{"title":"MerCruiser 3.7LX 4 BBL. Mercruiser 224 CID Sterndrive","description":"\u003cdiv class=\"model-catalog\"\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/mercruiser-3-7l-224-cid-inline-4-mercruiser-sterndrive\"\u003eBack to MerCruiser 3.7L 224 CID Inline 4 Mercruiser Sterndrive\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eSelect a model, production range or part section to narrow your search.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/mercruiser-3-7lx-4-bbl-mercruiser-224-cid-sterndrive-0b775249-up\"\u003eMerCruiser 3.7LX 4 BBL. Mercruiser 224 CID Sterndrive — 0B775249 \u0026amp; UP\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/mercruiser-3-7lx-4-bbl-mercruiser-224-cid-sterndrive-19801989-0b775249-up-wet-joint-exhaust-elbow\"\u003eMerCruiser 3.7LX 4 BBL. Mercruiser 224 CID Sterndrive — 1980–1989 · 0B775249 \u0026amp; UP · Wet Joint · EXHAUST ELBOW\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMatch the model and any listed year, serial number and configuration before choosing a part.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"70981a3-3-inch-upper-exhaust-bellows-for-mercruiser-sterndrives","title":"70981A3 3-Inch Upper Exhaust Bellows for MerCruiser Sterndrives","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;\"\u003eUpper Exhaust Bellows (3-Inch Upper Version for MerCruiser Exhaust Arrangements)\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis upper 3-inch exhaust bellows, referenced to Mercury 70981A3, serves MerCruiser sterndrive exhaust connections using a 3-inch center-mounted riser to a 4-inch elbow or a rear-mounted riser to a 4-inch Y-pipe. Applications cover specified MerCruiser models including 470\/485, 898, 228, 250, 260, 280, 330, Ford 233, V8 (1971–1982), and V6 \u0026amp; V8 installations when matched to these riser, elbow, and Y-pipe arrangements.\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 Position \u0026amp; Version\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eUpper 3-inch exhaust bellows (distinct from the upper 4-inch version and lower 3-inch exhaust tube)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eSupported Exhaust Arrangements\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3\" (3-inch) center-mounted riser to 4\" (4-inch) elbow; or rear-mounted riser to 4\" (4-inch) Y-pipe\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 upper exhaust bellows by matching the actual riser, elbow, and Y-pipe arrangement rather than relying on engine family alone. On old-style Model 120\/140 applications, check whether the exhaust elbow is a one-piece or two-piece design before selecting the connection part.\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 Models 470\/485, 898, 228, 250, 260, 280, 330 and Ford 233\u003c\/strong\u003e — Upper exhaust bellows application for matching exhaust connections (3-inch center-mounted riser to 4-inch elbow, or rear-mounted riser to 4-inch Y-pipe).\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 V8 (1971–1982), V6 \u0026amp; V8\u003c\/strong\u003e — Applicable when equipped with a 3\" center-mounted riser to a 4\" elbow, or a rear-mounted riser to a 4\" Y-pipe.\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\u003eOld-Style Model 120\/140 Application\u003c\/strong\u003e — Check whether the exhaust elbow is one-piece or two-piece and verify the connection position and part reference.\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\u003cli\u003eMerCruiser 175-205, V6; GM 229\/262 CID; wet-joint exhaust; upper 3-inch bellows for GLM 51110 exhaust elbow, OEM 98504A3.\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 only and do not by themselves establish universal interchangeability or manufacturer identity. Compare the reference number and connection position carefully, as alternate exhaust connection sizes and positions are listed below for comparison.\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;\"\u003eOEM Reference (Upper 3-Inch Version)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMercury \/ Mercury Mariner: 70981A3, 70981A 3, 70981\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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 (Upper 3-Inch Version)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eGLM: 89070; Sierra \/ Sierra Marine: 18-2762; OBR \/ OBR Red Rhino: MR-508; Mallory \/ Mallory Marine: 9-72808; RECMAR: REC70981A3\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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 This Part)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e\n Upper 4-inch version: Mercury \/ Mercury Mariner \/ MerCruiser Stern \/ Out Drive 32-44348001, GLM 89120\u003cbr\u003e\n Lower 3-inch exhaust tube: Mercury \/ Mercury Mariner \/ MerCruiser Stern \/ Out Drive 32-90949T, GLM 89090\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;\"\u003eAdditional Listed Reference Numbers\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e\n Mercury Mariner \/ MerCruiser Stern \/ Out Drive: 32-4434001\u003cbr\u003e\n GLM: 01080, 01100\u003cbr\u003e\n Unassigned brand references: 70981B3, 872531, 54-815504372\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;\"\u003eUpper Exhaust Bellows\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 disconnect the battery or disable the ignition to prevent accidental starting during work.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eVerify the existing exhaust layout—specifically checking whether your setup uses a 3-inch center-mounted riser to a 4-inch elbow or a rear-mounted riser to a 4-inch Y-pipe, and confirming that the upper 3-inch bellows is at the service position.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eInspect the mating necks on the riser, elbow, or Y-pipe before fitting the replacement bellows, keeping the clamping and sealing surfaces clean and undamaged.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSeat and secure the bellows according to the OEM service manual for your exact sterndrive exhaust arrangement; if any abnormal exhaust odor or leakage occurs during subsequent operation, 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;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 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 upper bellows differ from Mercury 32-44348001 and 32-90949T?