{"title":"MerCruiser 4-Stroke 115-140HP Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"max-width:1100px;margin:0 auto;padding:16px 12px;\"\u003e\n  \u003cp\u003eThis page is for MerCruiser 4-Stroke 115–140HP outboard engines. Use it to find compatible parts and practical service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse the main MerCruiser collection. Scroll to the bottom of this page to start browsing parts for this engine, and remember you can use the “Filter \u0026amp; Sort” controls on the collection page to narrow results by horsepower, year range, and part category\/section.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\" style=\"display:inline-block;margin-top:8px;padding:10px 14px;background:#0a4a7a;color:#fff;text-decoration:none;border-radius:6px;\"\u003eBrowse All MerCruiser Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"max-width:1100px;margin:0 auto;padding:8px 12px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 115–140HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the nameplate\/serial plate on the transom bracket or swivel bracket; the serial number is the primary key for parts matching.\u003c\/li\u003e\n    \u003cli\u003eModel codes often include suffixes for shaft length (L\/XL), steering\/control type (tiller vs. remote), and charging options; note these details before ordering.\u003c\/li\u003e\n    \u003cli\u003eFor 4‑stroke engines, confirm features like an external spin‑on oil filter and EFI components; this helps distinguish platforms and parts families.\u003c\/li\u003e\n    \u003cli\u003eIf unsure between similar 115–140HP platforms, compare serial ranges and major components (cowling style, intake\/air‑fuel module, and power trim configuration) to narrow compatibility.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"max-width:1100px;margin:0 auto;padding:8px 12px;\"\u003e\n  \u003ch2\u003eEngine Overview\u003c\/h2\u003e\n  \u003ch3\u003eInline‑4 EFI 4‑Stroke (115–140HP class)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInline‑4, EFI 4‑stroke outboard; typical systems include integrated air\/fuel delivery, ECM‑controlled ignition, and power trim\/tilt.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003e115HP EFI 4‑Stroke and related 4‑cylinder 4‑stroke variants in the 115–140HP range (exact model codes vary by year and region).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eGood fuel economy and mid‑range torque, quiet operation, and broad parts availability for service items.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eSome components change across serial ranges and years (e.g., starter variants, electrical plate layouts). Always verify by serial number before ordering.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"max-width:1100px;margin:0 auto;padding:8px 12px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for 4‑stroke outboards. Always follow the official service manual for your exact model and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eFirst 20 hrs, then every 100 hrs or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eWarm engine before draining; replace crush washer if applicable; verify oil spec\/grade.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-oil-filters\"\u003eMerCruiser Oil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 100 hrs or annually; also after water intrusion\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInspect magnetic plug for metal; replace drain\/fill gaskets; pressure test if contamination is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/lower-unit-seal-kits\"\u003eLower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInspect every 100 hrs; replace as needed or per manual\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eCheck gap and heat range; replace if fouled or worn.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark plug\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eFuel filter \/ water-separating filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 100 hrs or annually; sooner with ethanol fuel\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eDrain\/inspect for water; replace cartridges per spec to protect injectors.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-fuel-filters\"\u003eMerCruiser Fuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 2–3 seasons or 300 hrs (inspect annually)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eEssential for cooling; replace housing\/wear plate as needed for weak stream or scoring.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-water-pump-repair-kits\"\u003eMercury Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eAnodes (sacrificial)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInspect every 50–100 hrs; replace when 50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eChoose alloy for water type (zinc, aluminum, or magnesium); ensure good bonding\/clean contact.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"font-size:12px;color:#666;\"\u003e*Intervals may vary by duty cycle and environment (saltwater, trolling use, storage). Follow your official service literature.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"max-width:1100px;margin:0 auto;padding:8px 12px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-service-maintenance-kits\"\u003eMerCruiser Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System – \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pump-impeller-rebuild-kits\"\u003eWater Pump Impeller Rebuild Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-fuel-filters\"\u003eMerCruiser Fuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical – \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion – \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eSeals \u0026amp; Gaskets – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-gaskets\"\u003eMerCruiser Gaskets\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"max-width:1100px;margin:0 auto;padding:8px 12px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eWeak telltale stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInspect intake screens for blockage, confirm thermostat operation, and assess water pump impeller condition.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eWater pump kit, thermostat, gaskets\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003ePoor acceleration or loss of power\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eCheck propeller for damage\/cavitation, replace clogged fuel filters, verify spark plug condition and fuel quality.