinder applications, the 120hp model is specifically excluded. However, it is listed for Model 120 \/ 140 inline 4-cylinder (153 \/ 181 CID) engines from 1982–1995 when equipped with the rear-riser open-gasket configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165060292659,"sku":"24GK061","price":10.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-cccb8e34afc43da2.webp?v=1792733857"},{"product_id":"27-863724q-restrictor-exhaust-elbow-riser-gasket-for-mercruiser-v6-v8","title":"27-863724Q Restrictor Exhaust Elbow Riser Gasket for MerCruiser V6 V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold Elbow Riser Gasket for MerCruiser Raw-Water-Cooled Restrictor Joints\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis individual exhaust manifold-to-elbow\/riser gasket (referenced to MerCruiser 27-863724Q and restrictor references such as 27-860233 and Sierra 18-0897) is for raw-water-cooled manifold joints on specified MerCruiser GM V6, small-block V8, and big-block V8 stern drive applications. It fits listed wet-joint systems within the specified year and 0M serial-number boundaries, as well as the raw-water gasket position in compatible GM V6\/V8 small-block Dry Joint “Alternative” systems (0M serial numbers and up), and is not a complete manifold gasket kit or a universal original dry-joint gasket.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Location\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold to elbow \/ riser joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRaw water cooling\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFlow Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRestricted (Restrictor) gasket version associated with MerCruiser 27-860233, GLM 30240, and Sierra 18-0897; open and closed-cooling versions are separately listed parts\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint Types\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet Joint (on specified V6, V8 S.B., and V8 B.B. models) and Dry Joint “Alternative” raw-water gasket position (on specified GM V6\/V8 S.B. models, 0M serial numbers \u0026amp; up)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket services specified MerCruiser Stern Drive raw-water-cooled exhaust joints across the GM V6, small-block V8, and big-block V8 families listed below. Verify whether your manifold-to-elbow joint requires a restricted (restrictor), open, or closed-cooling gasket and match your engine model, displacement, joint design, and serial-number generation before ordering.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern Drive MODEL 175-205 — V6, GM 229\/262 CID\u003c\/strong\u003e — Years \/ Serial Numbers: 1983 - 0M SN#’s. Exhaust Configuration: Wet Joint, raw water cooling, restricted elbow\/riser gasket position.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern Drive MODEL 200-320 — V8 S.B. (Small Block), GM 305\/350\/377 CID\u003c\/strong\u003e — Years \/ Serial Numbers: 1983 - 0M SN#’s. Exhaust Configuration: Wet Joint, raw water cooling, restricted elbow\/riser gasket position.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern Drive MODEL 330-370 — V8 B.B. (Big Block), GM 454\/502 CID\u003c\/strong\u003e — Years: 1981 \u0026amp; UP. Exhaust Configuration: Wet Joint, raw water cooling, restricted elbow\/riser gasket position.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern Drive GM V6 \/ V8 S.B. (Small Block) Dry Joint “Alternative”\u003c\/strong\u003e — Serial Numbers: 0M SN#’s \u0026amp; UP. Exhaust Configuration: Raw-water gasket position in a compatible Dry Joint “Alternative” exhaust system (do not treat as a universal original dry-joint gasket).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern Drive 350 MAG, 454 MAG, 502 MAG \u0026amp; 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 8.2L\u003c\/strong\u003e — Applicable only when equipped with the matching raw-water-cooled Wet Joint or GM V6\/V8 S.B. Dry Joint “Alternative” exhaust system and within the corresponding engine family, year, and serial-number limits listed above.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThese numbers are provided as identification references for part lookup and do not by themselves guarantee universal interchangeability or indicate the manufacturer of this aftermarket part.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-863724Q, 27-863724, 27-860233, 27-41813, 41813, 863724B, 863724Q, 863724\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC OEM Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508716\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eSierra: 18-0897\u003cbr\u003eGLM: 30240\u003cbr\u003eMallory: 9-61413\u003cbr\u003eRECMAR: REC27-863724Q\u003cbr\u003eOther References: MC 20 99208, MC47-27-41813, 8503-GR\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis part is sold individually as a gasket and is not a complete exhaust manifold gasket repair kit.\u003c\/p\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust Manifold Elbow Riser Gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eShut off the engine, disconnect the battery to prevent accidental starting, and allow the exhaust system to cool completely before disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow\/riser securely when removing fasteners, and clean both the manifold and elbow mating surfaces thoroughly without gouging or warping the sealing planes.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the water-passage slots of the replacement restrictor gasket against your exhaust system diagram to confirm the required flow configuration and orientation; do not substitute an open (full-flow) or closed-cooling (block-off) gasket where a restrictor gasket is specified.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly to the engine manufacturer's specifications, supply cooling water before starting the engine and inspect the manifold-to-elbow joint for water or exhaust leaks; shut down immediately and inspect if any leakage or abnormal temperature occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does this gasket differ from open or closed-cooling elbow gaskets?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis part is referenced to the restricted (restrictor) gasket used at raw-water-cooled manifold-to-elbow joints (associated with MerCruiser 27-860233, GLM 30240, and Sierra 18-0897). Open (full-flow) and closed-cooling (block-off) gaskets are separate part numbers for different cooling layouts.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan this gasket be used on MerCruiser Dry Joint exhaust systems?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eIt is only for the raw-water gasket position in compatible GM V6 and small-block V8 Dry Joint “Alternative” exhaust systems (0M serial numbers and up), in addition to the listed wet-joint applications. It is not a universal original dry-joint gasket.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eIs this a full manifold gasket kit or an individual gasket?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eIt is sold individually as a single exhaust manifold elbow\/riser gasket, not a complete exhaust manifold gasket repair kit.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165060325427,"sku":"23GT303","price":10.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-a9d81b1b74a9f208.jpg?v=1792733878"},{"product_id":"27-8637251-closed-center-riser-elbow-gasket-for-mercruiser-v6-v8","title":"27-8637251 Closed Center-Riser Elbow Gasket for MerCruiser V6\/V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold Elbow Riser Gasket — Closed Center-Riser Configuration\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust manifold elbow\/riser gasket (referencing MerCruiser OEM 27-8637251) is designed for specified GM-built MerCruiser V6 and V8 engines, including rear transmission and inboard applications equipped with center-exit exhaust manifolds and the MerCruiser fresh-water \/ closed cooling system. It is a closed center-riser gasket for the exhaust manifold and elbow\/riser joint and must not be substituted for open or restricted water-passage gasket versions.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Layout\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eCenter-exit exhaust manifold \/ center riser\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eWater-Passage Flow Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eClosed (distinct from open and restricted center-riser versions)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling System Requirement\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eFresh-water cooling \/ MerCruiser closed cooling system\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Compatibility\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet Joint on specified 1981 \u0026amp; up \/ 1983 to 0M serial number models; Dry Joint “Alternative” on specified 0M \u0026amp; up V6\/V8 small-block models\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket applies to GM-built MerCruiser V6 and V8 engines—including rear transmission and inboard configurations—equipped with center-exit exhaust manifolds and the MerCruiser closed (fresh-water) cooling system. Match your engine family, cooling system, exhaust joint design, and serial-number range before ordering.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 175–205 (V6, GM 229 \/ 262 CID)\u003c\/strong\u003e — Years \/ Serial Numbers: 1983 through 0M serial numbers. Exhaust \u0026amp; Cooling Configuration: Center Riser, Closed \/ Fresh-Water Cooling, Wet Joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 200–320 (V8 Small Block, GM 305 \/ 350 \/ 377 CID)\u003c\/strong\u003e — Years \/ Serial Numbers: 1983 through 0M serial numbers. Exhaust \u0026amp; Cooling Configuration: Center Riser, Closed \/ Fresh-Water Cooling, Wet Joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 330–370 (V8 Big Block, GM 454 \/ 502 CID)\u003c\/strong\u003e — Years: 1981 \u0026amp; up. Exhaust \u0026amp; Cooling Configuration: Center Riser, Closed \/ Fresh-Water Cooling, Wet Joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \/ V8 Small Block\u003c\/strong\u003e — Serial Numbers: 0M serial numbers \u0026amp; up. Exhaust \u0026amp; Cooling Configuration: Center Riser, Closed \/ Fresh-Water Cooling, Dry Joint “Alternative”.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not imply OEM manufacturer identity or unconditional interchangeability across different cooling configurations.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-8637251, 8637251, 27-863725, 863725, 27-860231, 860231, 27-41811, 41811, 87918, 87918A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0502988, 0508715\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eSierra: 18-0672, 18-0672-9\u003cbr\u003eGLM: 30220\u003cbr\u003eMallory: 9-61422\u003cbr\u003eOther Reference Numbers: 8503-GB, MC-47-27-41811\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDifferent Flow-Configuration References (Not Interchangeable)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-860232 (Open center-riser gasket version)\u003cbr\u003e27-860233 (Restricted center-riser gasket version)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cp style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003eWater-passage identification note: Reference 27-860231 corresponds to this closed center-riser gasket, whereas 27-860232 is an open version and 27-860233 is a restricted version. Even when the physical mounting footprint is similar, different water-passage configurations are not interchangeable.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold elbow\/riser gasket (closed center-riser configuration)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is shut off, completely cool, and secured against accidental starting before servicing any exhaust components.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow\/riser during removal and installation, and clean both the manifold and elbow\/riser mating surfaces without nicking or gouging the sealing planes.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the replacement gasket directly against your closed-cooling joint layout and service manual diagram to confirm that the closed water-passage configuration matches the specific joint location being serviced.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eTighten fasteners according to the sequence and specifications in your engine service manual, then inspect the joint for exhaust or coolant leaks during initial operation; shut down immediately and inspect if any leakage or abnormal temperature occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does 27-860231 \/ 27-8637251 differ from 27-860232 and 27-860233?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eReference 27-860231 (listed along with 27-8637251) designates the closed center-riser gasket for fresh-water \/ closed cooling applications. Reference 27-860232 is the open water-passage version, and 27-860233 is the restricted water-passage version. Because they control water flow differently across the manifold-to-riser joint, these three versions are not interchangeable.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this gasket work with both Wet Joint and Dry Joint MerCruiser exhaust systems?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eIt applies to Wet Joint center-riser closed-cooling setups on Model 175–205 V6 (GM 229\/262 CID, 1983–0M serial numbers), Model 200–320 V8 Small Block (GM 305\/350\/377 CID, 1983–0M serial numbers), and Model 330–370 V8 Big Block (GM 454\/502 CID, 1981 \u0026amp; up). For 0M \u0026amp; up GM V6 and V8 Small Block engines, it is only applicable as the specified Dry Joint “Alternative” configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165060358195,"sku":"23GT297","price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-d1ee5ff275331f09.webp?v=1792733891"},{"product_id":"27-863726-exhaust-full-flow-elbow-gasket-for-mercruiser-gm-v6-v8","title":"27-863726 Exhaust Full Flow Elbow Gasket for MerCruiser GM V6 \u0026 V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Full Flow Elbow Gasket for MerCruiser Wet Joint \u0026amp; Dry Joint Alternative Interfaces\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust full-flow elbow gasket seals the exhaust manifold, elbow, and spacer interfaces on specified MerCruiser GM V6 and V8 applications, referenced to OEM 27-863726. It is configured for open full-flow passages in specified wet-joint applications (1981 and up or 1983 through 0M serial numbers, depending on engine family) and designated GM V6\/V8 small-block dry-joint alternative configurations (0M serial numbers and up).\u003c\/p\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis listing is for the gasket component only, not an exhaust manifold or exhaust elbow assembly.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eComponent Type\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust elbow, manifold, and spacer gasket (single component, not an assembly)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFlow Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eFull Flow (Open)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Interface\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet Joint; or Dry Joint \"Alternative\" on specified GM V6\/V8 small-block configurations\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMounting Location\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold, elbow, and spacer interfaces\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket fits the MerCruiser GM V6 and V8 exhaust manifold and spacer applications listed below when the specified joint configuration, year, and serial number boundaries match. Select the gasket by the required part number, engine family, serial number range, and wet-joint or dry-joint alternative configuration rather than by engine displacement alone, and do not treat an open full-flow gasket, a restricted-flow gasket, and a closed-cooling block-off gasket as the same version.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 175–205 (V6, GM 229 \/ 262 CID)\u003c\/strong\u003e — Years: 1983 through 0M serial numbers. Interface: Exhaust manifold and spacers, Wet Joint, Full Flow (Open) configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 200–320 (V8 Small Block, GM 305 \/ 350 \/ 377 CID)\u003c\/strong\u003e — Years: 1983 through 0M serial numbers. Interface: Exhaust manifold and spacers, Wet Joint, Full Flow (Open) configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 330–370 (V8 Big Block, GM 454 \/ 502 CID)\u003c\/strong\u003e — Years: 1981 \u0026amp; up. Interface: Exhaust manifold and spacers, Wet Joint, Full Flow (Open) configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \/ V8 Small Block\u003c\/strong\u003e — Serial numbers: 0M \u0026amp; up. Interface: Exhaust manifold and spacers, Dry Joint \"Alternative\", Full Flow (Open) configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3 style=\"margin:24px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eApplication Check Required\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003e200 (DFI 7 EFI), 200 PRO XS, 225 (EFI \/ DFI), 225 SEAPRO, 250 (DFI \/ EFI) 3.0L\u003c\/strong\u003e — Listed in supplementary notes without confirmed brand or exhaust manifold interface details. Verify by OEM part number 27-863726 and physical joint configuration before ordering.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eConfirm application\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser GM V6, 229 CID, WET JOINT; Application group MODEL 175-205.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V6, 262 CID, WET JOINT; Application group MODEL 175-205.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 Small Block, 305 CID, WET JOINT; Application group MODEL 200-320.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 Small Block, 350 CID, WET JOINT; Application group MODEL 200-320.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 Small Block, 377 CID, WET JOINT; Application group MODEL 200-320.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 Big Block, 454 CID, WET JOINT; Application group MODEL 330-370.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 Big Block, 502 CID, WET JOINT; Application group MODEL 330-370.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 Small Block, DRY JOINT “ALTERNATIVE” configuration, 0M SN#’s \u0026amp; UP.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not by themselves establish guaranteed interchangeability across all exhaust configurations or indicate original manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-863726, 27-818832, 27-860232, 27-871051, 27-87105-1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMercury Mariner\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-818832, 27-860232, 27-871051, 27-87105\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eShort \/ Unprefixed OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e863726, 818832, 860232, 871051, 87105\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508606\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eYanmar Marine Inboard\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-863726\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-2849-1, 18-2849-9-1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e32080\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61414\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eBARR\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMC47-27-87105, MC4727-87105\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOSCO\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e8503-GO\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust Full Flow Elbow Gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eShut off the engine, allow all exhaust components to cool completely, and disconnect the battery to prevent accidental cranking during service.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust elbows or spacers before loosening fasteners, and remove old gasket material while protecting the machined mating surfaces from scratches or gouges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new full-flow gasket passages directly against the removed gasket, manifold, elbow, and spacer ports to confirm the open-flow layout matches your cooling and joint configuration; never substitute a full-flow gasket where a restrictor or block-off gasket is required.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAlign the gasket at the manifold, elbow, or spacer interface and tighten fasteners in the sequence and torque specified by your engine service manual.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly, run the engine only with proper cooling water supply and inspect the joint for exhaust or water leaks; shut down immediately and inspect if any leakage or abnormal temperature occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan this full-flow gasket be used in place of a restrictor or closed-cooling block-off gasket?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. Open full-flow gaskets, restricted-flow gaskets, and closed-cooling block-off gaskets control water transfer across the manifold, spacer, and elbow joint differently and are not interchangeable. Use this gasket only when your MerCruiser wet-joint or dry-joint alternative setup calls for the full-flow version referenced to 27-863726.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhich joint styles and serial number ranges apply to this gasket?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eIt applies to MerCruiser Wet Joint exhaust manifolds and spacers on Model 175–205 V6 (GM 229\/262 CID, 1983 through 0M serial numbers), Model 200–320 V8 Small Block (GM 305\/350\/377 CID, 1983 through 0M serial numbers), and Model 330–370 V8 Big Block (GM 454\/502 CID, 1981 \u0026amp; up), as well as GM V6\/V8 Small Block Dry Joint \"Alternative\" configurations from 0M serial numbers \u0026amp; up.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165060390963,"sku":"23GT296","price":9.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-16e94cf77ad9a55a.webp?v=1792733907"},{"product_id":"27-864850a02-dry-joint-exhaust-elbow-restrictor-gasket-for-mercruiser","title":"27-864850A02 Dry-Joint Exhaust Elbow Restrictor Gasket for MerCruiser","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eDry-Joint Exhaust Elbow Restrictor Gasket — Standard Cooling\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket restrictor-type dry-joint exhaust elbow gasket (referencing MerCruiser OEM 27-864850A02) seals the joint between a compatible dry-joint exhaust manifold and riser\/elbow in standard-cooling installations. It fits MerCruiser GM V6 and V8 small-block engines (4.3L, 5.0L, 5.7L, and 6.2L), including 2002–2004 models equipped with 7° dry-joint elbows and 2005–2010 models equipped with 14° dry-joint elbows.\u003c\/p\u003e\n \u003cp style=\"margin:0;\"\u003eThis is the restrictor flow configuration only, not the full-flow\/open or block-off\/closed gasket version, and it is a gasket product rather than a complete manifold or riser assembly.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Architecture\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry Joint (standard manifold and riser\/elbow interface)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFlow Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRestrictor\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eStandard Cooling\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCompatible Elbow Designs\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e7° dry-joint elbow (2002–2004 applications); 14° dry-joint elbow (2005–2010 applications)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eDesigned for MerCruiser Stern \/ Out Drive GM V6 and V8 small-block applications equipped with a dry-joint standard manifold and riser under standard cooling. Because dry-joint exhaust gaskets share a similar outer footprint, verify your required OEM part number, cooling configuration, and restrictor water-passage layout before ordering rather than matching by external shape alone.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 Small Block (2002–2004)\u003c\/strong\u003e — Dry Joint exhaust system with 7° elbow design; Standard Cooling; requires Restrictor elbow gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 Small Block (2005–2010)\u003c\/strong\u003e — Dry Joint exhaust system with 14° elbow design; Standard Cooling; requires Restrictor elbow gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4.3L, 5.0L, 5.7L \u0026amp; 6.2L (GM V6 \u0026amp; V8 Small Block)\u003c\/strong\u003e — Utilizing Dry Joint Standard Manifold and Riser; Standard Cooling; requires Restrictor elbow gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust joints requiring a Full-Flow (Open) or Block-Off (Closed) dry-joint elbow gasket configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not imply original-equipment manufacturer identity or automatic interchangeability across different flow configurations.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser OEM References (Restrictor)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e864850A02, 27-864850A02, 27-864850A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket References (Restrictor)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM 37900, Sierra 18-0722, RECMAR REC27-864850A02\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Configuration \u0026amp; Comparison Numbers (Do Not Equate to Restrictor Without Verification)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser Stern \/ Out Drive: 27-864547A1, 27-864547A02, 864547A1, 864547A02, 27-864549A02, 27-864549A1, 864549A02, 27-99757, 27-33395; GLM: 37910, 37920; Sierra: 18-0721, 18-0720\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDry-joint exhaust elbow restrictor gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust system to cool completely, disconnect the battery to prevent accidental starting, and drain the exhaust cooling passages before loosening elbow fasteners.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the heavy exhaust elbow\/riser during removal, clean both dry-joint mating surfaces thoroughly, and protect the machined sealing faces from scratches or gouges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the replacement restrictor gasket ports against the removed gasket and the OEM service manual diagram to make sure the water-passage slots match your standard-cooling layout.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003ePosition the gasket and tighten the riser\/elbow fasteners to the sequence and torque values specified in your MerCruiser service manual.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupply cooling water when starting the engine, inspect the dry-joint interface for water or exhaust leaks, and shut down immediately for inspection if abnormal temperature or leakage occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan this gasket be used in place of a full-flow or block-off dry-joint gasket?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. This part is specifically the restrictor version (referencing MerCruiser 27-864850A02, GLM 37900, and Sierra 18-0722) for standard-cooling installations. Full-flow (open) and block-off (closed) dry-joint gaskets regulate cooling water differently and are not interchangeable with the restrictor version even though their outer perimeter looks similar.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this gasket fit both 7° and 14° MerCruiser dry-joint elbows?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eYes, when the installation uses a dry-joint standard manifold and riser with standard cooling and calls for the restrictor gasket configuration. It covers GM V6 and V8 small-block dry-joint setups using 7° elbows (2002–2004) as well as 14° elbows (2005–2010).\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165060882483,"sku":"24GK048","price":26.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-6841058c0738e6bf.webp?v=1792733988"},{"product_id":"27-864547a02-full-flow-dry-joint-exhaust-elbow-gasket-for-mercruiser","title":"27-864547A02 Full Flow Dry-Joint Exhaust Elbow Gasket for MerCruiser","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eFull Flow Dry-Joint Exhaust Elbow Gasket\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis full-flow (open) dry-joint exhaust elbow gasket (referencing MerCruiser 27-864547A02) seals the connection between an open dry-joint exhaust manifold and riser on specified MerCruiser GM V6 and V8 small-block engines (4.3L, 5.0L, 5.7L, and 6.2L) from 2002 onward. It is designed specifically for open full-flow passages—including 2002–2004 installations with a 7° elbow design and 2005–2010 installations with a 14° elbow design—and is not a restrictor or block-off gasket.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry Joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFlow Pattern\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eFull Flow (Open passage; not a restrictor or block-off gasket)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eManifold \u0026amp; Riser Arrangement\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry Joint Open Manifold and Riser\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAssociated Elbow Design Angles\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e7° elbow design (2002–2004 applications); 14° elbow design (2005–2010 applications)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket fits MerCruiser Stern \/ Out Drive GM V6 and V8 small-block engines equipped with a dry-joint exhaust system requiring a full-flow (open) elbow gasket. Do not select a dry-joint gasket solely by engine displacement; verify the required gasket flow pattern, part number, and the installed manifold and elbow arrangement before ordering.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4.3L, 5.0L, 5.7L, 6.2L\u003c\/strong\u003e — Utilizes Dry Joint Open Manifold and Riser; Full Flow gasket configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 Small Block (2002–2004)\u003c\/strong\u003e — Dry Joint exhaust connection with 7° installed elbow design; Full Flow gasket configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 Small Block (2005–2010)\u003c\/strong\u003e — Dry Joint exhaust connection with 14° installed elbow design; Full Flow gasket configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser V6 \u0026amp; V8 (2002 onward)\u003c\/strong\u003e — Dry Joint exhaust elbow connection with Full Flow configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference. They do not imply that this aftermarket part is manufactured by the original equipment brand, nor are all listed numbers interchangeable across different flow configurations.\u003c\/p\u003e\n \n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eFull-Flow Gasket References (This Configuration)\u003c\/h3\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;margin:0 0 18px;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-864547A02, 864547A02, 27-864547A1, 864547A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0721\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e37910\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eOther Flow Configurations \u0026amp; Comparison References (Not Direct Replacements for Full-Flow)\u003c\/h3\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM (Restrictor Version)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e37900\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM (Block-Off Version)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e37920\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive (Additional References)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-864850A02, 864850A02, 27-864549A02, 864549A02, 27-864549A1, 27-99757, 27-33395\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra (Additional References)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0722, 18-0720\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eFull Flow Dry-Joint Exhaust Elbow Gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely shut off and cooled down, and disconnect the battery or disable the ignition system to prevent accidental starting during service.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust elbows or risers during removal and installation, and clean the mating surfaces carefully without gouging or damaging the sealing planes.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eMatch the gasket water passage slots directly against the manifold and elbow arrangement specified in your engine manual. Do not replace a required restrictor or block-off gasket with a full-flow gasket.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly, inspect the joint under normal operating conditions; if any leakage or abnormal exhaust temperature occurs, shut down the engine immediately and inspect the joint.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003cstrong\u003eConfiguration Warning:\u003c\/strong\u003e Installing a full-flow gasket in a joint that requires a restrictor or block-off gasket can alter cooling water routing. Always follow the flow pattern specified for your exact manifold and riser joint.