{"title":"OMC 3.0 \/ 3.0 H.O. · GM 181 CID · 4-Cylinder Sterndrive — 1993 \u0026 Up · Exhaust System","description":"\u003cdiv class=\"model-catalog\"\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/omc-3-0-3-0-h-o-gm-181-cid-4-cylinder-sterndrive\"\u003eBack to OMC 3.0 \/ 3.0 H.O. · GM 181 CID · 4-Cylinder Sterndrive\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\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/3853256-exhaust-manifold-gasket-kit-for-omc-cobra-3-0gs\"\u003e3853256 Exhaust Manifold Gasket Kit for OMC Cobra 3.0GS\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eYear: 1993 \u0026amp; Up\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"catalog-reference\"\u003eCatalog parts list · Ref. 2, 3, 4\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e","products":[{"product_id":"3853256-exhaust-manifold-gasket-kit-for-omc-cobra-3-0gs","title":"3853256 Exhaust Manifold Gasket Kit for OMC Cobra 3.0GS","description":"\u003cdiv style=\"width:100%;max-width:960px;margin:0 auto;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.75;color:#293a35;background:#ffffff;overflow-wrap:anywhere;\"\u003e\n  \u003csection style=\"padding:28px 24px;margin:0 0 40px;border-top:5px solid #234d40;background:#f5f3ec;box-sizing:border-box;\"\u003e\n    \u003cp style=\"margin:0 0 14px;color:#456052;font-size:12px;line-height:1.6;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;\"\u003eSERDAMARINE \/ MARINE EXHAUST PARTS\u003c\/p\u003e\n    \u003ch2 style=\"margin:0 0 18px;color:#203e32;font-family:Georgia,Times,serif;font-size:clamp(25px,4vw,34px);font-weight:400;line-height:1.25;\"\u003eExhaust Manifold Gasket Repair Kit for OMC Cobra 3.0GS\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eThis exhaust manifold gasket repair kit is designed for exhaust manifold service on OMC Cobra 3.0GS (181 CID, 4-cylinder) applications from 1993 onward. It brings together the manifold gasket (reference 3853256), exhaust elbow gaskets, carburetor mounting gasket, and drain plugs with O-rings for matching service positions.\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 kit applies to the 3.0GS four-cylinder sterndrive configuration listed below. Confirm the exact engine designation, installed manifold, elbow, carburetor mounting gasket references, and the drain plug and O-ring version before ordering.\u003c\/p\u003e\n    \u003cul style=\"list-style:none;margin:0;padding:0;\"\u003e\n      \n      \u003cli style=\"margin:0;padding:17px 0;border-bottom:1px solid #dce3dc;\"\u003e\n        \u003cstrong\u003eOMC Cobra 3.0GS\u003c\/strong\u003e — 181 CID, 4-cylinder. Years: 1993 and later (ending year not specified). For exhaust manifold, elbow, carburetor mounting gasket, and drain plug service.\n        \u003cspan style=\"display:block;margin:6px 0 0;color:#59421f;font-size:13px;font-weight:700;\"\u003eFits as listed\u003c\/span\u003e\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eReference Numbers\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eThe numbers below are public identification references for individual kit components and related service entries. They are listed for part identification and do not by themselves guarantee complete-kit interchangeability or indicate original manufacturer identity.\u003c\/p\u003e\n    \u003cdiv style=\"margin:18px 0 0;padding:14px 16px;border-left:3px solid #8c622b;background:#faf5e9;color:#59421f;\"\u003e\n      Component references 3853256 (exhaust manifold gasket), 3850495 (exhaust elbow gasket), and 3853283 (carburetor mounting gasket) identify individual gaskets within this repair set and are not interchangeable part numbers for the complete kit.\n    \u003c\/div\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 Manifold Gasket Component Reference\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eVolvo Penta: 3853256; OMC: 3853256; Evinrude \/ Johnson Outboard: 3853256\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;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 Elbow Gasket Component Reference\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eVolvo Penta: 3850495; OMC: 3850495\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eCarburetor Mounting Gasket Component Reference\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eVolvo Penta: 3853283; OMC: 3853283\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;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 Associated References\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eVolvo Penta: 914578; OMC: 0914578, 914578, 908013; OMC Cobra Stern \/ Out Drive: 914518; Evinrude \/ Johnson Outboard: 908013, 33770\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;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 \/ MerCruiser Associated