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis part (referenced to Mercury 70981A3 \/ GLM 89070) is the upper 3-inch exhaust bellows for a 3-inch center-mounted riser to a 4-inch elbow or a rear-mounted riser to a 4-inch Y-pipe. Mercury 32-44348001 (GLM 89120) identifies a separate upper 4-inch version, while Mercury 32-90949T (GLM 89090) identifies a separate lower 3-inch exhaust tube.\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 needs to be checked on an old-style MerCruiser Model 120\/140?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eOn the old-style Model 120\/140 application, inspect whether the exhaust elbow is a one-piece or two-piece design and match the exact connection position to the part reference.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165055967283,"sku":"17B1014","price":24.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-17b4c90583f64caf.png?v=1792733411"},{"product_id":"8m0067654-exhaust-water-shutter-for-mercruiser-140-3-0l-v8-tdi-4-2l","title":"8M0067654 Exhaust Water Shutter for MerCruiser 140 3.0L V8 TDI 4.2L","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 Water Shutter for MerCruiser Stern \/ Out Drive Applications\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket exhaust water shutter (flapper valve) is an individual service component corresponding to Mercury Marine reference 8M0067654, rather than a complete exhaust manifold assembly. It is intended for exhaust water shutter replacement on MerCruiser 140, 3.0L, 3.0LX, V8, and TDI 4.2L (335, 370 MCM \/ MIE) applications.\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;\"\u003eUse the exact engine model and exhaust shutter part reference to distinguish similar versions; do not select a shutter solely because it is described for a MerCruiser V8 engine.\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 — 140 \/ 3.0L \/ 3.0LX\u003c\/strong\u003e\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — Match the engine configuration and exhaust shutter reference.\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 — V8\u003c\/strong\u003e\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — Match the exact engine model and exhaust shutter part reference; do not select solely by V8 engine description.\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 — TDI 4.2L (335, 370 MCM \/ MIE)\u003c\/strong\u003e\n \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits when specified — Match the engine configuration and exhaust shutter reference.\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 alone confirm 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;\"\u003eMercury Marine \/ Mercury Mariner\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e8M0067654, 60930\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-2727\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-42800\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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;\"\u003e89165\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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;\"\u003eREC60930\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e25-43809\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 water shutter\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 opening any exhaust components.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eRemove the necessary exhaust passage connections to access the existing water shutter and inspect the internal mounting area for leftover debris or wear.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003ePosition the replacement exhaust water shutter in the orientation specified by your engine service manual and verify that the flapper moves freely without binding.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eReassemble the exhaust connections according to manual procedures; if abnormal exhaust noise or leakage occurs during operation, stop the engine 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;\"\u003eCan this shutter be selected for any MerCruiser V8 engine without checking part numbers?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. Similar exhaust versions exist across MerCruiser V8 engines, so selection must be based on the exact engine model and matching exhaust shutter reference numbers such as 8M0067654 or 60930.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165058261043,"sku":"17ST001","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-5f944d1f21261376.jpg?v=1792733632"},{"product_id":"70981a3-wet-joint-exhaust-bellows-repair-kit-for-mercruiser-3-7l-3-id","title":"70981A3 Wet-Joint Exhaust Bellows Repair Kit for MerCruiser 3.7L 3\" ID","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 Manifold Exhaust Bellows Repair Kit for MerCruiser 3.7L \/ 224 CID Inline-4 (1980–1989)\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis aftermarket manifold exhaust bellows repair kit is designed for servicing the exhaust bellows and elbow-to-manifold gasket connections on specified 1980–1989 MerCruiser 224 CID inline 4-cylinder sterndrive engines with a wet-joint exhaust configuration. It groups component references 70981A3, 32-90949T, and 27-18272, where the lower exhaust tube reference is associated with a 3-inch inside-diameter version rather than a 4-inch tube.\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 Configuration\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eWet-joint manifold and elbow arrangement\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eService Connection Area\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eManifold exhaust hose\/bellows and elbow-to-manifold gasket connections\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eLower Exhaust Tube Inside Diameter\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e3-inch inside-diameter version (associated with the lower exhaust tube reference; not for 4-inch tube 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;\"\u003eEngine Architecture\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eInline 4-cylinder, 224 CID sterndrive\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 fits the MerCruiser inline 4-cylinder 224 CID sterndrive models listed below when equipped with a wet-joint exhaust arrangement. Check the engine model, model year, wet-joint manifold configuration, gasket pattern, and the 3-inch inside-diameter lower exhaust tube requirement against your existing parts before ordering, and do not select a 4-inch tube solely because it looks 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 Stern \/ Out Drive Model 165\u003c\/strong\u003e — Inline 4, 224 CID, 4-cylinder; Years: 1980–1989; Configuration: Wet-joint exhaust, sterndrive.