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan this full-flow gasket be used in place of GLM 37900 or GLM 37920?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. This product is the full-flow (open) gasket corresponding to MerCruiser 27-864547A02, GLM 37910, and Sierra 18-0721. GLM 37900 is a restrictor version and GLM 37920 is a block-off version. Do not substitute a full-flow gasket where a restricted or blocked-off passage is required.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhat do the 7° and 14° designations refer to on 2002–2010 MerCruiser dry-joint engines?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe 7° and 14° figures refer to the installed dry-joint exhaust elbow design angle on the engine—7° for 2002–2004 GM V6 and V8 small-block dry-joint applications, and 14° for 2005–2010 applications—rather than an angle built into the flat gasket itself.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165060915251,"sku":"24GK047","price":26.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-9fbb01961822fd8a.webp?v=1792734003"},{"product_id":"27-864549a02-dry-joint-block-off-elbow-gasket-for-mercruiser-v6-v8","title":"27-864549A02 Dry Joint Block Off Elbow Gasket for MerCruiser V6 \u0026 V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eDry Joint Exhaust Elbow Block Off Gasket for MerCruiser GM V6 and Small Block V8 Closed Cooling Systems\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket Dry Joint exhaust elbow gasket features a Block Off configuration for closed cooling setups and corresponds to MerCruiser reference 27-864549A02. It fits MerCruiser GM V6 and Small Block V8 engines (4.3L, 5.0L, 5.7L, and 6.2L) from 2002 and up utilizing Dry Joint closed manifold and riser assemblies, including 2002–2004 7° and 2005–2010 14° Dry Joint elbow designs.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Design\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry Joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFlow Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eBlock Off\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eClosed Cooling (utilizing Dry Joint closed manifold and riser)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAssociated Elbow Angles by Year\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e7° Dry Joint elbow design (2002–2004); 14° Dry Joint elbow design (2005–2010)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket is configured for MerCruiser Stern \/ Out Drive GM V6 and Small Block V8 engines equipped with Dry Joint exhaust components and closed cooling requiring a Block Off passage. Verify that your cooling layout requires a Block Off gasket rather than a Full Flow or Restrictor passage before installation.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4.3L, 5.0L, 5.7L, 6.2L\u003c\/strong\u003e — Utilizes Dry Joint closed manifold and riser with Closed Cooling (Block Off).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser V6 \u0026amp; V8\u003c\/strong\u003e — Year: 2002-Up. Joint: Dry Joint with Block Off (Closed Cooling).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 S.B. (Small Block)\u003c\/strong\u003e — Year: 2002–2004. Joint: Dry Joint. Associated Elbow Design Angle: 7°. Flow Configuration: Block Off (Closed Cooling).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 S.B. (Small Block)\u003c\/strong\u003e — Year: 2005–2010. Joint: Dry Joint. Associated Elbow Design Angle: 14°. Flow Configuration: Block Off (Closed Cooling).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 S.B. (Small Block)\u003c\/strong\u003e — Joint: Dry Joint. Flow Configuration: Block Off (Closed Cooling).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThese part numbers are provided for identification reference only and do not independently establish direct interchangeability or manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-864549A02, 864549A02, 27-864549A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0720\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e37920\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDry Joint exhaust elbow Block Off gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely shut down, cooled, and secured against accidental starting before servicing the exhaust system.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow during removal and installation, and clean both Dry Joint mating surfaces thoroughly without gouging or damaging the sealing areas.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new Block Off gasket against the removed gasket and the mating surfaces on your closed manifold and riser to verify port alignment and coolant passage blocking requirements.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter assembly, inspect the joint during initial operation and stop the engine immediately if any exhaust or coolant leakage or abnormal temperature is observed.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhat do the 7° and 14° specifications mean for this gasket?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe 7° (2002–2004) and 14° (2005–2010) figures describe the angle of the mating Dry Joint exhaust elbow on MerCruiser GM V6 and Small Block V8 engines rather than an angle built into the gasket body itself.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhen is a Block Off Dry Joint gasket used?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis Block Off gasket is used on MerCruiser 4.3L, 5.0L, 5.7L, and 6.2L GM V6 and Small Block V8 engines (2002-Up) equipped with a closed cooling system utilizing a Dry Joint closed manifold and riser where coolant flow between the manifold and elbow is blocked at the joint.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165061242931,"sku":"24GK115","price":27.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-6ea4d430724c9c73.jpg?v=1792734018"},{"product_id":"27-33395-27-41813-manifold-elbow-gasket-kit-for-mercruiser-v6-v8","title":"27-33395 27-41813 Manifold \u0026 Elbow Gasket Kit for MerCruiser V6 V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eManifold \u0026amp; Elbow Gasket Kit for MerCruiser V6 and V8 Exhaust Systems\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust gasket set contains two exhaust manifold gaskets (reference 27-33395) and two exhaust elbow-joint gaskets (reference 27-41813) for servicing compatible MerCruiser 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, and 8.2L (including 350 MAG, 454 MAG, and 502 MAG) stern drive and inboard exhaust assemblies. This product is a gasket set only, not an exhaust manifold or elbow assembly.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eIntended for the MerCruiser V6 and V8 engine applications listed below when both the manifold-to-head gasket (27-33395) and elbow-joint gasket (27-41813) match your installed exhaust components. Do not select the complete set from engine displacement alone; check both references separately and verify whether your elbow joint requires a restrictor-type gasket rather than an open or block-off version.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 350 MAG\u003c\/strong\u003e — V8 exhaust manifold and elbow joint service. Requires manifold gasket reference 27-33395 and elbow-joint gasket reference 27-41813.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 454 MAG\u003c\/strong\u003e — V8 exhaust manifold and elbow joint service. Requires manifold gasket reference 27-33395 and elbow-joint gasket reference 27-41813.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 502 MAG\u003c\/strong\u003e — V8 exhaust manifold and elbow joint service. Requires manifold gasket reference 27-33395 and elbow-joint gasket reference 27-41813.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4.3L\u003c\/strong\u003e — V6 exhaust manifold and elbow joint service. Requires manifold gasket reference 27-33395 and elbow-joint gasket reference 27-41813.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 5.0L\u003c\/strong\u003e — V8 exhaust manifold and elbow joint service. Requires manifold gasket reference 27-33395 and elbow-joint gasket reference 27-41813.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 5.7L\u003c\/strong\u003e — V8 exhaust manifold and elbow joint service. Requires manifold gasket reference 27-33395 and elbow-joint gasket reference 27-41813.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 6.2L\u003c\/strong\u003e — V8 exhaust manifold and elbow joint service. Requires manifold gasket reference 27-33395 and elbow-joint gasket reference 27-41813.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 7.4L\u003c\/strong\u003e — V8 exhaust manifold and elbow joint service. Requires manifold gasket reference 27-33395 and elbow-joint gasket reference 27-41813.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 8.2L\u003c\/strong\u003e — V8 exhaust manifold and elbow joint service. Requires manifold gasket reference 27-33395 and elbow-joint gasket reference 27-41813.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification across the individual manifold and elbow gaskets associated with this kit. Listing a reference number does not by itself confirm full-kit interchangeability or OEM manufacturer status.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary Kit Component References (MerCruiser)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eManifold gasket: 27-33395, 33395\u003cbr\u003eElbow-joint gasket: 27-41813, 41813\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-33395, 33395, 27-33395A2, 8M2000819, 33395A1, 33395B, 879039, 27-41813, 41813, 27-41813-1, 27-860233, 27-863724, 27-863724Q, 863724B, 863724Q, 863724\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e96306, 096306, 0508556, 0508874, 0778149, 0908314, 0908485, 0909314, 0985630, 3852468, 0508716\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eVolvo Penta References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3852468, 835256, 835966, 856034, 856116\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCrusader Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e96306\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-2949, 18-0897 (identified as a restrictor-type exhaust elbow gasket), 18-4349\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eBARR \/ GLM \/ Mallory References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eBARR: CHV-47-000\u003cbr\u003eGLM: 30240\u003cbr\u003eMallory: 9-61413\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Aftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-2902, 18-2949-9, 18-0872\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003cstrong\u003eElbow Joint Flow Configuration Note:\u003c\/strong\u003e Sierra 18-0897 is identified as a restrictor-type exhaust elbow gasket. Do not assume that an open (full-flow) or block-off version is interchangeable for your elbow joint.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust manifold gaskets (reference 27-33395 \/ 33395)\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust elbow gaskets (reference 27-41813 \/ 41813)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely cool, shut off the ignition, and disconnect the battery to prevent accidental starting before servicing exhaust components.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifolds and elbows securely during removal and reassembly to avoid personal injury or damage to mounting threads and mating surfaces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean all cylinder head, manifold, and elbow mating surfaces thoroughly to remove old gasket material, carbon, or corrosion while protecting the sealing surfaces from gouges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new manifold gaskets (27-33395) and elbow gaskets (27-41813) directly against the removed parts and the port layout of the castings, paying close attention to the elbow-joint passage configuration.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eTighten fasteners according to the sequence and torque specifications in your OEM engine service manual. After starting the engine, inspect all joints closely and shut down immediately if any exhaust or water leakage is detected.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan I select this gasket kit based only on my MerCruiser engine displacement?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. MerCruiser V6 and V8 engines across 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, and 8.2L (including 350 MAG, 454 MAG, and 502 MAG) can use different manifold and elbow designs depending on production series and cooling layout. Match both the manifold gasket reference (27-33395) and the elbow-joint gasket reference (27-41813) individually against your installed exhaust hardware.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eAre open, restrictor, and block-off elbow gaskets interchangeable?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. Elbow-joint gaskets control water passage flow between the manifold and elbow. Among the cross-references listed for this set, Sierra 18-0897 is identified as a restrictor-type exhaust elbow gasket. An open (full-flow) or block-off gasket should not be substituted where a restrictor gasket is specified, and vice versa.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165066190899,"sku":"24MFK134","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-7a48a1edbfa2349d.jpg?v=1792734198"},{"product_id":"27-99757-27-41813-manifold-gasket-kit-for-mercruiser-v6-4-3l-4-5l","title":"27-99757 27-41813 Manifold Gasket Kit for MerCruiser V6 4.3L 4.5L","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eManifold Gasket Kit for MerCruiser V6 4.3L and 4.5L\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust manifold gasket kit contains two manifold-to-cylinder head gaskets and two exhaust elbow\/riser gaskets for listed MerCruiser V6 4.3L and 4.5L applications. It corresponds to primary MerCruiser reference numbers 27-99757 and 27-41813 across the two distinct sealing joints.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket set is intended for replacing the exhaust manifold and elbow\/riser gaskets on the MerCruiser V6 engines listed below. Match both gasket positions to your engine's required part references and exhaust configuration before ordering, and do not select an open-flow or restrictor elbow gasket solely because it appears visually similar.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser V6 4.3L\u003c\/strong\u003e — Exhaust manifold-to-cylinder head and exhaust elbow\/riser gasket positions.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser V6 4.5L\u003c\/strong\u003e — Exhaust manifold-to-cylinder head and exhaust elbow\/riser gasket positions.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for component identification across the manifold-to-cylinder head and exhaust elbow\/riser gasket positions. They do not indicate manufacturer identity or guarantee interchangeability among different elbow gasket flow versions. Check full part-number suffixes for your specific joint.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary MerCruiser References (by Joint)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99757, 99757, 8M0215011 \/ 27-41813, 41813\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99757, 99757, 8M0215011, 27-41813, 41813, 27-41813-1, 27-860233, 27-863724, 27-863724Q, 863724, 863724B, 863724Q\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eVolvo Penta\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3853412, 841601, 856116\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508630, 0508716, 0778257, 0910157, 910157, 0915022, 0915025, 915025, 3852468, 3853412\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCrusader\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e97498\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eYamaha Outboard\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eYSC-12190-00-AC\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0897, 18-2909, 18-2909-9\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e30240, 32170\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61413, 9-61421\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional Cross-References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMC 20 99208, MC47-27-41813, 8503-GR\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003cstrong\u003eJoint Separation Note:\u003c\/strong\u003e The manifold-to-cylinder head gasket and the exhaust elbow\/riser gasket serve different joints. Their reference numbers are not interchangeable between these two positions.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Manifold-to-cylinder head gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust elbow\/riser gaskets\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust components to cool completely, and disconnect the battery or disable the ignition to prevent accidental starting.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifolds and elbows securely during disassembly so weight does not rest on fasteners or damage mating flanges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean all cylinder head, manifold, and elbow sealing surfaces thoroughly, taking care not to gouge or distort the machined metal faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eIdentify the manifold-to-cylinder head gaskets and the exhaust elbow\/riser gaskets separately, and verify that the port alignment on each gasket matches its respective joint before tightening fasteners to the engine manual's specification.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eInspect the exhaust joints during initial operation; if any exhaust or water leak is observed, shut the engine down immediately and inspect the assembly.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhat gaskets are included in this kit?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis set includes two manifold-to-cylinder head gaskets and two exhaust elbow\/riser gaskets for listed MerCruiser V6 4.3L and 4.5L applications.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eAre the reference numbers interchangeable between the manifold and elbow joints?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. The manifold-to-cylinder head gasket and the exhaust elbow\/riser gasket seal two separate interfaces. Their reference numbers apply to their specific positions and cannot be swapped between the cylinder head joint and the elbow joint.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165068451891,"sku":"24MFK135","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-03cec6821815af14.jpg?v=1792734218"},{"product_id":"27-96429-wet-joint-exhaust-manifold-gasket-kit-for-mercruiser-120-140","title":"27-96429 Wet-Joint Exhaust Manifold Gasket Kit for MerCruiser 120 140","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003cdiv style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eMerCruiser Wet-Joint Exhaust Manifold Gasket Repair Kit for Models 120 and 140\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis wet-joint exhaust manifold gasket repair kit is configured for MerCruiser Models 120 and 140 inline 4-cylinder engines (153 and 181 CID, 1982–1995), covering both old-style and new-style setups. It combines exhaust manifold mounting gaskets (referencing 27-96429), open and closed-cooling manifold-to-elbow gaskets, Rochester and MerCarb carburetor mounting gaskets, and a drain plug with an O-ring for wet-joint service.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint System\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet-joint exhaust system (Old Style and New Style)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eEngine Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eInline 4-cylinder, 153 \/ 181 CID\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eManifold Mounting Identification\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eComponent reference 27-96429 identifies the old-style manifold mounting gasket version\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eManifold-to-Elbow Flow Options\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eIncludes both the open manifold-to-elbow gasket (reference 27-99777-2) and the closed-cooling rear-riser gasket (reference 27-92720)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCarburetor Mounting Options\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eIncludes separate Rochester and MerCarb-related carburetor mounting-gasket versions (referencing 27-64692 and 27-807982)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis kit applies to the MerCruiser inline 4-cylinder engines listed below. Because the package contains multiple manifold-to-elbow flow plates and carburetor base gaskets, match each individual gasket to the installed manifold style, cooling arrangement, and carburetor version before assembly.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 120\u003c\/strong\u003e — Inline 4, 4-cylinder, 153 \/ 181 CID, 1982–1995. Wet-joint exhaust system; Old Style and New Style configurations.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 140\u003c\/strong\u003e — Inline 4, 4-cylinder, 153 \/ 181 CID, 1982–1995. Wet-joint exhaust system; Old Style and New Style configurations.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eApplication Check Required\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThis kit is specified for wet-joint applications. Confirm compatibility separately if working on a dry-joint exhaust system or an engine outside the listed 1982–1995 Model 120\/140 applications.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for component identification and cross-reference only; they do not indicate manufacturer identity or guarantee standalone interchangeability. The listed OEM numbers identify individual component references within this assortment, not a single OEM part number for the complete kit.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary Component OEM References (MerCruiser)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-96429 (old-style manifold mounting gasket), 27-99777, 27-99777-2 (open manifold-to-elbow gasket), 27-92720 (closed-cooling rear-riser gasket), 27-64692, 27-807982\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional MerCruiser Stern \/ Out Drive References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e96429, 27-997772, 27-99777Q02, 997771, 99777B2, 27-997771, 27-99777B2, 27-52076, 52076, 99777Q02, 92720, 27-32910, 64692, 32910, 27-807982-1, 27-807982B, 27-70143-1, 8079821, 27807982 1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Component Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508615\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-1204, 18-1204-1, 18-1204-1-9, 18-2833, 18-0954, 18-0356\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e33570, 31520, 32630, 31660\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61419, 9-61415\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Cross-References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0912164, 912164, 18-0937, 0315055, 0508563, 0508579, 0777923, 315055, 508563, 508579, 777923, 47-315055, 3557\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold mounting gaskets (includes old-style version referencing 27-96429)\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eOpen manifold-to-elbow gaskets (referencing 27-99777 \/ 27-99777-2)\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClosed-cooling rear-riser manifold-to-elbow gaskets (referencing 27-92720)\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCarburetor mounting gaskets for Rochester and MerCarb versions (referencing 27-64692 and 27-807982)\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDrain plug with O-ring\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust assembly to cool completely, disconnect the battery to prevent accidental starting, and drain the exhaust manifold and riser cooling passages before disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy manifold and elbow castings during removal, and clean all mating flanges thoroughly while protecting the machined sealing surfaces from gouges or warping.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSelect the manifold mounting gasket that matches your cylinder head and manifold flange layout (noting that reference 27-96429 corresponds to the old-style version).\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSelect either the open manifold-to-elbow gasket (reference 27-99777-2) or the closed-cooling rear-riser gasket (reference 27-92720) strictly according to your engine's cooling configuration. Do not substitute an open gasket where a closed-cooling gasket is specified.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the supplied Rochester and MerCarb carburetor mounting gaskets against the installed carburetor base to ensure vacuum channels and throttle bores align unobstructed, and fit the drain plug with its O-ring.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eTighten fasteners to the manufacturer's service manual specifications. Upon startup with proper cooling water supply, inspect all exhaust, water, and fuel-air joints; shut down immediately and inspect if any leakage or abnormal exhaust temperature occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003cdiv style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow do the manifold-to-elbow gaskets in this kit differ?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThe kit supplies two distinct wet-joint manifold-to-elbow configurations: reference 27-99777-2 is the open-flow manifold-to-elbow gasket, while reference 27-92720 is the closed-cooling rear-riser gasket. Only install the version that matches your engine's cooling circuit.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhy does the kit include multiple carburetor mounting gaskets?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eMerCruiser 120 and 140 inline 4-cylinder engines (153\/181 CID, 1982–1995) were equipped with either Rochester or MerCarb carburetors. Both carburetor mounting-gasket versions (referencing 27-64692 and 27-807982) are included so you can use the profile matching your installed carburetor.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171571654707,"sku":"24MFK117GK","price":42.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-9c1860e59ab4ce1a.png?v=1792749990"},{"product_id":"27-96429-wet-joint-exhaust-manifold-gasket-kit-for-mercruiser-120-140-2","title":"27-96429 Wet-Joint Exhaust Manifold Gasket Kit for MerCruiser 120\/140","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003cdiv style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eWet-Joint Exhaust Manifold Gasket Repair Kit for MerCruiser 120\/140 Inline-4 Engines (1982–1995)\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket gasket repair kit services the wet-joint exhaust manifold system on MerCruiser Model 120 and Model 140 inline-four engines (153\/181 CID, 4-cylinder) from 1982 through 1995, combining component references such as 27-96429, 27-99777, 27-92720, and 27-807982. The component selection includes manifold mounting gaskets, open and closed-cooling rear-riser gasket types, carburetor base gaskets, and a drain plug with an O-ring; the different gasket types are intended for specific joints and cooling configurations rather than simultaneous installation at the same joint.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet-joint exhaust manifold system\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eEngine Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eInline-4, 4-cylinder (153 CID \/ 181 CID)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eRiser Gasket Types Included\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eOpen-cooling and closed-cooling rear-riser gasket types (for matching to the specific cooling setup; not interchangeable and not installed together at the same joint)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis kit applies to the MerCruiser inline-four wet-joint exhaust applications listed below. Verify your engine model, displacement, year range, and wet-joint exhaust configuration before ordering.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 120\u003c\/strong\u003e — Inline-4, 4-cylinder, 153\/181 CID; Years: 1982–1995; Configuration: Wet-joint exhaust manifold system.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 140\u003c\/strong\u003e — Inline-4, 4-cylinder, 153\/181 CID; Years: 1982–1995; Configuration: Wet-joint exhaust manifold system.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"margin:18px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eApplication Check Required\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eDry-Joint Exhaust Systems\u003c\/strong\u003e — Compatibility is not confirmed for dry-joint exhaust configurations; verify requirements separately if your engine uses a dry-joint system.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eConfirm application\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for component identification and cross-reference only. They do not establish manufacturer identity, and individual component numbers do not represent interchangeable complete-kit replacement numbers.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary Component References (MerCruiser)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-96429, 27-99777, 27-92720, 27-807982 (refer to individual components within the kit, not complete-kit replacements)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-52076, 27-70143-1, 27-807982, 27-807982-1, 27-807982B, 27-92720, 27-96429, 27-99777, 27-99777-2, 27-997771, 27-997772, 27-99777B2, 27-99777Q02, 27807982 1, 52076, 806608, 806608A02, 806608A1, 806608Q01, 8079821, 8M0103971, 8M0119211, 92720, 96429, 997771, 99777B2, 99777Q02\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMercury Mariner\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e22806608Q01, 806608, 806608A02, 806608A1, 806608Q01, 8M0103971, 8M0119211\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508568, 0508615, 0778087, 0909758, 0912164, 912164\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0954, 18-0994, 18-0994-9, 18-1204, 18-1204-1, 18-1204-1-9, 18-2833, 18-4226\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e31520, 32180, 32630, 33570\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61011, 9-61415, 9-61419\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOBR Red Rhino\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMR-511\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eManifold mounting gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eOpen-cooling and closed-cooling rear-riser gasket types\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCarburetor base gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDrain plug with O-ring\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n This kit includes multiple gasket types to cover different joints and cooling configurations on the specified engine models. Do not install open-cooling and closed-cooling riser gaskets together at the same joint.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust assembly to cool completely, disconnect the battery to prevent accidental starting, and drain the exhaust manifold and riser water passages before loosening fasteners.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifold and riser castings during disassembly, and clean all mating surfaces thoroughly without gouging or warping the sealing planes.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSelect the specific rear-riser gasket that matches your engine's open or closed cooling configuration; do not stack or combine different riser gasket types at the same joint.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eVerify that gasket port openings align properly with the manifold, riser, and carburetor mounting surfaces, and seat the O-ring properly on the drain plug before tightening hardware to the engine manufacturer's specifications.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly, supply cooling water and inspect all exhaust, water, and carburetor mounting joints for leaks during initial operation; shut down immediately and inspect if any leakage or overheating occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003cdiv style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eAre the four main MerCruiser numbers interchangeable complete-kit numbers?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. Reference numbers 27-96429, 27-99777, 27-92720, and 27-807982 correspond to individual components included within this service kit rather than interchangeable complete-kit part numbers.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eShould both open-cooling and closed-cooling rear-riser gaskets be installed together?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. The kit supplies both open-cooling and closed-cooling rear-riser gasket types to accommodate different system setups on MerCruiser 120 and 140 inline-four engines (1982–1995). They are not interchangeable and are not installed at the same joint.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171571753011,"sku":"24MFK119-1GK","price":46.