References\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eMerCruiser Stern \/ Out Drive: 27-815528, 815528, 802376; Mercury Mariner: 27-815528, 22806608Q01\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;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 Brand References\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003eSierra: 18-0680, 18-2875, 18-2875-1, 18-2875-1-9, 18-4226; GLM: 33580, 33770, 30382, 13992; Mallory: 9-61428, 9-42800, 9-41203; OBR Red Rhino: MR-511\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth scope=\"row\" style=\"width:36%;padding:13px 10px 13px 0;border-bottom:1px solid #e0e5df;vertical-align:top;text-align:left;font-size:14px;font-weight:700;color:#456052;\"\u003eOther Public Cross-References\u003c\/th\u003e\n          \u003ctd style=\"padding:13px 0 13px 10px;border-bottom:1px solid #e0e5df;vertical-align:top;\"\u003e17304, MAR879, 0778045, 778045, 0908013, 909013, 0914598, 914598, 806608, 806608A1, 806608A02, 806608Q01, 8M0119211, 8M0103971\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eSupplied Parts\u003c\/h2\u003e\n    \u003cul style=\"margin:0;padding-left:22px;\"\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eExhaust manifold gasket (reference 3853256)\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003e2 × Exhaust elbow gaskets (reference 3850495)\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eCarburetor mounting gasket (reference 3853283)\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003e2 × Drain plugs with O-rings\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eService \u0026amp; Installation Notes\u003c\/h2\u003e\n    \u003cp style=\"margin:0 0 14px;\"\u003eGeneral service guidance only. Use the service manual for your exact engine and exhaust configuration.\u003c\/p\u003e\n    \u003col style=\"margin:0;padding-left:22px;list-style-type:decimal;\"\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eEnsure the engine is completely cool, shut off the power supply to prevent accidental starting, and drain the exhaust manifold before disassembly.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eSupport heavy exhaust manifold and elbow castings securely during removal, and clean all mating flange and mounting surfaces thoroughly without gouging the metal.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eCompare the new manifold gasket (3853256), elbow gaskets (3850495), carburetor mounting gasket (3853283), and drain plugs with O-rings against the removed parts to verify port alignment and thread match.\u003c\/li\u003e\n      \u003cli style=\"margin:0 0 12px;\"\u003eFollow your engine service manual for fastener tightening sequence, torque specifications, and initial run-in inspection; stop the engine immediately and inspect if any exhaust or water leak is observed.\u003c\/li\u003e\n    \u003c\/ol\u003e\n  \u003c\/section\u003e\n\n  \u003csection style=\"margin:0 0 40px;padding:24px;border-top:1px solid #bdc9c0;border-bottom:1px solid #bdc9c0;background:#f5f3ec;box-sizing:border-box;\"\u003e\n    \u003ch2 style=\"margin:0 0 18px;padding:0 0 10px;border-bottom:1px solid #bdc9c0;color:#234d40;font-family:Georgia,Times,serif;font-size:25px;font-weight:400;line-height:1.35;\"\u003eThe Serdamarine Approach\u003c\/h2\u003e\n    \u003cp style=\"margin:0;\"\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 3853256, 3850495, and 3853283 part numbers for the complete gasket kit?\u003c\/h3\u003e\n      \u003cp style=\"margin:0;\"\u003eNo. Those three numbers identify individual gaskets inside the kit: 3853256 is the exhaust manifold gasket, 3850495 is the exhaust elbow gasket, and 3853283 is the carburetor mounting gasket. They are not standalone part numbers for the entire repair set.\u003c\/p\u003e\n    \u003c\/div\u003e\n    \u003cdiv style=\"margin:0;padding:18px 0;border-bottom:1px solid #dce3dc;\"\u003e\n      \u003ch3 style=\"margin:0 0 10px;color:#234d40;font-size:17px;line-height:1.5;font-weight:700;\"\u003eWhich 3.0L engines does this repair kit fit?\u003c\/h3\u003e\n      \u003cp style=\"margin:0;\"\u003eThis set is listed for OMC Cobra 3.0GS (181 CID, 4-cylinder) applications from 1993 onward, where the installed manifold, elbow, carburetor mounting gasket, and drain plug versions match the components in this kit.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/section\u003e\n\u003c\/div\u003e","brand":"Serdamarine","offers":[{"title":"Default Title","offer_id":45171574210611,"sku":"24MFK140GK","price":36.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0699\/2930\/4115\/files\/marine-exhaust-part-5980751c9cccca23.png?v=1792750181"}],"url":"https:\/\/serdamarine.com\/collections\/omc-3-0-3-0-h-o-gm-181-cid-4-cylinder-sterndrive-1993-up-exhaust-system.oembed","provider":"我的商店","version":"1.0","type":"link"}