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003ePropeller, fuel filter, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eConfirm battery health and connections, inspect plugs, and check for air leaks or contaminated fuel.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs, fuel filter, starter\/battery components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eVerify correct oil level and condition; inspect for fishing line on prop shaft; pressure test for leaking seals.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eLower unit seal kit, bearings, propeller hardware\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"max-width:1100px;margin:0 auto;padding:8px 12px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable across different years or platforms in the 115–140HP range?\u003c\/summary\u003e\n    \u003cp\u003eMany service items are similar, but critical components can change with serial ranges and platform updates. Always confirm your serial number and any model suffixes before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eInspect annually and replace every 2–3 seasons (or about 300 hours). Replace sooner if you notice a weak telltale, overheating, or sand\/debris use.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the gear oil?\u003c\/summary\u003e\n    \u003cp\u003eTypically every 100 hours or annually, and any time water contamination is suspected. Inspect magnetic plugs and reseal the lower unit if leaks are detected.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the engine serial number, model code and suffix, shaft length, and any key features (tiller\/remote, charging options). Photos of the nameplate and the part needing replacement also help.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"max-width:1100px;margin:0 auto;padding:16px 12px;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year, and model? Browse our main MerCruiser collection to zero in on compatible components for your 115–140HP 4‑stroke.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\" style=\"display:inline-block;margin:8px 0;padding:10px 14px;background:#0a4a7a;color:#fff;text-decoration:none;border-radius:6px;\"\u003eShop MerCruiser Parts\u003c\/a\u003e\n  \u003cp style=\"font-size:12px;color:#666;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"exhaust-manifold-gasket-fits-mercruiser-volvo-penta-omc-3-0l-engines-replaces-27-815528-3853256","title":"Exhaust Manifold Gasket for MerCruiser, OMC and Volvo Penta 3.0L\/3.0LX 4-Cylinder Engines – Replaces 27-815528, 3853256","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003eExhaust Manifold Gasket\u003c\/strong\u003e is designed for selected MerCruiser, OMC and Volvo Penta stern-drive applications using Chevrolet inline 4-cylinder engines, including MerCruiser 3.0L and 3.0LX models. It is supplied as a single gasket for the exhaust manifold connection.\u003c\/p\u003e\n\u003cp\u003eThe gasket is listed for MerCruiser 27-815528, Volvo Penta 3853256, OMC 914578 and OMC 0914578. It also cross-references to Sierra 18-0680, GLM 33580 and Mallory 9-61428.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSingle exhaust manifold gasket for a 4-cylinder marine engine application.\u003c\/li\u003e\n  \u003cli\u003eDirect replacement design for the listed original-equipment references.\u003c\/li\u003e\n  \u003cli\u003eSuitable for the specific engine models and application ranges shown below.\u003c\/li\u003e\n  \u003cli\u003eVerify the engine model, year range and original gasket before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThe following references are associated with this exhaust manifold gasket. Number references do not replace application verification.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eReference\u003c\/th\u003e\n        \u003cth\u003eReference Type\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e27-815528 \/ 815528\u003c\/td\u003e\n        \u003ctd\u003eOEM reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e3853256\u003c\/td\u003e\n        \u003ctd\u003eOEM reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOMC\u003c\/td\u003e\n        \u003ctd\u003e914578 \/ 0914578\u003c\/td\u003e\n        \u003ctd\u003eOEM reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOMC Stern Drive\u003c\/td\u003e\n        \u003ctd\u003e3853256\u003c\/td\u003e\n        \u003ctd\u003eCross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-0680\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGLM\u003c\/td\u003e\n        \u003ctd\u003e33580\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMallory\u003c\/td\u003e\n        \u003ctd\u003e9-61428\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm the complete engine model and application details before purchase. The listed conditions must match your engine together; a matching part number alone is not sufficient.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel or Application\u003c\/th\u003e\n        \u003cth\u003eEngine Description\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eRelated Reference\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003eModels 120\/140\u003c\/td\u003e\n        \u003ctd\u003eInline 4-cylinder, 153\/181 CID\u003c\/td\u003e\n        \u003ctd\u003e1982–1995\u003c\/td\u003e\n        \u003ctd\u003e27-815528\u003c\/td\u003e\n        \u003ctd\u003eApplication listed by the company catalog.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e3.0LX \/ 3.0L\u003c\/td\u003e\n        \u003ctd\u003eGM 181 CID, inline 4-cylinder\u003c\/td\u003e\n        \u003ctd\u003e1990 and newer\u003c\/td\u003e\n        \u003ctd\u003e27-815528\u003c\/td\u003e\n        \u003ctd\u003eIncludes the MCM 3.0LX and MCM 3.0L application ranges specified by the company.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003eMCM 3.0LX\u003c\/td\u003e\n        \u003ctd\u003eInline 4-cylinder\u003c\/td\u003e\n        \u003ctd\u003e1990–1997\u003c\/td\u003e\n        \u003ctd\u003e27-815528\u003c\/td\u003e\n        \u003ctd\u003eSpecific model range listed by the company.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003eMCM 3.0L\u003c\/td\u003e\n        \u003ctd\u003eInline 4-cylinder\u003c\/td\u003e\n        \u003ctd\u003e1998 and newer\u003c\/td\u003e\n        \u003ctd\u003e27-815528\u003c\/td\u003e\n        \u003ctd\u003eSpecific model range listed by the company.