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-ca900e7b5a26c636.png?v=1792750002"},{"product_id":"27-815528-wet-joint-exhaust-manifold-gasket-kit-for-mercruiser-3-0l","title":"27-815528 Wet-Joint Exhaust Manifold Gasket Kit for MerCruiser 3.0L","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eMerCruiser Wet-Joint Exhaust Manifold Gasket Repair Kit for 3.0LX \/ 3.0L\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis wet-joint exhaust manifold gasket repair kit (including primary component reference 27-815528) is designed for MerCruiser 3.0LX and 3.0L GM 181 CID inline four-cylinder applications from 1990 onward. It supplies manifold, exhaust-elbow, and carburetor-base gaskets along with a drain plug and O-ring for wet-joint exhaust manifold service, requiring selection of the included open or closed-cooling elbow gasket that matches your engine's cooling arrangement.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint Style\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet Joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eEngine Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGM 181 CID, Inline 4-Cylinder (4-Cyl.)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eElbow Gasket Options\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eOpen version (referenced by 27-99777-2 \/ 27-99777) and Closed-cooling version (referenced by 27-92720)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional Sealing Components\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eManifold gasket (referenced by 27-815528), carburetor-base gasket (referenced by 27-807982), and drain plug with O-ring\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis kit applies to the MerCruiser inline four-cylinder models listed below. Before installation, verify that your engine is a 3.0LX or 3.0L GM 181 CID model with a wet-joint exhaust system, and select the exhaust-elbow gasket that corresponds to your open or closed cooling arrangement.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.0LX\u003c\/strong\u003e — GM 181 CID, Inline 4-Cylinder (4-Cyl.). Years: 1990 \u0026amp; Up. Configuration: Wet-joint exhaust manifold system; select the included open (27-99777-2) or closed-cooling (27-92720) exhaust-elbow gasket to match the engine's cooling arrangement.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.0L\u003c\/strong\u003e — GM 181 CID, Inline 4-Cylinder (4-Cyl.). Years: 1990 \u0026amp; Up. Configuration: Wet-joint exhaust manifold system; select the included open (27-99777-2) or closed-cooling (27-92720) exhaust-elbow gasket to match the engine's cooling arrangement.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for component identification and cross-reference only; they do not by themselves guarantee complete-kit interchangeability or indicate original manufacturer identity. In this kit, the primary gasket numbers identify distinct individual component types rather than four interchangeable complete-kit part numbers.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary Component Roles (MerCruiser Reference)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-815528 (Manifold gasket); 27-99777 \/ 27-99777-2 (Open exhaust-elbow gasket); 27-92720 (Closed-cooling exhaust-elbow gasket); 27-807982 (Carburetor-base gasket)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive Component \u0026amp; Related References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e\n Manifold series: 27-815528, 815528\u003cbr\u003e\n Open elbow gasket series: 27-99777, 27-99777-2, 27-997772, 27-99777Q02, 997771, 99777B2, 27-997771, 27-99777B2, 27-52076, 52076, 99777Q02\u003cbr\u003e\n Closed-cooling elbow gasket series: 27-92720, 92720\u003cbr\u003e\n Carburetor-base gasket series: 27-807982, 27-807982-1, 27-807982B, 27-70143-1, 8079821, 27807982 1, 27-701431, 27-8079821, 27-70143, 27-70143B1\n \u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC \/ OMC Cobra Stern \/ Out Drive References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3853256, 914518, 914578, 0914578, 0508615, 0508568, 0778087, 0909758\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eVolvo Penta Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3853256\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0680, 18-2833, 18-2833-9, 18-0954, 18-0994, 18-0994-9\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e33580, 31520, 32630, 32180\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61428, 9-61415, 9-61011\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional Aftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e806608A1, 17304, MAR879\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold gasket (referenced by 27-815528)\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust-elbow gaskets (open version referenced by 27-99777-2 \/ 27-99777 and closed-cooling version referenced by 27-92720)\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCarburetor-base gasket (referenced by 27-807982)\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDrain plug with O-ring\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust system to cool completely, shut off the battery switch, and prevent accidental starting before beginning disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDrain the exhaust manifold and elbow cooling passages using the manifold drain location before unbolting wet-joint components so residual water does not enter the cylinders or intake tract.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy manifold and elbow castings during removal and clean all mating surfaces thoroughly, taking care not to gouge or score the sealing faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eIdentify the correct exhaust-elbow gasket for your cooling arrangement—using the open version (referenced by 27-99777-2) or the closed-cooling version (referenced by 27-92720) as specified by your engine manual—and match the manifold gasket (27-815528), carburetor-base gasket (27-807982), and drain plug with O-ring to their respective locations.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eTighten all fasteners in the sequence and to the torque values specified in the engine service manual.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupply cooling water before starting the engine, then inspect the manifold, elbow joint, carburetor base, and drain plug for water, exhaust, or vacuum leaks; shut down the engine immediately and inspect if any leakage or abnormal temperature occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eAre 27-815528, 27-99777, 27-92720, and 27-807982 four interchangeable complete-kit numbers?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. Those four numbers identify individual component types included within this repair kit: 27-815528 references the manifold gasket, 27-99777 (or 27-99777-2) references the open exhaust-elbow gasket, 27-92720 references the closed-cooling exhaust-elbow gasket, and 27-807982 references the carburetor-base gasket.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow do I choose between the two exhaust-elbow gasket configurations in this kit?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eSelect the exhaust-elbow gasket that matches the cooling arrangement on your MerCruiser 3.0LX or 3.0L (GM 181 CID, 1990 \u0026amp; Up) wet-joint exhaust system. The open version is referenced by 27-99777-2 (27-99777), while the closed-cooling version is referenced by 27-92720.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171571949619,"sku":"24MFK120-1GK","price":46.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-97f430799af8872f.png?v=1792750014"},{"product_id":"27-46820-wet-joint-exhaust-manifold-gasket-kit-for-mercruiser-454-502","title":"27-46820 Wet-Joint Exhaust Manifold Gasket Kit for MerCruiser 454\/502","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eWet-Joint Exhaust Manifold Gasket Repair Kit for MerCruiser GM 454 \u0026amp; 502 CID V8\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis wet-joint exhaust manifold gasket repair kit services MerCruiser Models 330–370 with GM 454 CID and 502 CID big-block V8 engines from 1981 and up in 3-inch and 4-inch exhaust configurations. Component references covered within this multi-part kit include MerCruiser 27-46820, alongside raw-water-cooling, closed-cooling, full-flow elbow gasket, and drain plug components.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet-joint exhaust system\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Size Options\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3-inch and 4-inch configurations\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling \u0026amp; Flow Types Included\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRaw-water-cooling gasket types, center-riser closed-cooling gasket types, and full-flow elbow gaskets\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eConfirm the GM big-block V8 engine specification, installed wet-joint exhaust design, 3-inch or 4-inch exhaust configuration, and whether the manifold uses raw-water cooling or a center-riser closed-cooling arrangement before selecting the specific gaskets to install from the kit.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive Model 330–370, V8 (Big Block), GM 454 \/ 502 CID\u003c\/strong\u003e — Years: 1981 \u0026amp; up. Exhaust configuration: Wet-joint exhaust manifold system, 3-inch and 4-inch configurations. Supports raw-water cooling and center-riser closed-cooling gasket selection, plus full-flow elbow gasket service.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — match the included gasket type to the installed 3-inch or 4-inch wet-joint exhaust and raw-water or closed-cooling arrangement.\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser MODEL 330-370, GM V8 Big Block, 454 CID, wet-joint exhaust, 3-inch and 4-inch configurations, from 1981 onward\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 330-370, GM V8 Big Block, 502 CID, wet-joint exhaust, 3-inch and 4-inch configurations, from 1981 onward\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided as identification references and do not by themselves guarantee interchangeability or indicate original manufacturer identity. The listed OEM and aftermarket numbers identify individual component references included across this repair kit; they are not interchangeable complete-kit part numbers.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary Component OEM References (MerCruiser)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-46820, 27-863724, 27-860231, 27-863726\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-46820, 27-46820A1, 46820, 46820A1, 27-863724, 27-863724Q, 863724, 863724B, 863724Q, 27-860231, 860231, 27-863726, 41813, 27-41813, 27-860233, 8637251, 27-8637251, 863725, 27-863725, 41811, 27-41811, 87918, 87918A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMercury Mariner Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-41813, 27-860233, 27-863724\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC \/ OMC Cobra Stern \/ Out Drive Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508878, 0778127, 0909613, 508878, 778127, 909613, 3852472, 0508716, 0502988, 0508715\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eVolvo Penta Component Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3852472\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCrusader Component Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e96653\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0418, 18-0897, 18-0672, 18-0672-9\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e33760, 37760, 30240\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61400, 9-61413\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Aftermarket Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMC 20 99208, MC47-27-41813, 8503-GR\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe package contains two each of the five component types listed below:\u003c\/p\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust manifold gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Raw-water-cooling gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Closed-cooling gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Full-flow elbow gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Drain plugs supplied with O-rings\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n Gasket types in this kit are selected according to the installed cooling and exhaust configuration and are not all used together at one installation position.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is shut off and completely cool, disconnect the battery to prevent accidental starting, and drain the exhaust manifold and cooling passages before disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifold and riser components during removal, and clean all mating surfaces carefully without gouging or damaging the sealing faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eIdentify whether the system uses raw-water cooling or a center-riser closed-cooling arrangement and match the required gasket pass-through configuration before assembly; do not install mismatched flow or block-off gaskets for your cooling setup.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eFit the drain plugs with their O-rings and tighten all fasteners according to the sequence and specifications in the engine service manual.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter assembly, run the engine only with a verified cooling water supply and inspect all manifold, elbow, and drain plug joints for water or exhaust leaks; stop the engine immediately if any leakage or overheating occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eAre all gaskets in this kit installed at the same time?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. The kit includes two each of manifold gaskets, raw-water-cooling gaskets, closed-cooling gaskets, and full-flow elbow gaskets so you can select the exact gasket types required by your installed cooling and exhaust configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDo the listed OEM numbers represent the complete kit?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. The OEM and aftermarket numbers listed on this page identify individual gaskets and components contained within the package rather than interchangeable complete-kit part numbers.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171572015155,"sku":"24MFK126GK","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-48e10f12b2d4cc98.png?v=1792750026"},{"product_id":"dry-joint-closed-cooling-exhaust-gasket-kit-for-mercruiser-gm-v6","title":"Dry-Joint Closed-Cooling Exhaust Gasket Kit for MerCruiser GM V6","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eClosed-Cooling Dry-Joint Exhaust Manifold Gasket Repair Kit for MerCruiser GM V6\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust manifold gasket repair kit services MerCruiser GM V6 small-block dry-joint, closed-cooling exhaust systems from 2002 through 2010, covering 7-degree dry-joint systems (2002–2004) and 14-degree dry-joint systems (2005–2010).\u003c\/p\u003e\n \u003cp style=\"margin:0;\"\u003eIt combines exhaust manifold gaskets (reference 27-99757), closed-cooling block-off dry-joint gaskets (27-864549A02), full-flow dry-joint gaskets (27-864547A1), and drain plugs supplied with O-rings for closed-cooling V6 manifold maintenance.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint Design\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry Joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eClosed Cooling\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGasket Flow Configurations Included\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eBlock-off dry-joint gaskets and full-flow dry-joint gaskets (along with manifold-to-head gaskets)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMatching Elbow \/ Riser Angle \u0026amp; Years\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e7-degree dry-joint systems (2002–2004); 14-degree dry-joint systems (2005–2010)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eMatch this kit to the installed exhaust-joint design, cooling configuration, riser\/elbow angle, and gasket references rather than engine year alone.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 S.B. Dry Joint (2002–2004)\u003c\/strong\u003e — Closed-cooling exhaust system with 7-degree dry-joint design.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified: Requires GM V6 small-block dry-joint (7-degree) closed-cooling exhaust configuration.\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 S.B. Dry Joint (2005–2010)\u003c\/strong\u003e — Closed-cooling exhaust system with 14-degree dry-joint design.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified: Requires GM V6 small-block dry-joint (14-degree) closed-cooling exhaust configuration.\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eStandard-cooling restrictor versions use a different gasket configuration. Select this kit only for the specified V6 closed-cooling dry-joint application; do not treat it as a universal gasket kit for every MerCruiser engine or exhaust configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided as identification references for the individual gasket and drain-plug components associated with this kit. They do not by themselves establish universal interchangeability across complete engine assemblies or indicate original manufacturer identity. Distinguish closed-cooling block-off gasket references (27-864549A02, 27-864549A1) from full-flow references (27-864547A02, 27-864547A1).\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary Component OEM References (MerCruiser)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99757, 864549A02, 864547A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDry-Joint Block-Off Gasket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser: 27-864549A02, 27-864549A1, 864549A02\u003cbr\u003eGLM: 37920\u003cbr\u003eSierra: 18-0720\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDry-Joint Full-Flow \u0026amp; Related Joint Gasket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser: 27-864547A02, 27-864547A1, 864547A02, 864547A1, 27-864850A02\u003cbr\u003eGLM: 37910\u003cbr\u003eSierra: 18-0721, 18-0722\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Manifold Gasket Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser: 27-99757, 99757, 8M0215011\u003cbr\u003eGLM: 32170, GLM32170\u003cbr\u003eMallory: 9-61421\u003cbr\u003eSierra: 18-2909, 18-2909-9\u003cbr\u003eOMC Cobra: 3853412, 910157, 915025, 0508630, 0778257, 0910157, 0915022, 0915025, 3852468\u003cbr\u003eVolvo Penta: 3853412, 841601, 856116\u003cbr\u003eCrusader: 97498\u003cbr\u003eYamaha Outboard: YSC-12190-00-AC\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDrain Plug \u0026amp; O-Ring Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMercury Mariner \/ MerCruiser: 806608A1, 806608, 806608A02, 806608Q01, 8M0119211, 8M0103971\u003cbr\u003eMerCruiser: 22-806608A1, 22-806608A02, 22-8M0119211, 25-26802\u003cbr\u003eMercury Mariner: 22806608Q01\u003cbr\u003eGLM: 13992\u003cbr\u003eMallory: 9-41203\u003cbr\u003eOBR Red Rhino: MR-511\u003cbr\u003eSierra: 18-4226\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust manifold gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Block-off dry-joint gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Full-flow dry-joint gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Drain plugs supplied with O-rings\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eShut off the engine, disconnect battery power to prevent accidental starting, and allow the exhaust system and coolant to cool completely before servicing.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDrain the manifolds and risers as specified in your engine manual before unbolting joint hardware, supporting heavy exhaust components during disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean all mating surfaces on the cylinder heads, exhaust manifolds, and dry-joint elbows, taking care not to scratch or gouge the sealing faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003ePosition the block-off and full-flow dry-joint gaskets in the exact joint locations required by your closed-cooling system layout. Do not substitute full-flow gaskets where block-off or restrictor gaskets are required.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eInstall the drain plugs with their O-rings and tighten all fasteners to the sequence and specifications in your MerCruiser service manual. After refilling and starting with proper cooling water supply, inspect all joints and drain plugs for coolant, water, or exhaust leaks; stop the engine immediately if any abnormality occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow do the 7-degree and 14-degree dry-joint systems relate to this gasket kit?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThe listed applications for this closed-cooling GM V6 dry-joint gasket repair kit cover both 7-degree dry-joint systems from 2002–2004 and 14-degree dry-joint systems from 2005–2010.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhat is the difference between the dry-joint gasket references included in this kit and standard-cooling versions?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThis kit supplies closed-cooling block-off gaskets (references 27-864549A02 \/ 27-864549A1) along with full-flow gaskets (references 27-864547A02 \/ 27-864547A1). Standard-cooling restrictor versions use a different gasket configuration and are not covered by this closed-cooling kit.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171572310067,"sku":"24MFK130-1GK","price":57.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-5237dfb56e10f63d.png?v=1792750038"},{"product_id":"27-33395-closed-cooling-exhaust-gasket-kit-for-mercruiser-dry-joint","title":"27-33395 Closed Cooling Exhaust Gasket Kit for MerCruiser Dry Joint","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eClosed Cooling Exhaust Manifold Gasket Repair Kit for MerCruiser Dry Joint GM V8 S.B.\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust manifold gasket repair kit is configured for MerCruiser Stern \/ Out Drive GM V8 Small Block (S.B.) engines equipped with Dry Joint exhaust and closed cooling systems. It covers 2002–2004 (7-degree elbow configuration) and 2005–2010 (14-degree elbow configuration) applications, with primary OEM reference 27-33395 alongside additional MerCruiser reference numbers listed below.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Architecture\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry Joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eClosed Cooling\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAssociated Elbow Angle \u0026amp; Years\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e7 Degree (2002–2004 GM V8 S.B. Dry Joint) and 14 Degree (2005–2010 GM V8 S.B. Dry Joint)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis kit applies to MerCruiser Stern \/ Out Drive GM V8 S.B. engines configured with Dry Joint exhaust and closed cooling. Match your engine model year, Dry Joint interface, closed cooling plumbing, and elbow angle configuration against the entries below.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive GM V8 S.B. Dry Joint\u003c\/strong\u003e — Years: 2002–2004. Joint Configuration: Dry Joint. Cooling System: Closed Cooling. Associated Elbow Design Angle: 7 Degree.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive GM V8 S.B. Dry Joint\u003c\/strong\u003e — Years: 2005–2010. Joint Configuration: Dry Joint. Cooling System: Closed Cooling. Associated Elbow Design Angle: 14 Degree.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided as identification references for part selection and do not by themselves establish universal interchangeability or original equipment manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-33395, 864549A02, 864547A1 (listed together for this kit configuration as 27-33395+; 864549A02+; 864547A1+)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClosed cooling exhaust manifold gasket repair kit\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely shut down and cooled, and disconnect the battery or disable starting circuits to prevent accidental cranking during exhaust work.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDrain the appropriate cooling and exhaust passages as specified in your MerCruiser closed cooling service manual before loosening manifold or Dry Joint connections.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifolds and elbows during disassembly, and clean all mating surfaces thoroughly while protecting the sealing faces from scratches or gouges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new gaskets and seals against the Dry Joint and closed cooling passage layout on your engine to verify correct orientation before final assembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly according to the engine manufacturer's fastener sequence and specifications, inspect for coolant, water, or exhaust leaks during initial operation; shut down immediately and inspect if any leakage or abnormal temperature occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow do the 7-degree and 14-degree descriptions relate to this gasket kit?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe 7-degree and 14-degree ratings refer to the design angle of the mating MerCruiser Dry Joint exhaust elbows rather than an angle built into the flat gaskets themselves. This closed cooling kit covers GM V8 S.B. Dry Joint applications from 2002–2004 (7-degree elbow era) and 2005–2010 (14-degree elbow era).\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eIs this kit for standard raw-water cooling or closed cooling systems?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis kit is specifically designated as a Closed Cooling Exhaust Manifold Gasket Repair Kit for MerCruiser Dry Joint GM V8 S.B. engines (2002–2004 and 2005–2010).\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171572342835,"sku":"24MFK131-1GK","price":57.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-75dd664ae9cd0fd2.png?v=1792750049"},{"product_id":"27-99757-exhaust-manifold-to-head-gasket-set-for-mercruiser-4-3l-4-5l","title":"27-99757 Exhaust Manifold-to-Head Gasket Set for MerCruiser 4.3L 4.5L","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold-to-Cylinder Head Gasket Set, 2 Pieces\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece gasket set is used to seal the exhaust manifold-to-cylinder head joint on matching MerCruiser, Volvo Penta, and OMC Cobra stern drive applications, including listed V6 4.3L and 4.5L engines, referencing OEM part number 27-99757. These gaskets install between the exhaust manifold and cylinder head—not at the manifold-to-elbow or manifold-to-riser joint—and listed Dry Joint applications are distinguished by year group and exhaust configuration (2002–2004 7° and 2005–2010 14°).\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSealing Joint\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold-to-cylinder head joint (not for the manifold-to-elbow or manifold-to-riser joint)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eListed Dry Joint Exhaust Configurations\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e2002–2004 7° configuration; 2005–2010 14° configuration; 0M serial numbers \u0026amp; up (\"ALTERNATIVE\" listing)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket set is associated with MerCruiser Stern \/ Out Drive, OMC Cobra Stern \/ Out Drive, and Volvo Penta Stern \/ Out Drive applications, including V6 4.3L and 4.5L engines, as well as the specific GM and Chevy engine groups listed below. Select the gasket by the engine-specific part number, full serial number (especially for 0M serial-number boundaries), year group, and exhaust-system configuration rather than displacement alone.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive, OMC Cobra Stern \/ Out Drive, Volvo Penta Stern \/ Out Drive — V6 4.3L and 4.5L Applications\u003c\/strong\u003e — Applicable where the engine parts list specifies a matching exhaust manifold-to-cylinder head gasket reference number.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — Must match required OEM gasket part number and manifold-to-cylinder head joint position\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eGM 229 \/ 262 CID — MODEL 175-205 - V6\u003c\/strong\u003e — Years: 1983 - 0M SN#’s.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — Verify 1983 to 0M serial-number range and required gasket reference\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eChevy V6\u003c\/strong\u003e — Exhaust manifold-to-cylinder head sealing joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — Match exact engine model and required gasket part number\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eGM V6 \u0026amp; V8 S.B. Dry Joint (2002–2004)\u003c\/strong\u003e — Exhaust configuration: 7° (2002–2004).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — Dry Joint system, 2002–2004 7° configuration at the manifold-to-cylinder head joint\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eGM V6 \u0026amp; V8 S.B. Dry Joint (2005–2010)\u003c\/strong\u003e — Exhaust configuration: 14° (2005–2010).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — Dry Joint system, 2005–2010 14° configuration at the manifold-to-cylinder head joint\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eGM V6 \u0026amp; V8 S.B. — Dry Joint Exhaust Manifold \u0026amp; Elbow Gaskets Category\u003c\/strong\u003e — For the exhaust manifold-to-cylinder head joint within this category.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — For the manifold-to-cylinder head joint only; not for the manifold-to-elbow joint\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eGM V6\/V8 S.B. DRY JOINT “ALTERNATIVE”\u003c\/strong\u003e — Serial numbers: 0M SN#’s \u0026amp; UP.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — Dry Joint “ALTERNATIVE” configuration, 0M serial numbers and up\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser V6, GM 229 CID application; Application group: MODEL 175-205 — V6, GM 229\/262 CID (1983 - 0M SN#’s).\u003c\/li\u003e\n\u003cli\u003eMerCruiser V6, GM 262 CID application; Application group: MODEL 175-205 — V6, GM 229\/262 CID (1983 - 0M SN#’s).\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V6 S.B., 2002–2004, Dry Joint, 7°.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 S.B., 2002–2004, Dry Joint, 7°.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V6 S.B., 2005–2010, Dry Joint, 14°.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 S.B., 2005–2010, Dry Joint, 14°.\u003c\/li\u003e\n\u003cli\u003eMerCruiser, GM-based application, V6 S.B., Dry Joint Exhaust Manifold \u0026amp; Elbow Gaskets section.\u003c\/li\u003e\n\u003cli\u003eMerCruiser, GM-based application, V6 S.B., Dry Joint “Alternative,” 0M serial series and up.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not by themselves guarantee interchangeability across every engine configuration or indicate the manufacturer of this aftermarket set. Keep all prefixes, suffixes, and leading zeros when comparing your original part number.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99757, 99757, 8M0215011\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC \/ OMC Cobra Stern \/ Out Drive\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508630, 0778257, 0910157, 910157, 0915022, 0915025, 915025, 3852468, 3853412, 856116\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eVolvo Penta\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3853412, 841601, 856116\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCrusader\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e97498\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eYamaha Outboard\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eYSC-12190-00-AC\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra (Aftermarket)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-2909-9, 18-2909\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM (Aftermarket)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e32170, GLM32170\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory (Aftermarket)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61421, 9-61425\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOBR Red Rhino (Aftermarket)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMR-506\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eBARR (Aftermarket)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMC47-27-99757\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold-to-cylinder head gaskets (2 pieces)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust system to cool completely, shut off the battery switch, and secure the ignition to prevent accidental starting.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the weight of the exhaust manifold during removal and installation to avoid damaging mounting threads or mating surfaces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eRemove all old gasket material and clean both the cylinder head and exhaust manifold mating surfaces carefully without gouging the metal.