{"title":"MerCruiser 330–370 · GM 454 \/ 502 CID · V8 B.B. Sterndrive — 1983 \u0026 Up · Wet Joint · Raw Water Cooling · Exhaust System","description":"\u003cdiv class=\"model-catalog\"\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/mercruiser-330370-gm-454-502-cid-v8-b-b-sterndrive-1983-up\"\u003eBack to MerCruiser 330–370 · GM 454 \/ 502 CID · V8 B.B. Sterndrive — 1983 \u0026amp; Up\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eMatch the application and restrictions below with your engine or drive before ordering.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eProduct\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eCatalog reference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/27-863724q-restrictor-exhaust-elbow-riser-gasket-for-mercruiser-v6-v8\"\u003e27-863724Q Restrictor Exhaust Elbow Riser Gasket for MerCruiser V6 V8\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eYear: 1983 \u0026amp; Up; Cooling: Raw Water Cooling; Joint: Wet Joint; Required configuration: Wet-joint exhaust; use the gasket specified for the installed cooling system.\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"catalog-reference\"\u003eCatalog parts list · Ref. 5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/27-863724-exhaust-gaskets-for-mercruiser-2-pack\"\u003e27-863724 Exhaust Gaskets for MerCruiser - 2 Pack\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eYear: 1983 \u0026amp; Up; Cooling: Raw Water Cooling; Joint: Wet Joint; Required configuration: Wet-joint exhaust; use the gasket specified for the installed cooling system.\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"catalog-reference\"\u003eCatalog parts list · Ref. 5\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","products":[{"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":"27-863724-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"}],"url":"https:\/\/serdamarine.com\/collections\/mercruiser-330370-gm-454-502-cid-v8-b-b-sterndrive-1983-up-wet-joint-raw-water-cooling-exhaust-system.oembed","provider":"我的商店","version":"1.0","type":"link"}