\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 170\u003c\/strong\u003e — Inline 4, 224 CID, 4-cylinder; Years: 1980–1989; Configuration: Wet-joint exhaust, sterndrive.\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 3.7L\u003c\/strong\u003e — Inline 4, 224 CID, 4-cylinder; Years: 1980–1989; Configuration: Wet-joint exhaust, sterndrive.\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 180\u003c\/strong\u003e — Inline 4, 224 CID, 4-cylinder; Years: 1980–1989; Configuration: Wet-joint exhaust, sterndrive.\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 190\u003c\/strong\u003e — Inline 4, 224 CID, 4-cylinder; Years: 1980–1989; Configuration: Wet-joint exhaust, sterndrive.\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 3.7LX\u003c\/strong\u003e — Inline 4, 224 CID, 4-cylinder; Years: 1980–1989; Configuration: Wet-joint exhaust, sterndrive.\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 470 MCM\u003c\/strong\u003e — Inline 4, 224 CID, 4-cylinder; Years: 1980–1989; Configuration: Wet-joint exhaust, sterndrive.\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 485\u003c\/strong\u003e — Inline 4, 224 CID, 4-cylinder; Years: 1980–1989; Configuration: Wet-joint exhaust, sterndrive.\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 488\u003c\/strong\u003e — Inline 4, 224 CID, 4-cylinder; Years: 1980–1989; Configuration: Wet-joint exhaust, sterndrive.\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 the individual components associated with this kit and do not by themselves establish manufacturer identity or universal interchangeability. The primary OEM references 70981A3, 32-90949T, and 27-18272 identify distinct component parts rather than three interchangeable numbers for one complete OEM 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\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e70981A3, 32-90949T, 27-18272 (Mercury Mariner \/ MerCruiser Stern \/ Out Drive)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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;\"\u003e70981A3, 70981A 3, 70981, 32-90949T, 3290949T, 90949T, 32-90949, 27-18272\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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;\"\u003e70981A3, 32-90949T, 27-18272, 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 Component 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;\"\u003eSierra Aftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e18-2762, 18-2761, 18-0881, 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;\"\u003eGLM Aftermarket References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e89070, 89090, GLM32470, 32470\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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 References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e9-72808, 9-72809, 9-61412\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;\"\u003eOBR Red Rhino Aftermarket Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMR-508\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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 References\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eREC70981A3, REC32-90949T, REC27-18272\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;\"\u003eWet-joint manifold exhaust bellows repair kit (associated with component references 70981A3, 32-90949T, and 27-18272)\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 battery power to prevent accidental starting, and allow the exhaust manifold, elbow, and cooling passages to cool completely before disassembly.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust components during removal and clean all mating surfaces on the wet-joint manifold, elbow, and exhaust tube connections without gouging the sealing faces.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the replacement bellows, lower exhaust tube (3-inch inside-diameter version), and elbow-to-manifold gasket pattern directly against the removed components to verify proper orientation and passage alignment.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAssemble the gasket and exhaust bellows connections according to the procedures and fastener specifications in the engine service manual.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly, inspect the exhaust and cooling connections under normal operating conditions; if any exhaust or water leakage or abnormal temperature occurs, stop the engine immediately and inspect the joints.\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;\"\u003eAre 70981A3, 32-90949T, and 27-18272 interchangeable part numbers for the complete kit?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. Those three OEM numbers identify individual components combined within this repair kit—covering the exhaust bellows\/tube and elbow-to-manifold gasket positions—rather than three interchangeable numbers for a single factory 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;\"\u003eCan this kit be used on an application with a 4-inch lower exhaust tube?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. The lower exhaust tube reference in this kit is associated with a 3-inch inside-diameter version for 1980–1989 MerCruiser 224 CID inline 4-cylinder wet-joint applications, and should not be installed in place of a 4-inch tube even if the exterior shape looks similar.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45165061472307,"sku":"24MFK121","price":51.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-14fbdc5350add46d.jpg?v=1792734026"},{"product_id":"32-33220-thermostat-housing-to-exhaust-hose-for-mercruiser-volvo","title":"32-33220 Thermostat Housing to Exhaust Hose for MerCruiser \u0026 Volvo","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 \u003cdiv 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\/div\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;\"\u003eThermostat Housing to Exhaust Manifolds and Elbows Hose\u003c\/h2\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eThis cooling-system hose connects the thermostat housing to the exhaust manifolds and elbows on matching MerCruiser, Volvo Penta, and OMC Cobra stern drive installations, referenced to primary number 32-33220. It is supplied as the replacement hose only—not a thermostat housing assembly—and is distinct from the larger 1¼-inch inside-diameter hose version referenced under Sierra 18-75125.