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003ePosition the new gaskets at the exhaust manifold-to-cylinder head joint—do not install them at the manifold-to-elbow or manifold-to-riser joint—and verify port alignment.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eInstall and tighten the manifold fasteners in the sequence and to the specification given in your engine service manual; after starting, inspect for exhaust leaks and stop the engine immediately if any abnormal condition occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan these gaskets be used at the exhaust elbow or riser joint?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. These gaskets are specifically for the exhaust manifold-to-cylinder head sealing joint. The manifold-to-elbow or manifold-to-riser mounting gasket is a different component and should not be substituted at this joint.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow do the 7° and 14° notes apply to Dry Joint applications?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eIn the listed GM V6 \u0026amp; V8 S.B. Dry Joint application data, the 2002–2004 group corresponds to the 7° exhaust configuration and the 2005–2010 group corresponds to the 14° exhaust configuration, alongside a GM V6\/V8 S.B. Dry Joint “ALTERNATIVE” listing for 0M serial numbers and up.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171574603827,"sku":"24GK055*2","price":21.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-0a24da838871171b.png?v=1792750212"},{"product_id":"27-99777-2-rear-riser-open-exhaust-elbow-gasket-set-for-mercruiser","title":"27-99777-2 Rear Riser Open Exhaust Elbow Gasket Set for MerCruiser","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eRear Riser Open Exhaust Elbow Gasket Set (2 Pieces)\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece rear-riser open exhaust elbow gasket set seals the joint between the exhaust manifold and the exhaust elbow or adaptor on listed MerCruiser 4-cylinder, 6-cylinder, and V8 engines, referencing OEM number 27-99777-2. It is configured specifically for open-passage rear-riser joints and is distinct from the closed-cooling blocking-gasket configuration referenced under 27-92720 or GLM 32630.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Location\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold to exhaust elbow or adaptor (rear-riser exhaust assembly)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePassage Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eOpen gasket pattern\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExcluded Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eNot the closed-cooling blocking-gasket version referenced as MerCruiser 27-92720 \/ GLM 32630\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket set fits listed MerCruiser applications equipped with a rear-riser exhaust manifold-to-elbow or adaptor joint using the open-gasket pattern. Verify that your assembly requires the open passage rather than a blocking gasket; on 2.5L and 3.0L engines from 1983–1994, check the installed exhaust-joint configuration directly before ordering.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4-Cylinder and 6-Cylinder (except 120 hp)\u003c\/strong\u003e — Years: 1968–1982. Rear riser exhaust manifold to elbow or adaptor joint with open gasket pattern.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser All V8\u003c\/strong\u003e — Years: 1978–1982. Rear riser exhaust manifold to elbow or adaptor joint with open gasket pattern.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 140\u003c\/strong\u003e — Inline 4, GM 181 CID, 4-Cylinder. Years: 1968–1982. Rear riser exhaust manifold to elbow or adaptor joint with open gasket pattern.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 120 \/ 140\u003c\/strong\u003e — Inline 4, 153 \/ 181 CID, 4-Cylinder. Years: 1982–1995. Rear riser exhaust manifold to elbow or adaptor joint with open gasket pattern.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 3.0L \/ 3.0LX\u003c\/strong\u003e — Inline 4, GM 181 CID, 4-Cylinder. Years: 1990 and up. Rear riser exhaust manifold to elbow or adaptor joint with open gasket pattern.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 2.5L\u003c\/strong\u003e — Years: 1983–1994. Rear riser exhaust manifold to elbow or adaptor joint; confirm installed open-gasket exhaust-joint configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.0L\u003c\/strong\u003e — Years: 1983–1994. Rear riser exhaust manifold to elbow or adaptor joint; confirm installed open-gasket exhaust-joint configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003cdiv style=\"margin:18px 0 0;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 120 hp (within 1968–1982 4\/6-Cylinder group)\u003c\/strong\u003e — Excluded from the 1968–1982 4\/6-Cylinder application range.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eClosed-Cooling Blocking-Gasket Assemblies (MerCruiser 27-92720 \/ GLM 32630)\u003c\/strong\u003e — Assemblies requiring a blocking gasket rather than an open passage gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/div\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 1968–1982; except 120 HP; rear-riser open gasket at the exhaust manifold-to-elbow or adaptor joint.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1968–1982; except 120 HP; rear-riser open gasket at the exhaust manifold-to-elbow or adaptor joint.\u003c\/li\u003e\n\u003cli\u003eMerCruiser all V8 applications, 1978–1982; rear-riser open gasket; specific V8 models are not individually identified.\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 3.0LX, from 1990 onward; inline 4, GM 181 CID; confirm rear-riser open-gasket exhaust configuration.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 2.5L application, 1983–1994; exhaust manifold gasket set application; confirm rear-riser open-gasket joint. Cylinder configuration and model code not specified.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 3.0L application, 1983–1994; exhaust manifold gasket set application; confirm rear-riser open-gasket joint. Cylinder configuration not specified in this sales-note statement.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1968; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1969; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1970; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1971; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1972; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1973; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1974; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1975; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1976; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1977; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1978; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1979; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1980; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1981; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4-cylinder applications, 120 HP, 1982; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 120 HP, 1968; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 120 HP, 1969; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 120 HP, 1970; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 120 HP, 1971; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 120 HP, 1972; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1973; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1974; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1975; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1976; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1977; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1978; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1979; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1980; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1981; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder applications, 1982; Excluded: 1968–1982 4\/6-cylinder applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not alone guarantee interchangeability across different joint configurations or indicate manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99777-2, 27-997772, 27-99777Q02, 99777Q02, 997771, 99777B2, 27-997771, 27-99777B2, 27-52076, 52076\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMercury Mariner Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99777\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508615\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Aftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-2833, 18-2833-9\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Aftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM31520, 31520\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eRECMAR Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eREC27-99777Q02\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDifferent Configuration Comparison (Not Interchangeable)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser 27-92720, GLM 32630 (Closed-cooling blocking-gasket version; not replaceable by this open gasket)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Rear-riser open exhaust elbow gaskets\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is shut off, completely cool, and secured against accidental starting before servicing any exhaust components.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow or adaptor during disassembly and carefully clean both mating surfaces on the manifold and elbow\/adaptor without gouging the sealing planes.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new open gasket directly against the removed gasket and the casting passages to verify that an open-passage pattern is required rather than a blocking gasket.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003ePosition the gasket and tighten the mounting fasteners according to the sequence and specifications in your engine service manual. If any abnormal leakage or temperature issue occurs during operation, shut down the engine immediately and inspect the joint.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan this gasket replace MerCruiser 27-92720 or GLM 32630?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. This set provides the open-gasket pattern associated with MerCruiser 27-99777-2 and GLM 31520. It is not a substitute for the closed-cooling blocking-gasket version referenced as MerCruiser 27-92720 or GLM 32630.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does this apply to 120 hp and 140 hp 4-cylinder models?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eWithin the 1968–1982 4\/6-cylinder group, 120 hp models are excluded while Model 140 (GM 181 CID) is included. For the later 1982–1995 inline 4 range (153\/181 CID), both Model 120 and Model 140 are listed when equipped with the rear-riser open-gasket manifold-to-elbow or adaptor joint.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171575029811,"sku":"24GK061*2","price":14.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-4bb16baa9ffc975d.png?v=1792750255"},{"product_id":"27-92720-rear-riser-closed-cooling-manifold-gasket-for-mercruiser-i4","title":"27-92720 Rear-Riser Closed-Cooling Manifold Gasket for MerCruiser I4","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold-to-Elbow Gasket — Rear Riser, Closed Cooling\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust manifold-to-elbow or adaptor gasket (referenced to OEM 27-92720) seals the rear-riser joint on specified MerCruiser Inline 4 engines (Model 120\/140 and 3.0L\/3.0LX series) equipped with closed cooling. It is a single service gasket for the manifold-to-elbow or adaptor connection, not a complete manifold, elbow assembly, or multi-part kit.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eInstallation Joint\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold to elbow or adaptor joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eRiser Position\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRear riser\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eClosed cooling (including 1968–1982 closed-cooling manifold-to-elbow or adaptor applications)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket fits specified MerCruiser Stern \/ Out Drive Inline 4 applications configured with a rear riser and closed cooling. Do not select the gasket by engine model or year alone; verify your required service part number, joint type (manifold to elbow or adaptor), and closed-cooling setup before ordering.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive — Rear Riser Exhaust Manifold to Elbow or Adaptor (1968–1982)\u003c\/strong\u003e\u003cbr\u003e\n Configuration: Rear riser, closed cooling; for exhaust manifold-to-elbow or manifold-to-adaptor joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive — Model 140 (1968–1982)\u003c\/strong\u003e\u003cbr\u003e\n Engine: Inline 4, GM 181 CID, 4-cylinder. Configuration: Rear riser, closed cooling; exhaust manifold-to-elbow or adaptor joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive — Model 120\/140 (1982–1995)\u003c\/strong\u003e\u003cbr\u003e\n Engine: Inline 4, 153\/181 CID, 4-cylinder. Configuration: Rear riser, closed cooling (verify closed-cooling manifold-to-elbow or adaptor requirement against your specific installation).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive — Model 3.0LX\/3.0L (1990 \u0026amp; Up)\u003c\/strong\u003e\u003cbr\u003e\n Engine: Inline 4, GM 181 CID, 4-cylinder. Configuration: Rear riser, closed cooling (verify closed-cooling manifold-to-elbow or adaptor requirement against your specific installation).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are public references for part identification and cross-checking; they do not independently guarantee interchangeability across different cooling setups or indicate manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive OEM Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-92720, 92720\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Marine Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0954\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory Marine Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61415\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e32630\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDifferent Configuration Reference (Not This Item)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser 27-99777-2 \/ GLM 31520 (Rear-riser open-gasket option)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003cstrong\u003eConfiguration Distinction:\u003c\/strong\u003e GLM 32630 \/ OEM 27-92720 is identified as the rear-riser closed-cooling gasket option. If your rear-riser assembly requires the open-gasket option, refer to GLM 31520 \/ OEM 27-99777-2 instead.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold-to-elbow or adaptor gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely shut down and cool, and take precautions to prevent accidental starting before disassembling any exhaust components.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow or adaptor during removal and installation to prevent strain or damage to mating surfaces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean and inspect the mating flange surfaces of the exhaust manifold and the elbow or adaptor, ensuring old gasket material is removed without gouging the sealing faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eVerify that this closed-cooling rear-riser gasket matches the passage layout required at your manifold-to-elbow or adaptor joint before final assembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly according to the engine manufacturer's manual, monitor the joint during initial operation; shut down immediately and inspect if any exhaust or fluid leaks or abnormal temperatures occur.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does OEM 27-92720 (GLM 32630) differ from OEM 27-99777-2 (GLM 31520)?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eBoth apply to rear-riser setups on specified MerCruiser Inline 4 engines, but they serve different cooling configurations. OEM 27-92720 \/ GLM 32630 (this product) is the closed-cooling gasket for the manifold-to-elbow or adaptor joint, whereas OEM 27-99777-2 \/ GLM 31520 is the open-gasket option.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhere is this gasket installed on the exhaust assembly?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eIt installs at the exhaust manifold-to-elbow joint or exhaust manifold-to-adaptor joint on rear-riser closed-cooling installations.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171575619635,"sku":"3557","price":11.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-f03392a7d93180f9.png?v=1792750267"},{"product_id":"27-8637251-closed-riser-gasket-set-2-pcs-for-mercruiser-v6-v8","title":"27-8637251 Closed Riser Gasket Set (2 Pcs) for MerCruiser V6 \u0026 V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold Elbow Riser Gasket Set (2 Pieces) — Closed \/ Block-Off Cooling Configuration\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece exhaust manifold-to-elbow\/riser gasket set (referencing MerCruiser 27-8637251) is designed for specified MerCruiser GM V6 and V8 stern drive and inboard engines with center-riser exhaust manifolds and closed (fresh water) cooling systems. It applies to wet-joint center-riser arrangements from 1981 or 1983 depending on engine family, as well as GM V6 and V8 Small Block Dry Joint \"Alternative\" systems (0M serial numbers and up); it is not the open-flow or restricted-flow gasket version.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Position\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold to elbow \/ riser (center-exit \/ center-riser manifold configuration)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFlow \/ Cooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eClosed (block-off) configuration for MerCruiser closed \/ fresh water cooling systems\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint Compatibility\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eConventional Wet Joint center-riser systems and GM V6 \/ V8 Small Block Dry Joint \"Alternative\" replacement systems\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eApplies to MerCruiser GM-based V6 and V8 stern drive (rear transmission) and inboard engines equipped with center-exit exhaust manifolds and the MerCruiser closed (fresh water) cooling system. Match the engine family, serial number range, cooling-system gasket position, and whether the installed exhaust is a conventional wet-joint center-riser or a Dry Joint \"Alternative\" system before ordering.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 175–205 (GM V6, 229 \/ 262 CID)\u003c\/strong\u003e — Years: 1983 to 0M serial numbers. Exhaust configuration: Center Riser, Wet Joint. Cooling configuration: Closed (Fresh Water Cooling).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 200–320 (GM V8 Small Block, 305 \/ 350 \/ 377 CID)\u003c\/strong\u003e — Years: 1983 to 0M serial numbers. Exhaust configuration: Center Riser, Wet Joint. Cooling configuration: Closed (Fresh Water Cooling).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 330–370 (GM V8 Big Block, 454 \/ 502 CID)\u003c\/strong\u003e — Years: 1981 and up. Exhaust configuration: Center Riser, Wet Joint. Cooling configuration: Closed (Fresh Water Cooling).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \/ V8 Small Block — Dry Joint \"Alternative\" System\u003c\/strong\u003e — Serial numbers: 0M and up. Exhaust configuration: Center Riser, Dry Joint \"Alternative\" replacement system using the specified fresh-water-cooling closed gasket position.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong\u003eOpen-flow or restricted-flow joint positions:\u003c\/strong\u003e This is the closed (block-off) gasket version for fresh water cooling; do not install in positions requiring open\/full-flow or restrictor water-passage gaskets.\u003c\/p\u003e\n \u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eStandard OEM Dry Joint systems outside the \"Alternative\" configuration:\u003c\/strong\u003e Not a universal fit for every OEM dry-joint exhaust system. Do not select this gasket solely because an engine has a dry-joint exhaust manifold.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser MODEL 175-205 — GM V6, 229 CID, Wet Joint, Center Riser, Closed \/ Fresh Water Cooling; Year \/ serial number condition “1983 - 0M SN#’s.”\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 175-205 — GM V6, 262 CID, Wet Joint, Center Riser, Closed \/ Fresh Water Cooling; Year \/ serial number condition “1983 - 0M SN#’s.”\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 200-320 — GM V8 Small Block, 305 CID, Wet Joint, Center Riser, Closed \/ Fresh Water Cooling; Year \/ serial number condition “1983 - 0M SN#’s.”\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 200-320 — GM V8 Small Block, 350 CID, Wet Joint, Center Riser, Closed \/ Fresh Water Cooling; Year \/ serial number condition “1983 - 0M SN#’s.”\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 200-320 — GM V8 Small Block, 377 CID, Wet Joint, Center Riser, Closed \/ Fresh Water Cooling; Year \/ serial number condition “1983 - 0M SN#’s.”\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 330-370 — GM V8 Big Block, 454 CID, Wet Joint, Center Riser, Closed \/ Fresh Water Cooling; from 1981 onward,\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 330-370 — GM V8 Big Block, 502 CID, Wet Joint, Center Riser, Closed \/ Fresh Water Cooling; from 1981 onward,\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V6 — Dry Joint “Alternative”, Fresh Water Cooling gasket position; serial condition “0M SN#’s \u0026amp; UP.”\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 Small Block — Dry Joint “Alternative”, Fresh Water Cooling gasket position; serial condition “0M SN#’s \u0026amp; UP.”\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM-manufactured V6 inboard engines with center-exit exhaust manifolds and MerCruiser closed cooling.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM-manufactured V8 inboard engines with center-exit exhaust manifolds and MerCruiser closed cooling.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM-manufactured V6, application described as “rear transmissions,” with center-exit exhaust manifolds and MerCruiser closed cooling.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM-manufactured V8, application described as “rear transmissions,” with center-exit exhaust manifolds and MerCruiser closed cooling.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not imply manufacturer identity or guaranteed interchangeability across different cooling configurations.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e8637251, 27-8637251, 863725, 27-863725, 860231, 27-860231, 41811, 27-41811, 87918, 87918A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMercury Mariner\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-863725, 27-860231, 27-41811\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0502988, 0508715\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0672, 18-0672-9\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e30220\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61422\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e8503-GB, MC-47-27-41811\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust Manifold Elbow \/ Riser Gasket (Closed \/ Fresh Water Cooling configuration)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eShut off the engine, allow the exhaust system to cool completely, and disconnect the battery or disable ignition to prevent accidental starting.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDrain the cooling passages in the exhaust manifold and elbow\/riser according to the engine service manual before loosening joint fasteners, and support heavy exhaust components during removal.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eRemove all old gasket material and inspect both the manifold and elbow\/riser mating surfaces for flatness, corrosion, or pitting while protecting the sealing surfaces from gouges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eVerify that the closed (block-off) gasket matches the required cooling circuit position for your closed-cooling system before reassembling and tightening fasteners to the factory specification.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter installation, run the engine with proper cooling water supply and inspect the manifold-to-riser joint for coolant, water, or exhaust leaks; stop the engine immediately and inspect if any leakage or abnormal temperature occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan this gasket be used on open-flow or restricted-flow manifold-to-elbow joints?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. This gasket is the closed (block-off) version for specified MerCruiser closed (fresh water) cooling applications. Open-flow and restricted-flow gaskets have different water-passage cutouts and are identified under separate part numbers.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this fit all MerCruiser Dry Joint exhaust manifolds?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. For dry-joint systems, this gasket applies only to the GM V6 and V8 Small Block Dry Joint \"Alternative\" replacement system (0M serial numbers and up) where this specific fresh-water-cooling closed gasket is required. It is not a universal fit for original OEM dry-joint manifolds.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171576307763,"sku":"23GT297*2","price":16.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-28aaf6cea101517e.png?v=1792750277"},{"product_id":"27-863726-full-flow-exhaust-elbow-gasket-2-pack-for-mercruiser-v6-v8","title":"27-863726 Full-Flow Exhaust Elbow Gasket (2-Pack) for MerCruiser V6 V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eFull-Flow Exhaust Elbow Gasket Pack (2 Pieces) for MerCruiser Wet-Joint and Dry-Joint Alternative Connections\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece full-flow (open) gasket pack seals the exhaust manifold, elbow, and spacer connections on specified MerCruiser GM V6, V8 small-block, and V8 big-block applications, referenced to MerCruiser 27-863726. It fits listed wet-joint exhaust assemblies within their original year and serial-number limits, as well as GM V6 and V8 small-block engines (0M serial numbers and up) equipped with a Dry Joint “Alternative” replacement system.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eWater-Passage Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eFull Flow (open center-riser configuration)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eConnection Position\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold, elbow, and spacer joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Compatibility\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eSpecified Wet Joint systems; GM V6\/V8 small-block Dry Joint “Alternative” wet-joint replacement systems (0M serial numbers \u0026amp; up)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eProduct Scope\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGasket pack only (not an exhaust manifold or elbow assembly; not a universal gasket for every wet-joint or dry-joint connection)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis full-flow gasket is used on the MerCruiser GM V6 and V8 manifold, elbow, and spacer applications below. Verify your engine serial-number range, joint style, and water-passage layout against the existing exhaust hardware; for 0M-and-up small-block engines, confirm that the Dry Joint “Alternative” wet-joint replacement system is installed.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 175–205 (V6, GM 229 \/ 262 CID)\u003c\/strong\u003e — Years: 1983 through 0M serial numbers. Joint configuration: Wet Joint. Flow configuration: Full Flow (open). Position: Exhaust manifold, elbow, and spacer connection.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 200–320 (V8 Small Block, GM 305 \/ 350 \/ 377 CID)\u003c\/strong\u003e — Years: 1983 through 0M serial numbers. Joint configuration: Wet Joint. Flow configuration: Full Flow (open). Position: Exhaust manifold, elbow, and spacer connection.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 330–370 (V8 Big Block, GM 454 \/ 502 CID)\u003c\/strong\u003e — Years: 1981 \u0026amp; up. Joint configuration: Wet Joint. Flow configuration: Full Flow (open). Position: Exhaust manifold, elbow, and spacer connection.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \/ V8 Small Block — Dry Joint “Alternative” System\u003c\/strong\u003e — Serial range: 0M serial numbers \u0026amp; up. Joint configuration: Dry Joint “Alternative” wet-joint replacement system only. Flow configuration: Full Flow (open). Position: Exhaust manifold and spacer connection.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3 style=\"margin:18px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eApplication Check Required\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMercury Mariner \/ MerCruiser — 200 (DFI \/ EFI), 200 PRO XS, 225 (EFI \/ DFI), 225 SEAPRO, 250 (DFI \/ EFI), 3.0L\u003c\/strong\u003e — These model designations appear in supplemental product notes without joint-configuration or manifold\/spacer details. Match by OEM part number and physical gasket port layout before selecting for these engines.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eConfirm application\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser MODEL 175-205, GM V6, 229 CID, WET JOINT; 1983 — 0M SN#’s.\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 175-205, GM V6, 262 CID, WET JOINT; 1983 — 0M SN#’s.\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 200-320, GM V8 Small Block, 305 CID, WET JOINT; 1983 — 0M SN#’s.\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 200-320, GM V8 Small Block, 350 CID, WET JOINT; 1983 — 0M SN#’s.\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 200-320, GM V8 Small Block, 377 CID, WET JOINT; 1983 — 0M SN#’s.\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 330-370, GM V8 Big Block, 454 CID, WET JOINT; from 1981 onward, ending year not specified.\u003c\/li\u003e\n\u003cli\u003eMerCruiser MODEL 330-370, GM V8 Big Block, 502 CID, WET JOINT; from 1981 onward, ending year not specified.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V6, Dry Joint “Alternative” replacement system using wet-joint manifold and spacer connections; 0M SN#’s \u0026amp; UP.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 Small Block, Dry Joint “Alternative” replacement system using wet-joint manifold and spacer connections; 0M SN#’s \u0026amp; UP.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference. They do not imply that this aftermarket gasket pack is manufactured by the referenced OEM brands, nor do they make different water-passage configurations interchangeable on the same engine.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-863726, 27-818832, 27-860232, 27-871051, 27-87105, 27-87105-1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional Short \/ Base Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e863726, 818832, 860232, 871051, 87105\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508606\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Reference (Full Flow \/ Open)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM 32080, Mallory 9-61414, Sierra 18-2849-1, Sierra 18-2849-9-1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Flow Configurations (For Comparison Only — Not Interchangeable)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM 30240 (Restricted water-passage version); GLM 30220 (Closed \/ Block-off version)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003cstrong\u003eConfiguration Distinction:\u003c\/strong\u003e GLM 32080 is the open (full-flow) center-riser gasket corresponding to this item. GLM 30240 (restricted) and GLM 30220 (closed) serve different water-routing setups on similar engine blocks and are not interchangeable with this full-flow gasket.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Full-flow exhaust elbow \/ manifold \/ spacer gaskets\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eShut down the engine, disconnect the battery to prevent accidental cranking, and allow the exhaust manifolds, elbows, and spacers to cool completely before disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust elbows and spacers during removal so hardware and cast mating surfaces are not strained or damaged.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean old gasket material from the manifold, spacer, and elbow sealing faces, and inspect the surfaces for corrosion, pitting, or warpage without gouging the metal.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new full-flow gasket ports directly against the removed gasket and the mating water passages. Do not substitute a full-flow (open) gasket in a joint that requires a restrictor or block-off gasket.