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eVolvo Penta\u003c\/td\u003e\n        \u003ctd\u003e3.0L applications\u003c\/td\u003e\n        \u003ctd\u003eApplication-specific 4-cylinder marine engine\u003c\/td\u003e\n        \u003ctd\u003eVerify by engine model\u003c\/td\u003e\n        \u003ctd\u003e3853256\u003c\/td\u003e\n        \u003ctd\u003eUse the original gasket and engine model to confirm fit.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOMC Cobra\u003c\/td\u003e\n        \u003ctd\u003e3.0L applications\u003c\/td\u003e\n        \u003ctd\u003eApplication-specific 4-cylinder marine engine\u003c\/td\u003e\n        \u003ctd\u003eVerify by engine model\u003c\/td\u003e\n        \u003ctd\u003e914578 \/ 0914578\u003c\/td\u003e\n        \u003ctd\u003eUse the original gasket and engine model to confirm fit.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eExhaust manifold gasket\u003c\/dd\u003e\n  \u003cdt\u003eQuantity\u003c\/dt\u003e\n  \u003cdd\u003e1 gasket\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected marine stern-drive exhaust manifold applications\u003c\/dd\u003e\n  \u003cdt\u003eEngine Configuration\u003c\/dt\u003e\n  \u003cdd\u003eInline 4-cylinder applications as listed above\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eDirect replacement; installation must follow the engine manufacturer's service procedures\u003c\/dd\u003e\n  \u003cdt\u003eBrand Status\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement part\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Exhaust Manifold Gasket\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNo additional manifold, riser gasket, O-ring or complete gasket repair kit is included with this single-gasket listing.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eAllow the engine to cool completely, disconnect the battery and follow the manufacturer's safety procedures.\u003c\/li\u003e\n  \u003cli\u003eDrain or isolate the cooling system as required by the engine service manual.\u003c\/li\u003e\n  \u003cli\u003eRemove the exhaust manifold and discard the old gasket.\u003c\/li\u003e\n  \u003cli\u003eClean the cylinder-head and manifold mating surfaces carefully. Remove old gasket material, rust and debris without damaging the sealing surfaces.\u003c\/li\u003e\n  \u003cli\u003ePosition the new gasket in the correct orientation. Do not apply sealant unless the engine manufacturer's service manual specifically requires it.\u003c\/li\u003e\n  \u003cli\u003eReinstall the manifold and tighten the fasteners in the specified sequence and to the specified torque.\u003c\/li\u003e\n  \u003cli\u003eRestore the cooling system, reconnect the battery and inspect for exhaust or coolant leaks after starting the engine.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a failing exhaust manifold gasket?\u003c\/summary\u003e\n  \u003cp\u003ePossible signs include an exhaust ticking or tapping noise, soot or carbon marks near the manifold joint, exhaust odor in the engine compartment, coolant leakage and reduced engine performance. Inspect the complete exhaust and cooling system before replacing the gasket.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this gasket fit both MerCruiser 3.0L and 3.0LX engines?\u003c\/summary\u003e\n  \u003cp\u003eYes, the company application data lists MCM 3.0L models from 1998 and newer and MCM 3.0LX models from 1990–1997. Earlier MerCruiser 120\/140 inline 4-cylinder applications from 1982–1995 are also listed. Confirm your exact engine model and original gasket before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a complete exhaust manifold gasket kit?\u003c\/summary\u003e\n  \u003cp\u003eNo. This listing is for one exhaust manifold gasket only. It does not include the additional gaskets, O-rings or other components found in separate manifold repair kits.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShould sealant be used during installation?\u003c\/summary\u003e\n  \u003cp\u003eInstall the gasket according to the engine manufacturer's service manual. Do not use sealant unless the manual specifically calls for an approved sealant and application method.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhen should the gasket be replaced?\u003c\/summary\u003e\n  \u003cp\u003eThere is no universal replacement interval. Replace the gasket whenever the manifold is removed or when inspection shows leakage, damage or loss of sealing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM gasket?\u003c\/summary\u003e\n  \u003cp\u003eThis is an aftermarket replacement gasket. MerCruiser, Volvo Penta and OMC references are provided for application identification and cross-reference purposes.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eFitment and Safety Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the engine brand, model, year range, cylinder configuration and original gasket reference before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not rely on a part number alone when several engine versions or exhaust configurations exist.\u003c\/li\u003e\n  \u003cli\u003eCompare the replacement gasket's shape and openings with the removed gasket before installation.\u003c\/li\u003e\n  \u003cli\u003eUse proper ventilation and follow all battery, fuel, cooling-system and hot-engine safety procedures during service.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when the required service procedure or torque specifications are unavailable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — We supply application-focused replacement components for marine engines and stern drives.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication Clarity\u003c\/strong\u003e — Product information is organized around engine models, reference numbers and installation requirements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePractical Support\u003c\/strong\u003e — Compare your original component and confirm fitment details before ordering or installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718264361275,"sku":"23GT304","price":26.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Exhaust_Manifold_Gasket_for_MerCruiser_Stern_Drive_OMC_and_Volvo_Penta_30L_30LX_4-Cyl________27-815528_-_JLM_MARINE-8287571.jpg?v=1762958468"}],"url":"https:\/\/seasierra.com\/collections\/mercruiser-4-stroke-115-140hp-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}