\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;\"\u003eConnection Route\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eThermostat housing to exhaust manifolds and elbows\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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 18-75100 Reference Specification\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eStraight 48-inch hose with a 1-inch inside diameter (Sierra reference specification; does not independently confirm the measured dimensions of the supplied hose)\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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 Contrast\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eSierra 18-75125 is a different straight 48-inch hose version with a 1¼-inch inside diameter; do not select between these versions by length alone\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;\"\u003eIntended for cooling-system installations routing water from the thermostat housing to the exhaust manifolds and elbows across matching stern drive platforms. Do not select this hose by MerCruiser, Volvo Penta, or OMC Cobra brand name alone; verify the original part number, exact engine model, cooling-system hose arrangement, and required inside diameter before ordering.\u003c\/p\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 \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\u003c\/strong\u003e — Thermostat housing to exhaust manifolds and elbows cooling hose installation. Match the exact engine model, cooling-system hose routing, and original part number.\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 \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eVolvo Penta Stern \/ Out Drive\u003c\/strong\u003e — Thermostat housing to exhaust manifolds and elbows cooling hose installation. Match the exact engine model, cooling-system hose routing, and original part number.\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 \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n \u003cstrong\u003eOMC Cobra Stern \/ Out Drive\u003c\/strong\u003e — Thermostat housing to exhaust manifolds and elbows cooling hose installation. Match the exact engine model, cooling-system hose routing, and original part number.\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;\"\u003eThese numbers are provided for part identification only and do not independently confirm interchangeability across all installations 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 Stern \/ Out Drive Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e32-33220, 8M0062614, 32-3322070\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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 \/ MerCruiser Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e32-8M0062614\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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;\"\u003e910305, 912424, 913488\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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 \/ OMC Cobra Primary Reference\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e0509272, 0910305, 0911945, 0912424, 0913488, 5000354\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eSierra 18-75100; Mallory \/ Mallory Marine 9-44062; RECMAR REC32-33220\u003c\/td\u003e\n \u003c\/tr\u003e\n \u003ctr\u003e\n \u003cth scope=\"row\" style=\"width:36%;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 Specification Contrast (Not This Item)\u003c\/th\u003e\n \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eSierra 18-75125 (1¼-inch inside diameter, 48-inch straight hose version; listed for identification distinction only and not a replacement for 18-75100)\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;\"\u003eThermostat housing to exhaust manifolds and elbows hose\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 cooling and exhaust components to cool completely, and disconnect the battery or disable starting before loosening any cooling-system hose connections.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eCompare the replacement hose against the existing hose between the thermostat housing and the exhaust manifolds or elbows, checking both inside diameter and routing path.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eClean the hose barb or nipple seating surfaces on the thermostat housing, manifold, or elbow fittings, and inspect for corrosion, pitting, or distortion before fitting the new hose.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eRoute the hose without kinks, sharp bends, or contact against hot or moving engine components, and secure the connections according to the engine manufacturer's service manual.\u003c\/li\u003e\n \u003cli style=\"margin:0 0 12px;\"\u003eAfter reassembly, run the engine only with a proper cooling-water supply and inspect the thermostat housing, manifold, and elbow hose connections for 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;\"\u003e\n \u003ch2 style=\"margin:0 0 18px;padding:0 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 Sierra reference 18-75100 differ from 18-75125?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eBoth Sierra numbers are listed as straight 48-inch hoses, but they have different inside diameters: 18-75100 is listed with a 1-inch inside diameter, while 18-75125 is a 1¼-inch inside-diameter version. Do not choose between them by hose length alone, and note that Sierra reference specifications do not independently confirm the measured dimensions of the supplied hose.\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 thermostat housing or fittings?\u003c\/h3\u003e\n \u003cp style=\"margin:0 0 14px;\"\u003eNo. This product is the replacement hose connecting the thermostat housing to the exhaust manifolds and elbows, not a thermostat housing assembly.\u003c\/p\u003e\n \u003c\/div\u003e\n \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171570933811,"sku":"2739","price":30.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-cdb2efc12b38b2aa.png?v=1792749936"},{"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":"27-18272-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"}],"url":"https:\/\/serdamarine.com\/collections\/mercruiser-3-7lx-4-bbl-mercruiser-224-cid-sterndrive.oembed","provider":"我的商店","version":"1.0","type":"link"}