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eReassemble and tighten fasteners according to the sequence and specifications in your engine service manual. After installation, inspect the exhaust and cooling joint for exhaust or water leaks under normal water supply; shut down immediately and inspect if any leakage or abnormal temperature occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does this gasket differ from GLM 30240 and GLM 30220?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThis gasket corresponds to GLM 32080 (and MerCruiser 27-863726), which is the full-flow (open) center-riser gasket. GLM 30240 is the restricted water-passage version and GLM 30220 is the closed (block-off) version. Even when listed for the same GM V6 or V8 engine family, the three versions serve different cooling passage positions and cannot be used in place of one another.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this gasket fit factory MerCruiser Dry-Joint manifolds?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. This is a wet-joint style gasket. For 0M-and-up GM V6 and V8 small-block engines, it only applies when the engine has been fitted with the Dry Joint “Alternative” wet-joint replacement exhaust system.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171576471603,"sku":"23GT296*2","price":11.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-3e4e1c75f5373431.png?v=1792750288"},{"product_id":"27-18272-exhaust-elbow-riser-gasket-2-pack-for-mercruiser-3-7l-4-cyl","title":"27-18272 Exhaust Elbow Riser Gasket 2-Pack for MerCruiser 3.7L 4-Cyl","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eManifold Riser Gasket Pack for MerCruiser 3.7L and 4-Cylinder Exhaust Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece replacement sealing gasket pack (referencing MerCruiser OEM 27-18272) services the exhaust elbow and manifold riser mounting joint on compatible MerCruiser 4-cylinder engines. Application eligibility depends on whether the engine is equipped with an aluminum manifold (1985–1989 3.7L 170\/470) or a cast-iron manifold (excluding 1976–1982 470 models).\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eCast-iron and aluminum manifold versions must not be selected by engine displacement, cylinder count, or model number alone. Check whether your exhaust manifold is cast iron or aluminum and verify the gasket reference number before ordering.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.7L 4-Cylinder (Models 170 \/ 470)\u003c\/strong\u003e — 1985–1989. Requires aluminum exhaust manifold configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4-Cylinder Engines\u003c\/strong\u003e — Requires cast-iron exhaust manifold configuration. Excludes 1976–1982 model 470.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.7L \u0026amp; 3.7LX MCM (Models 165, 170, 180, 190, 470, 485, 488)\u003c\/strong\u003e — 224 CID, 4-cylinder, 1980–1989 manifold, elbow, end-cap, and gasket service family. Must match the specific cast-iron or aluminum manifold requirements and exclusion years listed above.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3 style=\"margin:18px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 470 (4-Cylinder with Cast-Iron Manifold)\u003c\/strong\u003e — 1976–1982.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\u003cli\u003eMerCruiser 3.7L MCM, 224 CID, four-cylinder, listed within the 1980–1989 manifold\/elbow application group.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThese part numbers are provided as identification references and do not by themselves guarantee interchangeability across different manifold configurations or indicate original manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-18272, 27-97863, 18272, 97863\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC OEM Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508753\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Aftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e32470, GLM32470\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61412\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Aftermarket Gasket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0881, 18-0881-1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional Sierra Cross-Listing Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-8530, 18-1937\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust elbow \/ manifold riser mounting gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely shut off, cooled down, and secured against accidental starting before loosening any exhaust components.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow or riser assembly during removal and reinstallation to prevent strain on mating joints or adjacent connections.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean old gasket material from the manifold and elbow mating surfaces carefully, protecting the sealing planes from gouges or scratches, especially on aluminum manifolds.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new gasket profile and port openings directly against both the manifold and riser mating surfaces before final assembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eTighten mounting fasteners according to the sequence and specifications in your engine service manual, and stop operation immediately to inspect the joint if any exhaust or sealing abnormality is observed.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan I select this gasket solely because my engine is a MerCruiser 3.7L or 470?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. On MerCruiser 4-cylinder engines (including the 224 CID 3.7L and 3.7LX series across models 165, 170, 180, 190, 470, 485, and 488), eligibility depends on the exhaust manifold material and year. This gasket fits 1985–1989 3.7L 170\/470 engines with an aluminum manifold, as well as 4-cylinder engines with a cast-iron manifold except the 1976–1982 470.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow many gaskets are included in this listing?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis listing supplies a two-piece pack containing 2 exhaust elbow \/ manifold riser mounting gaskets.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171576537139,"sku":"23GT302*2","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-7654636985a39dde.png?v=1792750300"},{"product_id":"27-864850a02-dry-joint-restrictor-elbow-gasket-set-for-mercruiser","title":"27-864850A02 Dry Joint Restrictor Elbow Gasket Set for MerCruiser","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eDry-Joint Exhaust Elbow Restrictor Gasket Set (2 Pieces) for MerCruiser Standard Cooling\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece set of restrictor-type dry joint exhaust elbow gaskets (referencing OEM 27-864850A02) fits MerCruiser GM V6 and V8 small-block engines (4.3L, 5.0L, 5.7L, and 6.2L) equipped with standard cooling and a dry joint standard manifold and riser, including 2002–2004 7° and 2005–2010 14° elbow configurations.\u003c\/p\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis is the Restrictor flow version for standard cooling systems; it is not the Full Flow (Open) or Block Off (Closed) dry joint gasket version.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Style\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry Joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFlow Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRestrictor (Restricted flow — not Full Flow \/ Open or Block Off \/ Closed)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eStandard Cooling\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAssociated Elbow Angle \u0026amp; Years\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e7° dry joint elbow design (2002–2004); 14° dry joint elbow design (2005–2010)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eSelect this gasket set by verifying the required gasket flow style (Restrictor vs. Full Flow or Block Off), cooling system, and dry joint manifold\/riser configuration—not by engine displacement alone.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 Small Block (2002–2004)\u003c\/strong\u003e — Dry Joint system with 7° exhaust elbow design. Requires Restrictor elbow gasket and Standard Cooling configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 Small Block (2005–2010)\u003c\/strong\u003e — Dry Joint system with 14° exhaust elbow design. Requires Restrictor elbow gasket and Standard Cooling configuration.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4.3L, 5.0L, 5.7L, and 6.2L (GM V6 \u0026amp; V8 Small Block)\u003c\/strong\u003e — Applications utilizing the Dry Joint Standard Manifold and Riser with Standard Cooling and a Restrictor-type exhaust elbow gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser GM V8 S.B., 2002–2004, Dry Joint, 7° elbow, Standard Cooling, Restrictor gasket.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 S.B., 2005–2010, Dry Joint, 14° elbow, Standard Cooling, Restrictor gasket.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and configuration comparison only. They do not alone guarantee direct interchangeability or indicate that this aftermarket set is made by an original equipment manufacturer.\u003c\/p\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eRestrictor Version References (This Product Configuration)\u003c\/h3\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;margin:0 0 24px;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e864850A02, 27-864850A02, 27-864850A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM (Aftermarket Reference)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e37900 (Restrictor version)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra (Aftermarket Reference)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0722 (Restricted version)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eOther Flow Configurations \u0026amp; Unverified Comparison Numbers (Not This Product)\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eDry joint exhaust systems use different gasket flow plates depending on the cooling layout. The numbers below identify alternative configurations or additional reference listings and are not interchangeable with the Restrictor gasket set:\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFull Flow \/ Open Version (For Comparison Only)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM 37910; Sierra 18-0721\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eBlock Off \/ Closed Version (For Comparison Only)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM 37920; Sierra 18-0720\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther MerCruiser Reference Listings (Confirm Exact Configuration)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-864547A1, 27-864547A02, 864547A1, 27-864549A02, 27-864549A1, 27-99757, 27-33395\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Restrictor-type dry joint exhaust elbow gaskets\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely cool, shut off the ignition, and disconnect the battery to prevent accidental starting before servicing the exhaust elbow joint.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the weight of the exhaust elbow\/riser during removal and installation, and protect the machined dry joint mating surfaces on both the manifold and elbow from scratches or gouges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the water passage slots on the new Restrictor gasket against the removed gasket and the engine service manual. Do not substitute a Full Flow (Open) or Block Off (Closed) gasket where a Restrictor gasket is specified.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eFollow your engine manufacturer's service manual for fastener tightening sequence, torque specifications, and post-installation leak checks. Stop operation immediately and inspect the joint if any exhaust or cooling water leak is observed.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow do the Restrictor, Full Flow, and Block Off dry joint gaskets differ by reference number?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis set is the Restrictor (Restricted) version, which corresponds to MerCruiser 27-864850A02 \/ 864850A02 \/ 27-864850A1, GLM 37900, and Sierra 18-0722. In contrast, the Full Flow (Open) version is identified by GLM 37910 and Sierra 18-0721, while the Block Off (Closed) version is identified by GLM 37920 and Sierra 18-0720.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this gasket set fit both 7° and 14° dry joint exhaust elbows?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eYes, when the engine uses a standard cooling system that calls for a Restrictor elbow gasket, this set fits MerCruiser GM V6 and V8 small-block dry joint applications with 7° elbows (2002–2004) as well as 14° elbows (2005–2010).\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171576963123,"sku":"24GK048*2","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-223e4e7e5e87ea56.png?v=1792750333"},{"product_id":"27-864547a02-full-flow-dry-joint-elbow-gasket-set-for-mercruiser","title":"27-864547A02 Full Flow Dry-Joint Elbow Gasket Set for MerCruiser","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eFull Flow Dry-Joint Exhaust Elbow Gasket Set — 2 Pieces\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece set of Full Flow dry-joint exhaust elbow gaskets (referencing MerCruiser 27-864547A02) services compatible MerCruiser GM V6 and small-block V8 (4.3L, 5.0L, 5.7L, and 6.2L) exhaust manifold, riser, and elbow connections from 2002 onward.\u003c\/p\u003e\n \u003cp style=\"margin:0;\"\u003eIt is designed specifically for dry-joint open manifold and riser connections requiring the Full Flow gasket version—covering 2002–2004 7° and 2005–2010 14° dry-joint configurations—and is distinct from the Restrictor and Block Off gasket versions.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry Joint (Open Manifold and Riser)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFlow Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eFull Flow (distinct from Restrictor and Block Off versions)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eConnection Position\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold, riser, or elbow connection\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eListed Dry-Joint Angle Configurations\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e7° dry-joint configuration (2002–2004); 14° dry-joint configuration (2005–2010)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eMatch the required part number and gasket flow version at the specific manifold, riser, or elbow connection rather than selecting by engine displacement alone.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4.3L, 5.0L, 5.7L, and 6.2L\u003c\/strong\u003e — Applications utilizing the Dry Joint Open Manifold and Riser requiring the Full Flow gasket version.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 Small Block (S.B.)\u003c\/strong\u003e — Years: 2002–2004. Joint and angle configuration: Dry Joint - 7°. Flow configuration: Full Flow exhaust elbow gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 Small Block (S.B.)\u003c\/strong\u003e — Years: 2005–2010. Joint and angle configuration: Dry Joint - 14°. Flow configuration: Full Flow exhaust elbow gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser V6 \u0026amp; V8\u003c\/strong\u003e — Years: 2002 onward. Configuration: Dry Joint exhaust elbow connection with Full Flow gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"margin:18px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eConnections requiring Restrictor or Block Off gaskets\u003c\/strong\u003e — This set is the Full Flow version only and cannot substitute for Restrictor or Block Off gasket versions.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser GM V8 S.B., 2002–2004, Dry Joint, 7° exhaust, Full Flow gasket.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 S.B., 2005–2010, Dry Joint, 14° exhaust, Full Flow gasket.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003ePublic part numbers are listed for identification and cross-reference only; they do not imply that this aftermarket set is made by the original equipment manufacturer or that all listed numbers are interchangeable across different flow configurations.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Full Flow References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e864547A02, 27-864547A02, 27-864547A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Full Flow Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e37910\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Full Flow Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0721\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Dry-Joint Gasket References (Comparison Only — Not Confirmed Full Flow Equivalents)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser: 27-864850A02, 27-864549A02, 27-864549A1\u003cbr\u003eGLM: 37900, 37920\u003cbr\u003eSierra: 18-0720, 18-0722\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Full Flow dry-joint exhaust elbow gaskets\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eShut down the engine, allow the exhaust assembly to cool completely, and disconnect the battery to prevent accidental starting before disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust elbows or risers during removal, and clean both mating surfaces thoroughly while protecting the sealing faces from scratches or gouges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the water passage slots on the new Full Flow gaskets against the existing joint requirements; never substitute a Full Flow gasket where a Restrictor or Block Off gasket is specified by the engine manual.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003ePosition the gasket in the orientation specified by the OEM service manual, reassemble the dry-joint connection, and tighten fasteners to the manufacturer's specified sequence and torque.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly, inspect the joint during initial operation; if any exhaust or water leakage or abnormal temperature occurs, stop the engine immediately and inspect the connection.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan this gasket set replace Restrictor or Block Off dry-joint gaskets?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. This set contains only the Full Flow version (referencing MerCruiser 864547A02, 27-864547A02, 27-864547A1, GLM 37910, and Sierra 18-0721). Restrictor and Block Off gaskets are separate versions with different coolant passage openings.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this Full Flow gasket fit both 7° and 14° MerCruiser dry-joint elbows?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eYes, when the connection uses a Full Flow gasket on an open dry-joint manifold and riser, the listed applications include GM V6 and small-block V8 7° dry-joint configurations (2002–2004) and 14° dry-joint configurations (2005–2010).\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171576995891,"sku":"24GK047*2","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-402296455bbaba14.png?v=1792750345"},{"product_id":"27-864549a02-dry-joint-riser-block-off-gasket-set-for-mercruiser","title":"27-864549A02 Dry-Joint Riser Block-Off Gasket Set for MerCruiser","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eDry-Joint Exhaust Elbow\/Riser Block-Off Gasket Set — 2 Pieces\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece set of aftermarket dry-joint exhaust elbow\/riser block-off gaskets corresponds to MerCruiser reference 27-864549A02 for compatible closed-cooling applications on GM V6 and small-block V8 (4.3L, 5.0L, 5.7L, and 6.2L) engines. It is the block-off (closed) flow version used at dry-joint closed manifold and riser connections—including 2002–2004 7° and 2005–2010 14° dry-joint configurations—rather than the restrictor or full-flow (open) gasket versions.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry Joint exhaust elbow\/riser connection\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGasket Flow Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eBlock Off (Closed); distinct from Restrictor and Full Flow (Open) versions\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eClosed Cooling (utilizing Dry Joint closed manifold and riser)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAssociated Dry-Joint Elbow Configurations\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e7° dry-joint configuration (2002–2004 applications); 14° dry-joint configuration (2005–2010 applications)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eEngine displacement alone is not enough to choose the correct dry-joint gasket; verify your installed exhaust joint, closed-cooling layout, and block-off flow requirement against the applications below.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 Small Block (2002–2004)\u003c\/strong\u003e — Dry Joint 7° configuration; Block Off (Closed Cooling) exhaust elbow\/riser connection.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \u0026amp; V8 Small Block (2005–2010)\u003c\/strong\u003e — Dry Joint 14° configuration; Block Off (Closed Cooling) exhaust elbow\/riser connection.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser V6 \u0026amp; V8 Small Block (2002 onward)\u003c\/strong\u003e — Dry Joint configuration with Block Off (Closed Cooling).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4.3L, 5.0L, 5.7L \u0026amp; 6.2L\u003c\/strong\u003e — Engines utilizing the Dry Joint closed manifold and riser configuration with Block Off (Closed Cooling).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"margin:24px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eRestrictor or Full-Flow (Open) Dry-Joint Applications\u003c\/strong\u003e — This is the block-off\/closed gasket version and cannot be used where a restrictor or full-flow\/open gasket is required.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser GM V8 S.B., 2002–2004, Dry Joint 7°, Closed Cooling, Block Off.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 S.B., 2005–2010, Dry Joint 14°, Closed Cooling, Block Off.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 4.3L application, Dry Joint Closed Manifold and Riser, Closed Cooling, Block Off.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 5.0L application, Dry Joint Closed Manifold and Riser, Closed Cooling, Block Off.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 5.7L application, Dry Joint Closed Manifold and Riser, Closed Cooling, Block Off.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6.2L application, Dry Joint Closed Manifold and Riser, Closed Cooling, Block Off.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThese part numbers are provided for identification and cross-reference purposes only; they do not alone guarantee interchangeability across different flow configurations or indicate manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Block-Off References (This Gasket Version)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-864549A02, 864549A02, 27-864549A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Block-Off References (This Gasket Version)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM 37920, Sierra 18-0720\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional Associated \u0026amp; Other Configuration Reference Numbers (Compare Before Selecting)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser 27-864549, 27-864850A02, 27-864547A02, 864547A1, 27-99757, 27-33395; GLM 37900, 37910; Sierra 18-0721, 18-0722\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n Numbers listed under additional associated and other configuration references may correspond to alternate dry-joint flow styles (such as restrictor or full-flow\/open versions) or related exhaust gasket series. Do not treat them as direct substitutes for the 27-864549A02 block-off gasket without verifying your required passage layout.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Dry-joint exhaust elbow\/riser block-off gaskets\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eShut down the engine, allow all exhaust and cooling components to cool completely, and disconnect the battery to prevent accidental starting before disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow\/riser securely during removal, and clean both the dry-joint manifold and elbow mating surfaces thoroughly while protecting the machined sealing faces from gouges or scratches.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new block-off gaskets directly against the removed gaskets and the manifold\/riser cooling passages to verify that the closed\/block-off configuration matches the engine's closed-cooling layout.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eInstall the gaskets and tighten the elbow\/riser fasteners following the sequence and specifications in your engine service manual. After reassembly, inspect the joint during initial operation and shut down immediately if any exhaust or coolant leakage occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does this gasket differ from the restrictor and full-flow dry-joint gaskets?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eDry-joint MerCruiser exhaust systems use three distinct gasket functions: Block Off (Closed), Restrictor, and Full Flow (Open). This set is the Block Off (Closed) version corresponding to MerCruiser 27-864549A02 \/ 27-864549A1, GLM 37920, and Sierra 18-0720 for compatible closed-cooling manifold and riser connections.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this set apply to both 7° and 14° dry-joint elbow configurations?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eYes, when the engine uses a dry-joint closed manifold and riser requiring a block-off gasket. The listed GM V6 and small-block V8 applications cover 2002–2004 models with the 7° dry-joint configuration and 2005–2010 models with the 14° dry-joint configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171577454643,"sku":"24GK115*2","price":35.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-1e0b9a18855780c7.png?v=1792750366"},{"product_id":"dry-joint-exhaust-elbow-manifold-gasket-kit-for-mercruiser","title":"Dry-Joint Exhaust Elbow Manifold Gasket Kit for MerCruiser","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eManifold Gasket Kit for MerCruiser Dry-Joint Exhaust Elbow Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket manifold gasket kit is a combination associated with Mercury MerCruiser dry-joint exhaust elbow applications, referencing OEM combination 864547A02 + 864549A02 + 864850A02. The referenced gasket versions cover Full Flow \/ Open, Restrictor \/ Restricted, and Block Off \/ Closed configurations; select and install only the gasket version required by your manifold, riser, and cooling arrangement.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry-joint exhaust elbow interface\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eReferenced Passage Versions\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eFull Flow \/ Open, Restrictor \/ Restricted, and Block Off \/ Closed\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eAssociated with Mercury MerCruiser Stern \/ Out Drive dry-joint exhaust elbow applications. Individual gasket usage does not establish fitment of the complete combination at a single joint; verify the exact passage style (Full Flow \/ Open, Restrictor \/ Restricted, or Block Off \/ Closed) specified for your engine serial number, manifold, riser, and cooling system before installation.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMercury MerCruiser (Stern \/ Out Drive)\u003c\/strong\u003e — Dry-joint exhaust elbow applications. Referenced gasket versions include Full Flow \/ Open, Restrictor \/ Restricted, and Block Off \/ Closed; match the installed gasket version to the manifold, riser, and cooling arrangement.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser GM V6 S.B. DRY JOINT, Restrictor \/ Restricted gasket, Standard Cooling, 7° Dry Joint, 2002–2004; component-level application only.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 S.B. DRY JOINT, Restrictor \/ Restricted gasket, Standard Cooling, 7° Dry Joint, 2002–2004; component-level application only.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V6 S.B. DRY JOINT, Restrictor \/ Restricted gasket, Standard Cooling, 14° Dry Joint, 2005; component-level application only.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference. They represent the combined kit reference and the individual gasket numbers across the three passage configurations, and do not establish direct interchangeability between different flow versions or OEM manufacturer origin.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary Combination Reference (MerCruiser)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e864547A02 + 864549A02 + 864850A02\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive Individual References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-864547A02, 27-864547A1, 864547A02, 27-864549A02, 27-864549A1, 864549A02, 27-864850A02, 27-864850A1, 864850A02\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Combination Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0722 + 18-0721 + 18-0720\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Individual References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0722, 18-0721, 18-0720, 18-1843, 18-1842, 18-1845\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Individual References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e37900, 37910, 37920\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eManifold Gasket Kit\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely shut down and cool, and disconnect the battery to prevent accidental starting during exhaust service.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust elbows and risers securely during removal and installation, and protect the machined dry-joint sealing surfaces from scratches or gouges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eIdentify the exact gasket version required by your manifold, riser, and cooling arrangement (Full Flow \/ Open, Restrictor \/ Restricted, or Block Off \/ Closed). Do not substitute a Full Flow gasket where a Restrictor or Block Off gasket is specified.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean and inspect mating surfaces thoroughly, align the cooling and exhaust passages as specified in the factory service manual, and shut down the engine immediately to inspect if any abnormal temperature or leak occurs during initial operation.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow do the three gasket versions in this combination differ?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe combination references three dry-joint exhaust elbow gasket styles: Full Flow \/ Open, Restrictor \/ Restricted, and Block Off \/ Closed. Each version controls water passage flow differently between the manifold and elbow\/riser. Only the specific version required by your manifold, riser, and cooling arrangement should be installed at a given joint.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171577749555,"sku":"24GK048+24GK047+24GK115","price":56.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/c713b558d69e4970849fb99337711149d576dea23cec9110e43b889e953e1a08.png?v=1792808975"},{"product_id":"27-73866-exhaust-manifold-gasket-set-for-ford-302-351-v8-marine","title":"27-73866 Exhaust Manifold Gasket Set for Ford 302 \u0026 351 V8 Marine","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold Gasket Set (2 Pieces) for Ford 302 \u0026amp; 351 CID V8 Marine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece replacement exhaust manifold gasket set services the exhaust manifold joint on specified MerCruiser, Volvo Penta, and OMC marine engines built on Ford 302 CID (5.0 L) and 351 CID (5.8 L) V8 blocks, referencing OEM part number 27-73866. It applies to listed MerCruiser 215–255 and 888 models, Volvo Penta 5.0\/5.8 L and Fi\/FSi applications from 1993 onward, and OMC 5.0, 5.8, and 351 EFI applications from 1991 onward.\u003c\/p\u003e\n \u003cp style=\"margin:0;\"\u003eThis product is a gasket set only and does not include an exhaust manifold assembly.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eEngine displacement (5.0 L or 5.8 L) alone is not sufficient to identify the correct exhaust manifold gasket. Verify that your engine matches the Ford 302 or 351 CID V8 block configuration, full model designation (including MIE, Fi\/FSi, or 351 EFI where applicable), and the open-ended year ranges listed below.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 215, 225, 225MIE, 888\u003c\/strong\u003e — Ford 302 CID V8 (5.0 L) exhaust manifold applications.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified: Confirm Ford 302 CID V8 block and exact model designation\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 233, 233MIE, 255, 255MIE\u003c\/strong\u003e — Ford 351 CID V8 (5.8 L) exhaust manifold applications.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified: Confirm Ford 351 CID V8 block and exact model designation\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eVolvo Penta 5.0 L \/ 5.8 L \u0026amp; Fi \/ FSi\u003c\/strong\u003e — Ford 302 \/ 351 CID V8 applications; Years: 1993 onward.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified: Confirm Ford 302\/351 CID V8 block, 1993-onward production, and full Fi\/FSi designation\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eOMC 5.0, 5.8 \u0026amp; 351 EFI\u003c\/strong\u003e — Ford 302 \/ 351 CID V8 exhaust manifold applications; Years: 1991 onward.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified: Confirm Ford 302\/351 CID V8 block, 1991-onward production, and exact 5.0, 5.8, or 351 EFI model designation\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not by themselves guarantee interchangeability across every engine variation or indicate original manufacturer identity. Keep complete part numbers, including leading zeros and suffixes, when matching your existing gasket.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-73866, 27-54566, 73866, 54566\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eVolvo Penta Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3852455, 3853742, 0908717, 0916262\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3852455, 3853742, 908717, 916262, 0908717, 0916262\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePleasurecraft (PCM \/ Crusader) Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRM0007\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMallory 9-61420; Sierra 18-0183, 18-0183-1; GLM 33790\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cp style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003eNote on suffixes: Both Sierra 18-0183 and 18-0183-1 appear in references for this gasket profile, but do not assume they represent identical package or sub-version specifications without checking your exact part requirement.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold gasket — 2 pieces\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely cool and disconnected from starting power before beginning exhaust manifold service.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifolds properly during removal and installation to prevent fastener damage or personal injury.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean and inspect the cylinder head and exhaust manifold mating surfaces thoroughly, removing old gasket material and corrosion while protecting the sealing surfaces from gouges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the port layout and bolt hole pattern of the new gaskets directly against the cylinder head and manifold mating surfaces before assembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eFollow the engine manufacturer's service manual for fastener tightening sequence, torque specifications, and post-installation inspection. If any exhaust leak or abnormal temperature occurs during operation, shut down the engine immediately and inspect the joint.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this gasket set fit all MerCruiser, Volvo Penta, or OMC 5.0 L and 5.8 L engines?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. Marine 5.0 L and 5.8 L engines were produced on different base engine blocks depending on the year and manufacturer. This set applies only to the listed Ford 302 CID (5.0 L) and 351 CID (5.8 L) V8 applications—specifically MerCruiser 215, 225, 225MIE, 888, 233, 233MIE, 255, and 255MIE models; Volvo Penta 5.0\/5.8 L and Fi\/FSi Ford V8 models from 1993 onward; and OMC 5.0, 5.8, and 351 EFI Ford V8 models from 1991 onward.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow many gaskets are included in this listing?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThis set includes 2 exhaust manifold gaskets. It does not include exhaust manifolds, elbows, end caps, or mounting hardware.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171600850995,"sku":"24GK056*2","price":21.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-31aeb0d4291defa3_41489843-d7f6-4af2-9926-9b402bbf30a8.png?v=1792750625"},{"product_id":"27-99757-dry-joint-exhaust-manifold-gasket-kit-for-mercruiser-gm-v6","title":"27-99757 Dry-Joint Exhaust Manifold Gasket Kit for MerCruiser GM V6","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003cdiv style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eMerCruiser GM V6 Dry-Joint Exhaust Manifold Gasket Repair Kit — Standard Cooling\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis exhaust manifold gasket repair kit services MerCruiser GM V6 S.B. dry-joint exhaust systems configured for standard cooling, covering 2002–2004 setups with 7-degree dry-joint risers\/elbows and 2005–2010 setups with 14-degree dry-joint risers\/elbows. It brings together the manifold gaskets (reference 27-99757), both restricted-flow and full-flow dry-joint elbow gaskets (references 27-864850A02 and 27-864547A02), and drain plugs supplied with O-rings for V6 standard-cooling joint service.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint Design\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry-Joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eStandard Cooling\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAssociated Riser \/ Elbow Angle by Year\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e7-degree dry-joint riser\/elbow (2002–2004 configurations); 14-degree dry-joint riser\/elbow (2005–2010 configurations)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eIncluded Elbow Gasket Flow Patterns\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRestricted-flow (restrictor) and full-flow dry-joint elbow gaskets\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis kit is configured for the MerCruiser GM V6 S.B. dry-joint, standard-cooling applications listed below. Check the installed exhaust-joint design, engine year, cooling configuration, and riser\/elbow angle rather than relying on “V6” alone, and match the restrictor or full-flow elbow gasket to the required flow pattern and reference number for each joint.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 S.B. Dry Joint (2002–2004)\u003c\/strong\u003e — Standard cooling; configured for use with 7-degree dry-joint riser\/elbow assemblies.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 S.B. Dry Joint (2005–2010)\u003c\/strong\u003e — Standard cooling; configured for use with 14-degree dry-joint riser\/elbow assemblies.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThis is the V6 standard-cooling version. Do not select it as an interchangeable V8, wet-joint, or closed-cooling kit based only on a shared individual gasket or drain plug reference number.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are public identification references associated with the individual components in this kit. They are provided to assist with part identification and do not by themselves guarantee full-kit interchangeability or indicate OEM manufacturer status.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary Component OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99757, 864850A02, 864547A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Manifold Gasket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive:\u003c\/strong\u003e 27-99757\u003cbr\u003e\n \u003cstrong\u003eMercury Mariner:\u003c\/strong\u003e 27-99757\u003cbr\u003e\n \u003cstrong\u003eGLM:\u003c\/strong\u003e 32170\u003cbr\u003e\n \u003cstrong\u003eMallory:\u003c\/strong\u003e 9-61421\u003cbr\u003e\n \u003cstrong\u003eSierra:\u003c\/strong\u003e 18-2909-9\n \u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDry-Joint Elbow Gasket References (864850 Series)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive:\u003c\/strong\u003e 864850A02, 27-864850A02, 27-864850A1\u003cbr\u003e\n \u003cstrong\u003eGLM:\u003c\/strong\u003e 37900\u003cbr\u003e\n \u003cstrong\u003eSierra:\u003c\/strong\u003e 18-0722\n \u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDry-Joint Elbow Gasket References (864547 Series)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive:\u003c\/strong\u003e 864547A1, 864547A02, 27-864547A02, 27-864547A1\u003cbr\u003e\n \u003cstrong\u003eGLM:\u003c\/strong\u003e 37910\u003cbr\u003e\n \u003cstrong\u003eSierra:\u003c\/strong\u003e 18-0721\n \u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDrain Plug \u0026amp; O-Ring Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive:\u003c\/strong\u003e 806608, 806608A1, 806608A02, 806608Q01, 22-806608A1, 22-806608A02, 8M0103971, 8M0119211, 22-8M0119211\u003cbr\u003e\n \u003cstrong\u003eMercury Mariner:\u003c\/strong\u003e 22806608Q01\u003cbr\u003e\n \u003cstrong\u003eGLM:\u003c\/strong\u003e 13992\u003cbr\u003e\n \u003cstrong\u003eMallory:\u003c\/strong\u003e 9-41203\u003cbr\u003e\n \u003cstrong\u003eOBR Red Rhino:\u003c\/strong\u003e MR-511\u003cbr\u003e\n \u003cstrong\u003eSierra:\u003c\/strong\u003e 18-4226\n \u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust manifold gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Restricted-flow dry-joint elbow gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Full-flow dry-joint elbow gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Drain plugs supplied with O-rings\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust system to cool completely, shut off the water supply, and secure the ignition to prevent accidental starting before servicing the exhaust joints.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDrain the exhaust manifolds and risers\/elbows, and support heavy cast components during removal and reassembly to prevent fastener damage or personal injury.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean all cylinder head, manifold, and dry-joint elbow mating surfaces thoroughly, taking care not to gouge or distort the sealing flats.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDistinguish the restricted-flow (restrictor) dry-joint elbow gasket from the full-flow dry-joint elbow gasket by flow pattern and OEM reference number, and install the exact flow configuration specified by the engine manual for each joint.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eInspect the O-ring seats before installing the drain plugs with O-rings, and tighten all exhaust fasteners in the sequence and to the torque values specified in your service manual.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly and restoring cooling water supply, run the engine at idle and inspect all gasket joints and drain plugs for exhaust or water leaks; stop the engine immediately and inspect if leakage or overheating occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003cdiv style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow do the 7-degree and 14-degree references apply to this gasket kit?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThe 7-degree and 14-degree angles refer to the design of the dry-joint riser\/elbow used on the engine: the listed 2002–2004 MerCruiser GM V6 S.B. dry-joint configuration uses a 7-degree riser\/elbow, while the listed 2005–2010 configuration uses a 14-degree riser\/elbow under standard cooling.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhy does the kit include two different types of dry-joint elbow gaskets?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThis kit supplies both restricted-flow (restrictor) and full-flow dry-joint elbow gaskets, corresponding to the 864850-series and 864547-series reference groups. Compare the water passage openings and required reference number for your specific standard-cooling joint location during installation.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan I use this kit on a V8, wet-joint, or closed-cooling engine if one of the reference numbers matches?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. Individual elbow gaskets or drain plugs may share reference numbers across multiple engine families, but this repair kit is assembled specifically for MerCruiser GM V6 S.B. dry-joint applications with standard cooling.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171991314483,"sku":"24MFK128-1GK","price":57.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-7e9d75695dbf0ab8.png?v=1792755068"},{"product_id":"27-33395-dry-joint-exhaust-manifold-gasket-kit-for-mercruiser-v8","title":"27-33395 Dry-Joint Exhaust Manifold Gasket Kit for MerCruiser V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eDry-Joint Exhaust Manifold Gasket Repair Kit for MerCruiser GM V8 Small-Block — Standard Cooling\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust manifold gasket repair kit is for MerCruiser GM V8 small-block dry-joint engines from 2002–2004 (7° exhaust-joint generation) and 2005–2010 (14° exhaust-joint generation) equipped with standard cooling. It includes exhaust manifold gaskets, restricted-flow and full-flow dry-joint elbow gaskets, and drain plugs with O-rings corresponding to MerCruiser component references such as 27-33395, 27-864850A02, and 27-864547A1.\u003c\/p\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis is the standard-cooling kit version and is not the separately specified closed-cooling block-off gasket set.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint Type\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry Joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eStandard Cooling\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eIncluded Elbow Gasket Flow Types\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRestricted-flow dry-joint elbow gaskets (864850A02 \/ 27-864850A02 series) and full-flow dry-joint elbow gaskets (864547 series)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAssociated Exhaust-Joint Generations\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e7° dry-joint generation (2002–2004) and 14° dry-joint generation (2005–2010)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis kit applies to MerCruiser GM V8 small-block engines with dry-joint exhaust and standard cooling. Check the engine year, cooling configuration, and actual 7° or 14° exhaust-joint generation before ordering, particularly if the exhaust system has been changed.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V8 Small-Block (S.B.)\u003c\/strong\u003e — Years: 2002–2004. Exhaust connection: Dry Joint (7° exhaust-joint generation). Cooling system: Standard Cooling.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V8 Small-Block (S.B.)\u003c\/strong\u003e — Years: 2005–2010. Exhaust connection: Dry Joint (14° exhaust-joint generation). Cooling system: Standard Cooling.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong\u003eClosed-cooling block-off gasket configurations:\u003c\/strong\u003e This is the standard-cooling kit version and is not the separately specified closed-cooling gasket-set version. Restricted-flow, full-flow, and closed-cooling block-off gaskets are not interchangeable based only on a similar outline.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser GM V8 S.B. DRY JOINT, 2002–2004, Standard Cooling, 7° generation, V8 Small-Block.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 S.B. DRY JOINT, 2005–2010, Standard Cooling, 14° generation, V8 Small-Block.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are listed for part identification across the components included in this repair kit. They do not imply that individual gaskets of different flow configurations are interchangeable, nor do they indicate original-equipment manufacturer origin.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary Component OEM Group\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-33395, 864850A02, 864547A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eRestricted-Flow Dry-Joint Elbow Gasket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser Stern \/ Out Drive: 864850A02, 27-864850A02, 27-864850A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFull-Flow Dry-Joint Elbow Gasket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser Stern \/ Out Drive: 864547A1, 864547A02, 27-864547A02, 27-864547A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional MerCruiser \/ Mercury Mariner Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-33395, 806608A1, 806608, 806608A02, 806608Q01, 8M0119211, 8M0103971, 22806608Q01, 22-806608A1, 22-806608A02, 22-8M0119211, 25-26802\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM: 37900, 37910, 31100, 13992, 81110\u003cbr\u003eSierra: 18-0722, 18-0721, 18-4226\u003cbr\u003eBARR: CHV-47-000\u003cbr\u003eOBR Red Rhino: MR-511\u003cbr\u003eMallory: 9-41203\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust manifold gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Restricted-flow dry-joint elbow gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Full-flow dry-joint elbow gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Drain plugs with O-rings\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust components to cool completely, shut off the engine, and prevent accidental starting before servicing the exhaust system.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eIdentify the restricted-flow dry-joint elbow gaskets (864850A02 \/ 27-864850A02 series) and the full-flow dry-joint elbow gaskets (864547 series) by their water-passage layout and reference numbers. Do not treat restricted-flow, full-flow, and closed-cooling block-off gaskets as interchangeable based only on a similar outer profile.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifolds and elbows during disassembly and reassembly, and clean all sealing surfaces carefully without gouging the mating faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eInstall each gasket and the drain plugs with O-rings in the positions specified by the MerCruiser service manual for your standard-cooling dry-joint configuration.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly, inspect for exhaust or cooling-water leaks under normal cooling-water supply. Shut down the engine immediately and inspect the joints if any leakage or abnormal temperature is observed.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow are the restricted-flow and full-flow dry-joint elbow gaskets in this kit identified?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe kit includes two restricted-flow dry-joint elbow gaskets and two full-flow dry-joint elbow gaskets. Restricted-flow gaskets correspond to references 864850A02 \/ 27-864850A02 (and 27-864850A1), while full-flow gaskets correspond to the 864547 series (864547A1, 864547A02, 27-864547A02, 27-864547A1). Match each gasket by its coolant slot configuration rather than outer outline alone.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this gasket kit coverClosed-Cooling MerCruiser V8 dry-joint setups?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. This kit is configured for standard-cooling MerCruiser GM V8 small-block dry-joint engines (2002–2004 7° generation and 2005–2010 14° generation) and is not the closed-cooling block-off gasket set.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171991576627,"sku":"24MFK129-1GK","price":57.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-97e920887f0a21af.png?v=1792755080"},{"product_id":"27-815528-exhaust-manifold-gasket-for-mercruiser-120-140-3-0l-3-0lx","title":"27-815528 Exhaust Manifold Gasket for MerCruiser 120\/140 3.0L 3.0LX","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold Gasket for 4-Cylinder Marine Engines (Ref. 27-815528)\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust manifold gasket is for specified MerCruiser, Volvo Penta, and OMC 4-cylinder applications, including MerCruiser 120\/140 (1982–1995), 3.0L, 3.0LX (1990–1997), and 3.0L MPI models. It corresponds to the 27-815528 \/ 3853256 gasket pattern rather than the separate old-style MerCruiser 27-96429 pattern, and does not include exhaust elbow or carburetor gaskets.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eSelect this gasket by comparing your original manifold gasket reference, exact engine model suffix (such as LX, MPI, H.O., or GS), and production year rather than relying on “3.0L” or “4-cylinder” alone.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 120 \/ 140\u003c\/strong\u003e — Inline 4, 153 \/ 181 CID, 4-cylinder, 1982–1995. For older 120 and 140 engines, verify whether the manifold requires the 27-815528 gasket pattern or the separate old-style 27-96429 \/ GLM 33570 pattern.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 3.0LX \/ 3.0L\u003c\/strong\u003e — Inline 4, GM 181 CID, 4-cylinder, 1990 \u0026amp; up.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits as listed\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser MCM 3.0LX\u003c\/strong\u003e — 4-cylinder, 1990–1997.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits as listed\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.0L\u003c\/strong\u003e — 4-cylinder, after 1995 (including MCM 3.0L 1998 \u0026amp; newer).\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits as listed\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.0L MPI\u003c\/strong\u003e — 4-cylinder.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits as listed\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eChevy 4-Cyl.\u003c\/strong\u003e — Marine applications matching the 27-815528 \/ 3853256 exhaust manifold gasket reference.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eVolvo Penta \/ OMC Cobra Stern Drive\u003c\/strong\u003e — 4-cylinder marine engines using exhaust manifold gasket part numbers 3853256, 914518, 914578, or 0914578.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not imply OEM manufacturer identity or universal interchangeability across different manifold versions.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser \/ Mercury Mariner Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-815528, 815528\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eVolvo Penta Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3853256, 914578\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC \/ OMC Cobra Stern Drive Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3853256, 914518, 914578, 0914578\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eEvinrude \/ Johnson Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3853256\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eSierra 18-0680, GLM 33580, Mallory 9-61428, FEL-PRO 17304, UANOFCN 815528, 17304, MAR879\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDifferent Configuration (Not This Gasket)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser 27-96429, GLM 33570 (separate old-style MerCruiser manifold gasket pattern)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cp style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003eThis listing is for the standalone exhaust manifold gasket, not a complete manifold assembly or multi-component repair kit. Exhaust elbow and carburetor gaskets are separate items.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust system to cool completely and secure the ignition against accidental starting before beginning work.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust manifold while removing fasteners, then clean and inspect the cylinder head and manifold mating surfaces to protect the sealing area from burrs or old gasket material.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new gasket directly against the manifold ports, bolt holes, and your engine's required part reference (27-815528 vs. 27-96429) before installation.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eFollow your engine manufacturer's service manual for fastener tightening sequence and torque specifications; if any exhaust leak or abnormal temperature occurs during operation, stop the engine immediately and inspect.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does 27-815528 differ from MerCruiser 27-96429?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eMerCruiser 27-815528 (GLM 33580) and 27-96429 (GLM 33570) represent two different 4-cylinder manifold gasket patterns. Older MerCruiser 120 and 140 applications (1982–1995) may use either version depending on the manifold installed, while 3.0LX (1990–1997), 3.0L (after 1995 \/ 1998 \u0026amp; newer), and 3.0L MPI applications use the 27-815528 reference.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this product include exhaust elbow or carburetor gaskets?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. This item is the standalone exhaust manifold gasket (which is also used as a component in separate multi-piece repair kits). If your service work involves the exhaust elbow or carburetor joints, those gaskets must be sourced separately.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171991674931,"sku":"23GT304","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-e91aae877307f8b5.jpg?v=1792755096"},{"product_id":"27-99777-2-open-rear-riser-exhaust-elbow-gasket-for-mercruiser","title":"27-99777-2 Open Rear-Riser Exhaust Elbow Gasket for MerCruiser","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold-to-Elbow Gasket — Rear Riser, Open Type\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket open-type gasket seals the joint between the exhaust manifold and the exhaust elbow or adaptor on rear-riser MerCruiser Stern \/ Out Drive installations referenced under 27-99777-2, including specified 4\/6-cylinder (1968–1982, except 120 hp), V8 (1978–1982), Model 120\/140 inline-4, and 2.5L \/ 3.0L \/ 3.0LX series engines.\u003c\/p\u003e\n \u003cp style=\"margin:0;\"\u003eIt is the open rear-riser configuration and differs from the closed-cooling gasket version referenced as MerCruiser 27-92720 or GLM 32630.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Location\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold to exhaust elbow or adaptor\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eRiser Position\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRear riser\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGasket Flow Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eOpen type (distinct from the closed-cooling version referenced under MerCruiser 27-92720 \/ GLM 32630)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eSelect this gasket by matching both the engine application and the open rear-riser manifold-to-elbow or adaptor joint configuration rather than relying on engine displacement alone.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4\/6-Cyl. (except 120 hp)\u003c\/strong\u003e — Years: 1968–1982. Position and configuration: Rear riser, open-type gasket at the exhaust manifold to elbow or adaptor joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser All V8\u003c\/strong\u003e — Years: 1978–1982. Position and configuration: Rear riser, open-type gasket at the exhaust manifold to elbow or adaptor joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser MODEL 140 — INLINE 4, GM 181 CID, 4-CYL.\u003c\/strong\u003e — Years: 1968–1982. Position and configuration: Rear riser, open-type gasket at the exhaust manifold to elbow or adaptor joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser MODEL 120\/140 — INLINE 4, 153\/181 CID, 4-CYL.\u003c\/strong\u003e — Years: 1982–1995. Position and configuration: Rear riser, open-type gasket at the exhaust manifold to elbow or adaptor joint. For a 1982 Model 120, verify the actual manifold\/elbow version and required gasket number, as 1968–1982 120 hp applications are excluded.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 2.5L\u003c\/strong\u003e — Years: 1983–1994. Position and configuration: Rear riser, open-type gasket at the exhaust manifold to elbow or adaptor joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.0L\u003c\/strong\u003e — Years: 1983–1994. Position and configuration: Rear riser, open-type gasket at the exhaust manifold to elbow or adaptor joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser MODEL 3.0LX \/ 3.0L — INLINE 4, GM 181 CID, 4-CYL.\u003c\/strong\u003e — Years: 1990 \u0026amp; up. Position and configuration: Rear riser, open-type gasket at the exhaust manifold to elbow or adaptor joint. Verify the installed exhaust-joint version on 1990-onward engines, as the model name alone does not identify later design changes.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3 style=\"margin:24px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4-Cyl. 120 hp (1968–1982)\u003c\/strong\u003e — Excluded from the 1968–1982 4\/6-cylinder application range; for a 1982 Model 120 transition year, check the installed manifold\/elbow version and part number.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eClosed-Cooling Joint Applications Calling for MerCruiser 27-92720 or GLM 32630\u003c\/strong\u003e — Requires the closed-cooling gasket configuration rather than this open-type rear-riser gasket.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser 4-cylinder engines, 1968–1982; rear-riser open manifold-to-elbow\/adaptor gasket application, excluding 120 HP engines.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 6-cylinder engines, 1968–1982; rear-riser open manifold-to-elbow\/adaptor gasket application, excluding 120 HP engines.\u003c\/li\u003e\n\u003cli\u003eMerCruiser All V8 engines, 1978–1982; rear-riser open manifold-to-elbow\/adaptor gasket. Individual models and horsepower are not specified.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not indicate that this aftermarket part was manufactured by the referenced brands, and numbers for other joint configurations are separated below.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive Reference Numbers (Open Rear-Riser)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99777-2, 27-997772, 27-99777Q02, 99777Q02, 997771, 99777B2, 27-997771, 27-99777B2, 27-52076, 52076\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMercury Mariner Reference Number\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99777\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Reference Number\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508615\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Reference Numbers (Open Rear-Riser)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eSierra: 18-2833, 18-2833-9; GLM: GLM31520, 31520; RECMAR: REC27-99777Q02\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eDifferent Configuration Comparison — Closed-Cooling Version (Not Interchangeable)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser Stern \/ Out Drive: 27-92720; GLM: 32630\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional Catalog Comparison Numbers (Unconfirmed Relationship)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser Stern \/ Out Drive: 27-39915; GLM: 31410 (listed in catalog comparison records; not confirmed as direct replacements for the open rear-riser 27-99777-2 gasket)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e4 × Exhaust manifold-to-elbow gasket (rear riser, open type)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eShut off the engine, allow all exhaust components to cool completely, and disconnect the battery to prevent accidental cranking before loosening the elbow or adaptor hardware.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow or adaptor during removal and installation so its weight does not damage the manifold sealing surfaces or threads.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean old gasket material from both the manifold and the elbow or adaptor mating faces while protecting the machined surfaces from gouges, and verify that the passage layout matches the open rear-riser gasket.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAlign the new gasket with all bolt holes and passages, then tighten the fasteners to the sequence and specification listed in your engine service manual; stop operation immediately and inspect the joint if any exhaust or water leak is detected during initial run-up.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does 27-99777-2 differ from MerCruiser 27-92720 or GLM 32630?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eMerCruiser 27-99777-2 (and GLM 31520) identifies the open-type rear-riser gasket for the exhaust manifold-to-elbow or adaptor joint. If your joint specifies MerCruiser 27-92720 or GLM 32630, it requires the closed-cooling gasket version instead.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhy is the 1982 Model 120 listed in both the excluded and applicable ranges?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThe 1968–1982 4\/6-cylinder application group excludes 120 hp models, while the Model 120\/140 (153\/181 CID, inline-4) group spans 1982–1995. On a 1982 Model 120, match the installed manifold\/elbow version and original gasket reference number.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan I select this gasket for a 1990-onward 3.0L or 3.0LX by model name alone?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. For Model 3.0L and 3.0LX (GM 181 CID inline-4) engines from 1990 onward, the engine model name does not identify later exhaust-joint design changes; match the installed rear-riser manifold-to-elbow joint version and part reference 27-99777-2 \/ 27-99777Q02.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171991707699,"sku":"24GK061*4","price":21.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-94238d414053742a.png?v=1792755108"},{"product_id":"27-33395-exhaust-manifold-gasket-set-2-pcs-for-v8-marine-engines","title":"27-33395 Exhaust Manifold Gasket Set (2 Pcs) for V8 Marine Engines","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold Gasket Set (2 Pieces) for V8 Marine Engines\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis two-piece exhaust manifold gasket set is for exhaust manifold servicing on specified MerCruiser, Volvo Penta, and OMC Cobra V8 marine engine applications, including reference 27-33395. It is an exhaust manifold gasket set only, not an exhaust manifold assembly.\u003c\/p\u003e\n \u003cp style=\"margin:0;\"\u003eThis supplied set uses an updated gasket design with improved gas-tightness and sealing compared with the older version, so its appearance may differ from older online photos.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket set applies to specified V8 marine engines across the brands below. Confirm the required gasket part number and manifold configuration for your engine rather than selecting by engine brand, V8 layout, or older product photos alone.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern \/ Out Drive — V8 Engines\u003c\/strong\u003e: Exhaust manifold gasket application for matching V8 configurations requiring the listed MerCruiser gasket references.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — match required gasket reference and manifold configuration\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eOMC Cobra Stern \/ Out Drive — V8 Engines\u003c\/strong\u003e: Exhaust manifold gasket application for matching V8 configurations requiring the listed OMC Cobra gasket references.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — match required gasket reference and manifold configuration\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eVolvo Penta Stern \/ Out Drive — V8 Engines\u003c\/strong\u003e: Exhaust manifold gasket application for matching V8 configurations requiring the listed Volvo Penta gasket references.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — match required gasket reference and manifold configuration\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\n\u003cli\u003eMerCruiser V8 S.B., GM 305 CID, WET JOINT.\u003c\/li\u003e\n\u003cli\u003eMerCruiser V8 S.B., GM 350 CID, WET JOINT.\u003c\/li\u003e\n\u003cli\u003eMerCruiser V8 S.B., GM 377 CID, WET JOINT.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided as identification references for this gasket set. They do not indicate manufacturer identity and are not proof of fit for every V8 engine without matching your specific manifold and gasket requirement.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-33395, 27-33395A2, 8M2000819, 33395, 33395A1, 33395B, 879039\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Cobra Stern \/ Out Drive OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e96306, 096306, 0508556, 0508874, 0778149, 0908314, 0908485, 0909314, 0985630, 3852468\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eVolvo Penta OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3852468, 835256, 835966, 856034, 856116\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCrusader Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e96306\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Aftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-2902, 18-2949, 18-2949-9, 18-0872\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Aftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e31100, 31101\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eBARR Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eCHV-47-000\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust Manifold Gasket × 2 (two-piece gasket set)\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely cool and disconnected from accidental starting before loosening exhaust manifold fasteners.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust manifold while removing hardware so the weight of the casting does not damage studs, bolts, or mating surfaces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean old gasket material from the cylinder head and manifold mating surfaces carefully, keeping debris out of the exhaust ports and checking surfaces for flatness or corrosion.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new gaskets against the exhaust port layout and fastener holes on your engine and manifold, then install and tighten fasteners to the sequence and specification in your engine service manual.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly, inspect the manifold joint during initial operation and stop the engine immediately to check the installation if any exhaust leak or abnormal condition appears.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhy does this gasket look different from older photos online?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThis listing supplies the updated gasket design, which provides improved airtightness and sealing compared with the earlier version. Visual differences from older-version photos are expected; use the current product image and your required gasket part number to identify the part.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow many gaskets are included in this listing?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThis product is supplied as a two-piece exhaust manifold gasket set (Exhaust Manifold Gasket × 2). It does not include exhaust manifolds or mounting hardware.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172012351539,"sku":"23GT301*2","price":19.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-302d512fc9c3f501_84c70219-8178-4e56-a31d-265760b605f4.png?v=1792755292"},{"product_id":"27-18272-exhaust-elbow-gasket-for-mercruiser-3-7l-4-cylinder","title":"27-18272 Exhaust Elbow Gasket for MerCruiser 3.7L 4-Cylinder","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Elbow Gasket for MerCruiser 3.7L 4-Cylinder Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis exhaust elbow mounting gasket (referenced to OEM 27-18272) seals the exhaust elbow mounting joint on specified MerCruiser 4-cylinder stern drive applications, including 3.7L and 3.7LX MCM (224 CID) models. Fitment depends on whether the engine is equipped with an aluminum manifold (1985–1989 170\/470) or a cast iron manifold (excluding 1976–1982 470), and this listing is for the gasket item rather than the exhaust elbow assembly.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket fits specified MerCruiser 4-cylinder exhaust manifold and elbow assemblies. Because 3.7L engines used different manifold designs across production years, do not select the gasket by displacement alone; match the engine model, year, installed manifold version (aluminum or cast iron), and gasket reference against your actual assembly.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.7L 4-Cylinder 170 \/ 470\u003c\/strong\u003e — Years: 1985–1989. Configuration: With aluminum exhaust manifold.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 4-Cylinder Engines\u003c\/strong\u003e — Configuration: With cast iron exhaust manifold. Excludes 1976–1982 model 470.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 3.7L \u0026amp; 3.7LX MCM (224 CID) 4-Cylinder — Models 165, 170, 180, 190, 470, 485, 488\u003c\/strong\u003e — Years: 1980–1989. General manifold, elbow, end-cap, and gasket series grouping; verify installed manifold material (1985–1989 aluminum on 170\/470, or cast iron excluding 1976–1982 470) and exact elbow mounting gasket number.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"margin:18px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser 470 (4-Cylinder)\u003c\/strong\u003e — Years: 1976–1982. Excluded under cast iron manifold applications.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eNot suitable\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003ch3 style=\"font-size:17px;margin:20px 0 10px;color:#143b31;\"\u003eAdditional model-specific applications\u003c\/h3\u003e\n\u003cul style=\"padding-left:20px;line-height:1.7;\"\u003e\u003cli\u003eMerCruiser-built 4-cylinder engines, 1985, cast-iron exhaust manifold.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are public references for part identification and do not by themselves guarantee interchangeability across every manifold version or indicate original manufacturer identity. Keep Sierra references 18-0881 and 18-0881-1 distinct when cross-checking part numbers.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive \/ Mercury Mariner OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-18272, 27-97863, 18272, 97863\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508753\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e32470 (GLM32470)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Aftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0881, 18-0881-1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61412\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOSCO Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e8561-G\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust elbow gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eShut down the engine, disconnect the starting circuit to prevent accidental cranking, and allow the exhaust manifold and elbow to cool completely before servicing.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow while removing the mounting fasteners so its weight does not damage the mating surfaces or connected exhaust components.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean both the manifold and elbow mounting faces thoroughly, removing old gasket material and corrosion while protecting the sealing surfaces from gouges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new gasket profile and port openings directly against the manifold and elbow joint, then assemble and tighten fasteners according to the factory service manual for your specific manifold version.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter installation, inspect the joint during initial operation; if any exhaust or sealing abnormality is present, stop the engine immediately and recheck the assembly.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan I select this exhaust elbow gasket based only on having a MerCruiser 3.7L engine?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. Selection depends on the installed exhaust manifold material and production year. It fits 1985–1989 3.7L 4-cylinder 170\/470 engines with an aluminum manifold, and 4-cylinder engines with a cast iron manifold except the 1976–1982 470.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this item include the exhaust elbow or an entire manifold gasket kit?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. Although cataloged under manifold and gasket seal categories, this listing is for the exhaust elbow mounting gasket only, not the exhaust elbow assembly.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172012384307,"sku":"23GT302","price":12.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-e475750ba726ddd6.jpg?v=1792755317"},{"product_id":"27-99757-wet-joint-exhaust-manifold-gasket-kit-for-mercruiser-gm-v6","title":"27-99757 Wet-Joint Exhaust Manifold Gasket Kit for MerCruiser GM V6","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eMerCruiser Wet-Joint Exhaust Manifold Gasket Repair Kit — GM V6\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis exhaust manifold gasket and drain-plug seal repair set is designed for MerCruiser GM V6 229 and 262 CID (Models 175–205) wet-joint exhaust systems from 1983 through 0M serial numbers. It supports 3-inch and 4-inch wet-joint configurations and includes separate joint gaskets for raw-water cooling, fresh-water cooling, and full-flow elbow connections, referencing component OEM 27-99757.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet-joint exhaust system\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eApplicable Exhaust Size\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3-inch \u0026amp; 4-inch exhaust configurations\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eIncluded Joint Gasket Types\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold gaskets, raw-water-cooling joint gaskets, fresh-water-cooling joint gaskets, and full-flow elbow gaskets\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n\u003cul style=\"padding-left:20px;line-height:1.75;\"\u003e\u003cli\u003eMerCruiser MODEL 175–205, GM V6, 229\/262 CID; Wet Joint; 3-inch and 4-inch exhaust configurations; year \/ serial-phase designation: 1983 – 0M SN#’s.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThese numbers serve as identification references for the individual gasket and drain-plug components included in this repair set. They do not represent a single interchangeable part number for the complete kit and do not imply manufacturer identity. Keep complete prefixes and suffixes when comparing references.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary Component OEM References (MerCruiser)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-99757, 27-863724, 27-860231, 27-863726\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional MerCruiser Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e41813, 27-41813, 27-860233, 27-863724Q, 863724B, 863724Q, 863724, 8637251, 27-8637251, 863725, 27-863725, 860231, 41811, 27-41811, 87918, 87918A1, 27-818832, 27-860232, 27-871051, 87105, 860232\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMercury Mariner Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e806608A1, 806608, 806608A02, 806608Q01, 8M0119211, 8M0103971\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508716, 0502988, 0508715, 0508606\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0897, 18-0672-9, 18-0672, 18-2849-1, 18-4226\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e30240, 30220, 32080\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61413, 9-61422, 9-61414\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOBR Red Rhino Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMR-511\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Unassigned Component References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e871051, 818832, 863726\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust manifold gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Raw-water-cooling joint gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Fresh-water-cooling joint gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Full-flow elbow gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Drain plugs supplied with O-rings\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n This repair set contains multiple joint-gasket configurations. Only the gaskets matching your specific cooling system and joint position will be used during assembly.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust components to cool completely, shut off the battery switch, and secure the engine against accidental starting before servicing.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifolds and elbows during disassembly, and clean mating surfaces thoroughly without gouging or damaging the sealing planes.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eIdentify the required joint gasket (raw-water cooling, fresh-water cooling, or full-flow elbow) according to your engine's cooling-system layout and joint position before reassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eFit the new O-rings to the drain plugs and tighten fasteners in the sequence and specification required by the engine service manual.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter installation, inspect all exhaust joints and drain-plug seals under normal operating conditions; shut down immediately and inspect if any water or exhaust leak is detected.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhy does this kit include multiple joint-gasket styles?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eMerCruiser GM V6 wet-joint exhaust systems use different joint gaskets depending on the cooling configuration and joint position. This kit supplies two raw-water-cooling joint gaskets, two fresh-water-cooling joint gaskets, and two full-flow elbow gaskets alongside the two exhaust manifold gaskets so you can install the exact configuration specified for your system.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDo the listed OEM numbers represent the entire gasket repair kit?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. The listed OEM and aftermarket numbers—such as 27-99757, 27-863724, 27-860231, and 27-863726—identify individual gasket or drain-plug components contained within the set rather than a single complete-kit part number.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172495417395,"sku":"24MFK122GK","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-b74c8591bec3cb49.png?v=1792763573"},{"product_id":"27-33395-wet-joint-exhaust-manifold-gasket-kit-for-mercruiser-gm-v8","title":"27-33395 Wet-Joint Exhaust Manifold Gasket Kit for MerCruiser GM V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eWet-Joint Exhaust Manifold Gasket Repair Kit for MerCruiser GM Small-Block V8 Engines\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis wet-joint exhaust manifold gasket repair kit (including primary OEM reference 27-33395) is designed for servicing MerCruiser GM small-block V8 engines (Models 200-320, 305\/350\/377 CID, 1983 through 0M serial numbers) with 3-inch and 4-inch exhaust configurations. The kit supplies exhaust manifold gaskets, raw-water-cooling, closed-cooling, and full-flow joint gaskets, plus two drain plugs with O-rings so you can select the exact gasket version required by your cooling system and exhaust joint.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint Design\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet Joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3-inch and 4-inch exhaust configurations\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eIncluded Gasket Types\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold gaskets, raw-water-cooling gaskets, closed-cooling gaskets, and full-flow gaskets\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n The raw-water, closed-cooling, and full-flow gasket versions included in this kit are not interchangeable for every installation. A 3-inch or 4-inch exhaust configuration alone does not identify which gasket version to install at each joint; select the gasket required by your specific cooling-system configuration and exhaust joint.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n\u003cul style=\"padding-left:20px;line-height:1.75;\"\u003e\u003cli\u003eMerCruiser MODEL 200–320, GM Small-Block V8, 305\/350\/377 CID; Wet Joint; 3-inch and 4-inch exhaust configurations; year \/ serial-phase designation: 1983 – 0M SN#’s.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are public reference numbers associated with the gaskets and drain plug assemblies covered by this multi-gasket repair kit. They are provided for part identification and cross-checking only, and do not indicate that this aftermarket kit is manufactured by the engine brand or that different gasket flow versions within the list are interchangeable with one another.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePrimary OEM References (MerCruiser Stern \/ Out Drive)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-33395, 27-863724, 27-860231, 27-863726\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional MerCruiser Stern \/ Out Drive References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e41813, 27-41813, 27-860233, 27-863724Q, 863724B, 863724Q, 863724, 8637251, 27-8637251, 863725, 27-863725, 860231, 41811, 27-41811, 87918, 87918A1, 27-818832, 27-860232, 27-871051, 87105, 871051, 860232, 818832, 863726, 806608A1, 806608, 806608A02, 806608Q01, 8M0119211, 8M0103971\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508716, 0502988, 0508715, 0508606\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0897, 18-0672, 18-0672-9, 18-2849-1, 18-4226\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e30240, 30220, 32080\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61413, 9-61422, 9-61414\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOBR Red Rhino Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMR-511\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust manifold gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Raw-water-cooling gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Closed-cooling gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Full-flow gaskets\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003e2 × Drain plugs with O-rings\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust components to cool completely, shut off the water supply, and disconnect the battery to prevent accidental starting.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDrain the exhaust manifolds and cooling passages before unbolting the wet-joint exhaust components, and support heavy manifolds or elbows during disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean all mating surfaces thoroughly and inspect the casting sealing faces for corrosion, pitting, or distortion before installing new gaskets.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the removed gaskets and the engine service manual diagram to select the exact raw-water, closed-cooling, or full-flow gasket required for each wet joint; do not substitute a different flow configuration.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eInstall the drain plugs with their O-rings, tighten all fasteners according to the sequence and specifications in your MerCruiser service manual, and check for water or exhaust leaks at the joints and drain plugs during initial warm-up. Stop the engine immediately and inspect if any leakage or overheating occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhy does this kit include raw-water, closed-cooling, and full-flow gaskets together?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eMerCruiser GM small-block V8 (305\/350\/377 CID, Models 200-320, 1983 through 0M serial numbers) wet-joint exhaust systems use different joint gasket passage layouts depending on whether the engine is set up for raw-water cooling, closed cooling, or requires a full-flow joint. The kit includes all three joint gasket versions alongside the manifold-to-head gaskets and two drain plugs with O-rings, so you use only the joint gaskets that match your specific cooling and exhaust layout.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes knowing I have a 3-inch or 4-inch exhaust elbow tell me which joint gasket in the kit to use?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. While this kit covers both 3-inch and 4-inch wet-joint exhaust configurations on qualifying GM small-block V8 engines, riser diameter alone does not determine the water passage layout at the joint. The raw-water-cooling, closed-cooling, and full-flow gaskets are not interchangeable—match the slot configuration to your cooling system design and original gasket part number.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172495843379,"sku":"24MFK124GK","price":49.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-942ff32364e77067.png?v=1792763584"},{"product_id":"27-53354-exhaust-manifold-gasket-for-mercruiser-140","title":"27-53354 Exhaust Manifold Gasket for MerCruiser 140","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003e27-53354 Exhaust Manifold Gasket for MerCruiser 140\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eAftermarket exhaust manifold gasket referenced to 27-53354 for MerCruiser Model 140, GM 181 CID inline-four applications from 1968 to 1982. It seals the manifold-to-cylinder-head joint.\u003c\/p\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eInstallation Joint\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold gasket position (manifold-to-cylinder head under MerCruiser 27-53354; not for exhaust elbow or manifold end-cap joints)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Port Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eLarge-port version corresponding to 908079 \/ GLM 31570 (distinct from the small-port 3853256 \/ GLM 33580 version)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eEngine Block Architecture\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGM 181 CID \/ 3.0L inline 4-cylinder (140 HP)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n\u003cul style=\"padding-left:20px;line-height:1.75;\"\u003e\u003cli\u003eMerCruiser Model 140 \/ Inline GM 181 CID, four-cylinder, 140 HP; 1968–1982; Wet Joint manifold-to-cylinder-head gasket.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided as identification references for part selection and do not independently establish direct interchangeability across every engine variation or indicate manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-53354, 53354, 802377\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC \/ OMC Cobra Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508561, 508561, 0778121, 0908079, 908079\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAftermarket Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM 31570, Mallory 9-61417, Sierra 18-2912, Sierra 18-2912-1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Configuration Comparison (Not This Part)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eOMC 3853256, GLM 33580 (separately listed small-port version)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis listing is for the exhaust manifold gasket only, not a complete exhaust manifold assembly or a complete manifold repair kit.\u003c\/p\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is shut off and completely cool, and disconnect the battery to prevent accidental starting before loosening any exhaust components.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifold castings securely during removal and installation, and protect the machined sealing surfaces on both the cylinder head and manifold from gouges or debris.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the replacement gasket directly against the original part, port openings, and mounting bolt pattern at the exhaust manifold joint. Do not use this gasket at an exhaust elbow or manifold end-cap joint.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eFollow your engine manufacturer's service manual for surface preparation, fastener tightening sequence, and torque specifications. If any exhaust leak or abnormal operating condition occurs after reassembly, stop the engine and inspect the joint.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does this OMC 908079 \/ GLM 31570 gasket differ from 3853256 \/ GLM 33580?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eFor OMC 140 HP GM 181 CID \/ 3.0L (1973–1990) applications, this gasket corresponds to the large-port reference 0908079 \/ 908079 (GLM 31570). It is distinct from the separately listed small-port gasket under reference 3853256 (GLM 33580).\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan this gasket be used for the exhaust elbow or manifold end cap on the same engine?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. This part is solely for the exhaust manifold gasket position—identified under MerCruiser 27-53354 as the manifold-to-cylinder head gasket. Exhaust elbows and manifold end caps require their own dedicated gasket profiles.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172496662579,"sku":"24GK059","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-b850ff156f7561aa.png?v=1792763621"},{"product_id":"27-46820-exhaust-manifold-gasket-for-mercruiser-gm-big-block","title":"27-46820 Exhaust Manifold Gasket for MerCruiser GM Big Block","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003cdiv style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold Gasket — Adapter Plate to GM Manifold\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust manifold gasket (OEM reference 27-46820) seals the exhaust manifold joint on specified MerCruiser, Volvo Penta, and OMC Cobra GM-based big-block V8 marine engines (7.4L \/ 454 CID, 8.1L \/ 496 CID, and 8.2L \/ 502 CID). It is also used at the adapter-plate-to-GM-exhaust-manifold interface in matching two-piece Ford 460-to-GM 454 manifold conversion assemblies.\u003c\/p\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis item is a single exhaust manifold gasket component, not a complete exhaust manifold assembly or a complete manifold gasket repair kit.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003e27-46820 Exhaust Manifold Gasket for MerCruiser GM Big Block\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eAftermarket exhaust manifold gasket referenced to MerCruiser 27-46820 for the specified GM 7.4L, 8.1L and 8.2L big-block applications. Wet-joint and dry-joint conditions remain separated below.\u003c\/p\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n\u003cul style=\"padding-left:20px;line-height:1.75;\"\u003e\n\u003cli\u003eMerCruiser MODEL 330–370, GM V8 Big Block, 454\/502 CID; Wet Joint; 1981 onward.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 7.4L \/ 454 CID, 8.1L \/ 496 CID and 8.2L \/ 502 CID applications; match the individual exhaust assembly.\u003c\/li\u003e\n\u003cli\u003eMerCruiser GM V8 Big Block, Dry Joint; match the specific manifold gasket interface. The 6-inch configuration designation is not a gasket measurement.\u003c\/li\u003e\n\u003cli\u003eChevrolet \/ Chevy 454 and 502 engine-base applications with the specified marine exhaust manifold.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided as identification references across corresponding engine and aftermarket brands. They do not independently guarantee interchangeability across different manifold designs or indicate manufacturer identity; compare the complete part number (including any prefix, leading zero, and A1 suffix) along with the physical gasket shape.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-46820, 27-46820A1, 46820, 46820A1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eVolvo Penta Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3852472\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC Cobra Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508878, 0778127, 0909613, 508878, 778127, 909613, 3852472\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCrusader Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e96653\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0418\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e33760, 37760\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61400\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003cstrong\u003eReference Note:\u003c\/strong\u003e Do not select solely by GLM 37760; verify the exhaust manifold reference and gasket shape. Sierra 18-0418 is associated with use-with manifold references 18-1957-2, 18-1982, 18-1929, 18-1933, and 18-1898—those numbers identify exhaust manifolds, not engine models or replacement numbers for this gasket.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust system to cool completely, shut off the battery switch, and prevent accidental engine cranking before starting disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifold components during removal and installation to avoid damaging mounting studs, bolts, or mating surfaces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean and inspect the mating faces on the exhaust manifold and cylinder head (or adapter plate). Remove old gasket material without gouging the sealing surfaces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new gasket directly against the removed gasket and the sealing interface to verify port alignment and bolt hole positions. On a matching two-piece Ford 460-to-GM 454 conversion arrangement, install this gasket specifically between the adapter plate and the GM exhaust manifold.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eTighten fasteners following the sequence and torque specifications in the engine manufacturer's service manual. After starting the engine, inspect the joint for exhaust leaks; shut down immediately and inspect if any abnormal leakage or temperature occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003cdiv style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan I order this gasket for any Ford 460 marine engine?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. For Ford 460 applications, this gasket is only for the adapter-plate-to-GM-exhaust-manifold joint in a specific two-piece Ford 460-to-GM 454 manifold conversion assembly. It does not fit a standard Ford 460 cylinder-head-to-manifold joint.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eIs this an exhaust elbow \/ riser gasket or a complete gasket kit?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNeither. Exhaust manifold gaskets and exhaust elbow\/riser gaskets are separate parts serving different joints. This listing is for the individual exhaust manifold (or adapter-plate-to-GM-manifold) gasket, not a complete manifold gasket repair kit.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhat are Sierra numbers 18-1957-2, 18-1982, 18-1929, 18-1933, and 18-1898?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eThose are Sierra exhaust manifold part numbers associated as \"use-with\" assemblies for Sierra gasket 18-0418. They identify the mating exhaust manifolds rather than engine model numbers or direct gasket replacement numbers.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eRelated Service Parts\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eSierra reference 18-0418 lists the following associated exhaust manifold assemblies for use with this gasket style (manifolds are separate components and are not included with this gasket):\u003c\/p\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSierra Exhaust Manifold References: 18-1957-2, 18-1982, 18-1929, 18-1933, 18-1898\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172497252403,"sku":"24GK058","price":14.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-ac6ac11ab8c0ef7a.jpg?v=1792763653"},{"product_id":"27-863724-exhaust-gaskets-for-mercruiser-2-pack","title":"27-863724 Exhaust Gaskets for MerCruiser - 2 Pack","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Elbow Gasket — Raw Water Cooling\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust elbow joint gasket (referenced to MerCruiser 27-863724) seals the exhaust manifold-to-elbow joint on listed MerCruiser Stern Drive V6 and V8 engines equipped with raw-water cooling. It serves specified Wet Joint exhaust systems from 1981 and 1983 onward, as well as designated GM V6 and V8 small-block Dry Joint \"Alternative\" configurations from 0M serial numbers and up.\u003c\/p\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis listing is for an individual exhaust gasket only, not an exhaust manifold or exhaust elbow assembly.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Location\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold-to-elbow joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRaw water cooling\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Design\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet Joint (1981 \u0026amp; UP \/ 1983 - 0M serial numbers by engine series); Dry Joint \"Alternative\" (0M serial numbers \u0026amp; UP on GM V6 \/ V8 small-block)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFlow \/ Restrictor Note\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eReferenced to restrictor gasket Sierra 18-0897\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eApplies to the MerCruiser Stern Drive raw-water-cooled applications listed below. Match the gasket reference, cooling arrangement, and joint design to the parts installed on your engine; raw-water, fresh-water, and manifold-and-spacer gasket types are listed separately.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern Drive — Model 175–205 (V6, GM 229 \/ 262 CID)\u003c\/strong\u003e\u003cbr\u003e\n Years \/ Serial Range: 1983 – 0M serial numbers. Cooling: Raw water cooling. Joint Configuration: Wet Joint exhaust manifold-to-elbow joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern Drive — Model 200–320 (V8 Small Block, GM 305 \/ 350 \/ 377 CID)\u003c\/strong\u003e\u003cbr\u003e\n Years \/ Serial Range: 1983 – 0M serial numbers. Cooling: Raw water cooling. Joint Configuration: Wet Joint exhaust manifold-to-elbow joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern Drive — Model 330–370 (V8 Big Block, GM 454 \/ 502 CID)\u003c\/strong\u003e\u003cbr\u003e\n Years: 1981 \u0026amp; UP. Cooling: Raw water cooling. Joint Configuration: Wet Joint exhaust manifold-to-elbow joint.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern Drive — GM V6 \/ V8 Small Block\u003c\/strong\u003e\u003cbr\u003e\n Serial Range: 0M serial numbers \u0026amp; UP. Cooling: Raw water cooling. Joint Configuration: Dry Joint \"Alternative\" exhaust manifold-to-elbow arrangement.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Stern Drive — 350 MAG, 454 MAG, 502 MAG \/ 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 8.2L\u003c\/strong\u003e\u003cbr\u003e\n Cooling: Raw water cooling. Position: Exhaust elbow joint. Applies where matched to the listed CID, serial number, and Wet Joint or Dry Joint \"Alternative\" requirements above.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n For a Dry Joint \"Alternative\" application, verify the exact alternative exhaust arrangement installed on the engine before ordering; do not select this gasket solely because the engine has a Dry Joint exhaust system.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are public identification references for part lookup and do not by themselves establish universal interchangeability or original manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-41813, 27-860233, 27-863724, 27-863724Q, 27-863724Q, 41813, 863724, 863724B, 863724Q\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508716\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0897 (restrictor gasket reference)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e30240\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61413\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eBARR\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMC 20 99208, MC47-27-41813, MC-47-27-41813\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOSCO\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e8503-GR\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n\u003cul style=\"padding-left:20px;line-height:1.75;\"\u003e\u003cli\u003e2 × Exhaust Elbow Gasket — identical gaskets with the same OEM reference: 27-41813; 27-860233; 27-863724.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is shut down, completely cool, and secured against accidental starting before servicing the exhaust manifold-to-elbow joint.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow during removal and installation, and clean both mating surfaces thoroughly without gouging or warping the sealing faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the water passage layout and joint profile of the new gasket against the removed gasket and your engine's raw-water cooling configuration before assembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eTighten fasteners to the sequence and torque values specified in your engine service manual, then inspect the joint for exhaust or water leaks during initial operation with proper cooling water supply; shut down immediately if any leak or abnormal temperature occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan I use this gasket on any MerCruiser Dry Joint exhaust system?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. Standard Wet Joint and Dry Joint exhaust systems use different joint interfaces. For 0M and up GM V6 and V8 small-block engines, this gasket applies only to the specified Dry Joint \"Alternative\" arrangement under raw-water cooling, not to all Dry Joint exhaust assemblies.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this gasket fit fresh-water (closed) cooling or spacer setups?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket is designated for sealing the exhaust manifold-to-elbow joint in the listed raw-water-cooled applications (cross-referenced to restrictor gasket Sierra 18-0897). Raw-water, fresh-water, and manifold-and-spacer gasket types are cataloged separately According to the cooling path required.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172499972147,"sku":"23GT303*2","price":13.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-c7682dcea9cda023.jpg?v=1792763696"},{"product_id":"27-863724-exhaust-elbow-riser-gasket-for-mercruiser-v6-v8-4-pack","title":"27-863724 Exhaust Elbow Riser Gasket for MerCruiser V6 V8 - 4 Pack","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003cdiv style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold Elbow Riser Gasket for MerCruiser Wet-Joint and Specified Dry-Joint Alternative Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust manifold-to-elbow\/riser joint gasket (referencing MerCruiser OEM 27-863724) seals the mounting interface between the exhaust manifold and riser elbow on specified MerCruiser V6 and V8 engines, including 350 MAG, 454 MAG, and 502 MAG models.\u003c\/p\u003e\n \u003cp style=\"margin:0;\"\u003eIt is configured for raw-water-cooled wet-joint systems across 1981 and up big-block and 1983 to 0M-serial small-block\/V6 applications, with a separately limited dry-joint alternative application for 0M and up GM V6 and small-block V8 engines.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Location\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold to elbow \/ riser joint\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCooling Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRaw water cooling\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint Design\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet joint (with a separately limited dry-joint “alternative” application on 0M \u0026amp; up GM V6 \/ V8 S.B. engines)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eSelect this gasket by matching your engine model, full serial number, exhaust-joint design, and cooling configuration rather than relying on engine displacement alone. A restricted center-riser gasket should not be selected solely because its outline resembles an open or closed-cooling gasket.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 175–205 (V6, GM 229 \/ 262 CID)\u003c\/strong\u003e — Years \/ Serial Range: 1983 – 0M SN#’s. Joint Configuration: Wet Joint. Cooling: Raw water cooling.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 200–320 (V8 Small Block, GM 305 \/ 350 \/ 377 CID)\u003c\/strong\u003e — Years \/ Serial Range: 1983 – 0M SN#’s. Joint Configuration: Wet Joint. Cooling: Raw water cooling.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 330–370 (V8 Big Block, GM 454 \/ 502 CID)\u003c\/strong\u003e — Years: 1981 \u0026amp; UP. Joint Configuration: Wet Joint. Cooling: Raw water cooling.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \/ V8 Small Block\u003c\/strong\u003e — Serial Range: 0M SN#’s \u0026amp; UP. Joint Configuration: Dry Joint “Alternative”.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Elbow-Joint Applications (350 MAG, 454 MAG, 502 MAG; 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, 8.2L)\u003c\/strong\u003e — Applicable only when the engine serial number, wet-joint or specified dry-joint alternative design, and raw-water cooling configuration match the requirements listed above.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference. They do not indicate original equipment manufacturer status or guarantee universal interchangeability across all MerCruiser V6 and V8 exhaust configurations.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive OEM References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e41813, 27-41813, 27-860233, 27-863724, 27-863724Q, 863724B, 863724Q, 863724\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC OEM Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508716\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Gasket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0897\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e30240\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61413\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eRECMAR Gasket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eREC27-863724Q\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Cross-Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMC47-27-41813, 8503-GR\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAssociated Exhaust Elbow \/ Assembly Reference Numbers (Not Gasket Numbers)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMC 20 99208; Sierra 18-1976-2, 18-1970-2; RECMAR MAR988, REC98504A3\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n Note: Associated exhaust elbow and assembly numbers (such as Sierra 18-1976-2, 18-1970-2, RECMAR MAR988, REC98504A3, and MC 20 99208) identify related exhaust hardware that may use this gasket profile. This listing is for the gasket product only, not an exhaust manifold or elbow casting.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n\u003cul style=\"padding-left:20px;line-height:1.75;\"\u003e\u003cli\u003e4 × Exhaust Manifold Elbow Riser Gasket — identical gaskets with the same OEM reference: 27-863724Q.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is shut off, completely cool, and secured against accidental starting before servicing the exhaust system.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDrain the exhaust manifold and riser water passages in accordance with your engine service manual before loosening the elbow hardware.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the weight of the exhaust elbow or riser during removal and installation, and clean both mating surfaces thoroughly without gouging the sealing flanges.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eVerify that the gasket water passages and orientation match the manifold-to-elbow joint design and cooling flow path specified for your engine serial number.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eTighten fasteners to the sequence and torque values specified in the factory service manual. After reassembly, run the engine with proper cooling water supply and inspect the joint for water or exhaust leaks; stop the engine immediately if any abnormal leakage or temperature rise occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003cdiv style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this gasket fit all MerCruiser 4.3L, 5.0L, 5.7L, 6.2L, 7.4L, and 8.2L engines?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. Engine displacement or model designation (such as 350 MAG, 454 MAG, or 502 MAG) alone does not determine gasket fitment. This gasket applies to raw-water-cooled wet-joint systems on V6 (229\/262 CID) and small-block V8 (305\/350\/377 CID) engines from 1983 through 0M serial numbers, big-block V8 (454\/502 CID) wet-joint systems from 1981 and up, and the specified dry-joint alternative application on 0M and up GM V6 and small-block V8 engines.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eCan this gasket be used interchangeably with open or closed-cooling riser gaskets of a similar shape?\u003c\/h3\u003e\n \u003cp style=\"margin:0;\"\u003eNo. A restricted center-riser gasket or raw-water gasket should not be substituted solely because its outer footprint resembles an open full-flow or closed-cooling block-off gasket. Always match the cooling configuration and joint type to your engine's exact serial number and exhaust system design.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172501053491,"sku":"23GT303*4","price":16.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-2291d58177cd42db.png?v=1792763708"},{"product_id":"27-863726-exhaust-gaskets-for-mercruiser-4-pack","title":"27-863726 Exhaust Gaskets for MerCruiser - 4 Pack","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Elbow and Spacer Gasket for MerCruiser GM V6 \u0026amp; V8 Center-Riser Open Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust elbow and spacer gasket corresponds to MerCruiser reference 27-863726 and seals the exhaust manifold, elbow, and spacer interfaces on specified MerCruiser GM V6 and V8 configurations. It aligns with the center-riser open passage layout (such as 27-860232 \/ GLM 32080) for designated wet-joint models (1981 and up or 1983 through 0M serial numbers, depending on engine family) and specified GM V6\/V8 small-block Dry Joint \"Alternative\" manifold\/spacer interfaces (0M serial numbers and up).\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eInterface Location\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust manifold, elbow, and spacer sealing interfaces (manifold\/spacer interface on specified Dry Joint \"Alternative\" setups)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePassage Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eCenter-riser open gasket layout (corresponds to 27-860232 \/ GLM 32080; distinct from restricted 27-860233 \/ GLM 30240 and closed 27-860231 \/ GLM 30220 versions)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eExhaust Joint Design\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eSpecified Wet Joint systems and GM V6\/V8 Small Block Dry Joint \"Alternative\" configurations\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003cstrong\u003eConfiguration Boundary:\u003c\/strong\u003e The \"Dry Joint Alternative\" application applies to the manifold\/spacer interface on converted or alternative setups and does not indicate universal compatibility with every factory dry-joint exhaust connection.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis gasket fits the MerCruiser GM V6 and V8 exhaust applications listed below. Match the engine family, cubic-inch displacement, exhaust-joint design, required passage layout, and serial-number range to your assembly before ordering.\u003c\/p\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 175-205 (V6, GM 229 \/ 262 CID)\u003c\/strong\u003e — Year \/ serial phase: 1983 – 0M SN#’s. Exhaust configuration: Wet Joint. Interface: Exhaust manifold, elbow, and spacer.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 200-320 (V8 Small Block, GM 305 \/ 350 \/ 377 CID)\u003c\/strong\u003e — Year \/ serial phase: 1983 – 0M SN#’s. Exhaust configuration: Wet Joint. Interface: Exhaust manifold, elbow, and spacer.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser Model 330-370 (V8 Big Block, GM 454 \/ 502 CID)\u003c\/strong\u003e — Years: 1981 and up. Exhaust configuration: Wet Joint. Interface: Exhaust manifold, elbow, and spacer.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMerCruiser GM V6 \/ V8 Small Block\u003c\/strong\u003e — Serial numbers: 0M and up. Exhaust configuration: Dry Joint \"Alternative\" system at the manifold\/spacer interface.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n\n \u003ch3 style=\"margin:24px 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eApplication Check Required\u003c\/h3\u003e\n \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eMercury Mariner 200 (DFI \/ EFI), 200 PRO XS, 225 (EFI \/ DFI), 225 SEAPRO, 250 (DFI \/ EFI) 3.0L\u003c\/strong\u003e — Listed in supplementary notes without specific exhaust interface or serial-number details. Verify by OEM part number 27-863726 and physical gasket passage layout against your engine parts diagram.\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eConfirm application\u003c\/span\u003e\n \u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not alone guarantee interchangeability across different cooling flows or indicate OEM manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-863726\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMercury Mariner\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-818832, 27-860232 (center-riser open gasket), 27-871051, 27-87105\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOMC\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0508606\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e32080 (center-riser open gasket)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-2849-1, 18-2849-9-1\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMallory\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-61414\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eRECMAR\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eREC27-863726\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eAdditional Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e87105, 860232, 871051, 818832, 863726, 27-863726\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Flow Configurations (For Comparison Only — Not Direct Substitutes)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRestricted version: MerCruiser 27-860233 \/ GLM 30240\u003cbr\u003eClosed (block-off) version: MerCruiser 27-860231 \/ GLM 30220\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n\u003cul style=\"padding-left:20px;line-height:1.75;\"\u003e\u003cli\u003e4 × Exhaust Elbow and Spacer Gasket — identical gaskets with the same OEM reference: 27-863726.\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAllow the engine and exhaust assembly to cool completely, shut off the battery switch, and take precautions to prevent accidental starting before loosening any exhaust hardware.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust elbows and spacers during disassembly so weight does not damage threads or cast sealing surfaces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean old gasket material and corrosion from the mating surfaces of the manifold, spacer, and elbow without gouging or rounding the machined sealing faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new open center-riser gasket side-by-side with the required cooling passage layout for that specific joint; do not substitute an open gasket where your cooling diagram specifies a restricted (27-860233) or closed block-off (27-860231) gasket.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eTighten fasteners evenly in the sequence and to the torque specification listed in the engine manufacturer's service manual. After assembly, inspect the joint for exhaust or water leaks during initial operation and stop the engine immediately if any abnormality occurs.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does 27-863726 \/ 27-860232 differ from 27-860233 and 27-860231?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eReference 27-860232 (GLM 32080) is the center-riser open passage gasket. MerCruiser 27-860233 (GLM 30240) is the restricted flow version, and 27-860231 (GLM 30220) is the closed block-off version. Each serves a specific water-routing role in the exhaust assembly and cannot be used interchangeably.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDoes this gasket fit all MerCruiser Dry Joint exhaust manifolds?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. For 0M and up GM V6 and V8 small-block engines, this gasket applies only to the manifold\/spacer interface in a Dry Joint \"Alternative\" system, as well as the listed wet-joint configurations (Model 175-205 V6 229\/262 CID 1983–0M, Model 200-320 V8 S.B. 305\/350\/377 CID 1983–0M, and Model 330-370 V8 B.B. 454\/502 CID 1981 \u0026amp; up). It does not fit every factory dry-joint connection.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172503543859,"sku":"23GT296*4","price":13.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-1616ea9474c87965.jpg?v=1792763744"},{"product_id":"27-864547a02-dry-joint-open-exhaust-elbow-gasket-for-mercruiser-v8","title":"27-864547A02 Dry-Joint Open Exhaust Elbow Gasket for MerCruiser V8","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eDry-Joint Open Exhaust Elbow Gasket for MerCruiser V8 Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket dry-joint open (full-flow) exhaust elbow gasket is used at the exhaust elbow interface on listed MerCruiser 5.0L, 350 MAG, and MX 6.2L V8 applications referencing OEM number 27-864547A02. It is an open-flow gasket version and is not a restrictor or block-off gasket, nor a complete manifold or elbow assembly.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eConfiguration \u0026amp; Specifications\u003c\/h2\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003ePart Type\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eExhaust elbow gasket (gasket, not a complete manifold or elbow assembly)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eJoint Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eDry-Joint exhaust elbow interface\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eFlow Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eOpen (Full-Flow) version; distinct from restrictor and block-off versions\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n\u003cul style=\"padding-left:20px;line-height:1.75;\"\u003e\n\u003cli\u003eMerCruiser 5.0L and 5.0 MPI, GM 305 CID V8; Dry Joint Open Elbow Gasket configuration.\u003c\/li\u003e\n\u003cli\u003eMerCruiser 350 MAG MPI and MX 6.2L MPI Black Scorpion; Dry Joint Open Elbow Gasket configuration.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are provided for part identification and cross-reference only; they do not alone guarantee interchangeability across different gasket flow configurations or indicate manufacturer identity.\u003c\/p\u003e\n \u003ctable style=\"width:100%;table-layout:fixed;border-collapse:collapse;text-align:left;\"\u003e\n \u003ctbody\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eMerCruiser Stern \/ Out Drive Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e27-684547A02, 27-864547A02, 27-864547A1, 864547A02, 27-864850A02, 864850A02, 864850A1, 27-864549A02, 27-864549A1, 27-864550A02\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eGLM Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e37900, 37910, 37920\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSierra Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-0720, 18-0721, 18-0722\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eRECMAR Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eREC270, REC27-864547A02, REC27-864850A02\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Reference Number\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eRM27-864549A02\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003c\/tbody\u003e\n \u003c\/table\u003e\n \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n \u003cstrong\u003eGasket Version Note:\u003c\/strong\u003e Full-flow (open), restrictor, and block-off dry-joint gaskets are distinct versions that often appear together in reference tables (such as across the 27-864547A02, 27-864549A02, 27-864550A02, and 27-864850A02 series, or GLM 37900\/37910\/37920 and Sierra 18-0720\/18-0721\/18-0722). A similar part number alone is not enough to select the correct gasket—verify that your joint requires the open gasket version.\n \u003c\/div\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eDry-joint open exhaust elbow gasket\u003c\/li\u003e\n \u003c\/ul\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is shut off, completely cool, and secured against accidental starting before beginning work on the exhaust elbow joint.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport the exhaust elbow during removal and installation, and clean both dry-joint mating surfaces carefully without gouging or damaging the sealing faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the water passage cutouts on the replacement open gasket against the required configuration in your service manual; never substitute an open (full-flow) gasket where a restrictor or block-off gasket is specified.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly, inspect the joint during initial operation and shut down immediately to inspect if any exhaust or water leakage is observed.\u003c\/li\u003e\n \u003c\/ol\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eExhaust parts need a configuration match. Serdamarine focuses on marine exhaust manifolds and their related service parts. Application details, connection requirements and public reference numbers are presented together to support part selection.\u003c\/p\u003e\n \u003c\/section\u003e\n\n \u003csection style=\"margin:0 0 40px;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eQuestions Before Replacement\u003c\/h2\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eHow does this open gasket differ from restrictor or block-off dry-joint gaskets?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eDry-joint MerCruiser exhaust systems use different gasket flow versions—open (full-flow), restrictor, and block-off—depending on the specific exhaust and cooling arrangement. This product is the open gasket version for the dry-joint exhaust elbow interface and cannot be used in place of a restrictor or block-off gasket.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eIs this a complete manifold gasket kit or a gasket?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis listing is for the dry-joint open exhaust elbow gasket only. It is not a multi-gasket kit and does not include exhaust manifolds, elbows, risers, or end caps.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172505739315,"sku":"23GK306","price":26.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-7c1ce811ed125960.jpg?v=1792763796"},{"product_id":"27-96429-manifold-gasket-for-mercruiser-2-5l-3-0l-non-lx","title":"27-96429 Manifold Gasket for MerCruiser 2.5L 3.0L Non-LX","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n\u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n\u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003e27-96429 Manifold Gasket for MerCruiser 2.5L 3.0L Non-LX\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eAftermarket exhaust manifold mounting gasket referenced to MerCruiser 27-96429 for the listed 120\/2.5L and 140\/3.0L old-style non-LX applications. The LX gasket configuration is different; model years and serial limits are listed below.\u003c\/p\u003e\u003c\/section\u003e\u003csection style=\"margin:0 0 40px;\"\u003e\u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eEngine Applications\u003c\/h2\u003e\n\u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n\u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003eMerCruiser 120 \/ 2.5L, GM 153 CID inline-four; 1983–1989; serial 6229718–0C853255; old-style non-LX manifold.\u003c\/li\u003e\n\u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003eMerCruiser 140 \/ 3.0L, GM 181 CID inline-four; 1982–1995; serial 6229718–0F603999; old-style non-LX manifold.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eNot Suitable For\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:22px;\"\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eNot suitable for MerCruiser 3.0LX, 1990–1995, serial 0C856559–0F426999; this configuration uses 27-815528 \/ GLM 33580.\u003c\/li\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eNot suitable for the MerCruiser 3.0L \/ LX configuration from serial 0F427000 onward (1995 onward); use the specified 27-815528 \/ GLM 33580 gasket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eMatch the original part reference and the configuration of the installed assembly.\u003c\/p\u003e\u003c\/section\u003e\u003csection style=\"margin:0 0 40px;\"\u003e\u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n\u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eProduct references\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:22px;\"\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eMercruiser Stern \/ Out Drive — 27-96429\u003c\/li\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eMercruiser Stern \/ Out Drive — 96429\u003c\/li\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eSierra — 18-1204\u003c\/li\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eSierra — 18-1204-1\u003c\/li\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eSierra — 18-1204-1-9\u003c\/li\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eGLM — 33570\u003c\/li\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eMallory — 9-61419\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eOther-brand reference\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:22px;\"\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eOMC — 0912164\u003c\/li\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eOMC — 912164\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eDifferent gasket configuration — not this product\u003c\/h3\u003e\n\u003cul style=\"margin:0;padding-left:22px;\"\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eMercruiser Stern \/ Out Drive — 27-815528\u003c\/li\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eGLM — 33580\u003c\/li\u003e\n\u003cli style=\"margin:0 0 12px;\"\u003eother — 3853256\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003csection style=\"margin:0 0 40px;\"\u003e\u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n\u003cul style=\"margin:0;padding-left:22px;\"\u003e\u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold mounting gasket (27-96429)\u003c\/li\u003e\u003c\/ul\u003e\u003c\/section\u003e\u003csection style=\"margin:0 0 40px;\"\u003e\u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n\u003col style=\"list-style-type:decimal;margin:0;padding-left:22px;\"\u003e\n\u003cli\u003eAllow the engine to cool and prevent accidental starting before service.\u003c\/li\u003e\n\u003cli\u003eInspect the mating surfaces and connections, then install using the engine manufacturer’s procedure and specified settings.\u003c\/li\u003e\n\u003cli\u003eCheck the serviced connection for leakage before returning the engine to use.\u003c\/li\u003e\n\u003c\/ol\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45172697628723,"sku":"24GK054","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-6eeca0c29581abe5.jpg?v=1792766386"}],"url":"https:\/\/serdamarine.com\/collections\/mercruiser-manifold-elbow-gaskets.oembed","provider":"我的商店","version":"1.0","type":"link"}