{"title":"Mercury 75-150HP 4-Stroke Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #eee; border-radius:6px;\"\u003e\n  \u003cp\u003eThis page is for Mercury 4-Stroke 75–150HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse the main Mercury collection. Scroll to the bottom of the page to start browsing parts for this engine, and on the collection page use the Filter \u0026amp; Sort controls to narrow results by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#1a73e8; color:#fff; text-decoration:none; border-radius:4px;\"\u003eBrowse All Mercury Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 75–150HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the serial\/nameplate: typically on the transom bracket (starboard side) or the swivel bracket. Take a clear photo before ordering parts.\u003c\/li\u003e\n    \u003cli\u003eRead the model details: look for horsepower (75\/90\/115\/150), shaft length code (L\/XL), and options such as CT (Command Thrust) on some 90\/115 models.\u003c\/li\u003e\n    \u003cli\u003ePlatform differences: 75–115hp FourStroke engines share a common inline‑4 platform; the 150hp FourStroke is a larger inline‑4 with higher charging output.\u003c\/li\u003e\n    \u003cli\u003eControls \u0026amp; electronics: Most models are EFI 4‑Stroke and support SmartCraft depending on year and rigging. Note whether your engine uses a standard or Command Thrust gearcase.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003e75–115hp FourStroke Platform\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; max-width:900px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInline‑4 EFI 4‑Stroke outboards (75\/90\/115hp).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e75 FourStroke, 90 FourStroke, 115 FourStroke; select 90\/115 models available with Command Thrust (CT) gearcase.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eLight weight, smooth and quiet operation, EFI reliability, and robust charging for typical electronics.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eMany service items (filters, anodes, impeller kits) are shared across 75–115hp, but verify by serial. CT gearcases use larger‑diameter propellers and different hub hardware than standard gearcases.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e150hp FourStroke Platform\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; max-width:900px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eLarge‑displacement inline‑4 EFI 4‑Stroke (150hp) with high‑output alternator and idle‑speed charging features.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e150 FourStroke; configurations include L\/XL shaft lengths and various control\/tiller options.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eStrong torque for heavier hulls, efficient weight‑to‑power ratio, and ample charging capacity for onboard electronics.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eService parts (oil filter, spark plugs, thermostat, water pump kit) differ from the 75–115 platform. SmartCraft compatibility varies by rigging; confirm by serial and control setup.\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=\"padding:16px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Mercury 4‑Stroke outboards. Always follow the official service manual and your specific model\/year requirements.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; max-width:1000px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eUse NMMA‑approved FC‑W oil and the correct filter for your platform (75–115 vs 150).\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInspect for water or metal. Replace sealing washers; service seals if contamination is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\"\u003eMercury Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e200–300 hours or as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCheck gap and condition; replace sooner if misfire or hard starting occurs.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eFuel filter \/ water‑separating filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eEFI systems are sensitive to contamination; replace routinely and monitor for water.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e2 seasons or 200 hours (inspect annually)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCritical for cooling; replace more often in sandy\/silty or high‑heat use.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; 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:8px; border-bottom:1px solid #f0f0f0;\"\u003eAnodes (corrosion protection)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInspect every 50 hours; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eChoose alloy for your water (zinc, aluminum, or magnesium).\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; 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      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLower unit seal service (as needed)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eWhen water ingress or oil leakage is detected\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eIf gear lube shows milkiness or leaks at the prop shaft or driveshaft, reseal before further operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eMercury Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/water-pumps\"\u003eWater Pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System: \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-pumps\"\u003eFuel Pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical: \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/rectifiers\"\u003eRectifiers\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\u003eLower Unit Sealing: \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-lower-unit-seal-kits\"\u003eMercury Lower Unit Seal Kits\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  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; max-width:1000px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eWeak tell‑tale stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInspect intake screens, thermostat operation, and impeller condition; verify hose kinks or debris.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eWater pump kit, thermostat, intake screen\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCheck fuel quality, filters, spark plugs, and prop condition\/pitch; look for restricted flow or misfire codes.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eFuel filter, spark plugs, propeller, injectors\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eConfirm battery state of charge, prime bulb, check for air leaks in fuel lines, and inspect plugs.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs, fuel filter, hoses, injectors\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eDrain and inspect lube; check for water intrusion. Inspect prop shaft seal after line\/rope strikes.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eLower unit seal kit, bearings, gear oil\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLow charging voltage\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eVerify belt\/connection integrity, battery health, and regulator\/rectifier output.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eRectifier\/regulator, wiring, battery\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=\"padding:16px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between 75–115hp and 150hp models?\u003c\/summary\u003e\n    \u003cp\u003eSome hardware and accessories may overlap, but major service items (oil filter, plugs, thermostats, water pump kits, and prop hardware) typically differ between the 75–115 platform and the 150 platform. Always confirm by serial number and gearcase type (standard vs Command Thrust).\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 seasons or about 200 hours. In sandy, silty, or high‑temperature use, replace more frequently.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change gear oil?\u003c\/summary\u003e\n    \u003cp\u003eEvery 100 hours or annually, and any time the gearcase has a hard impact or shows signs of water contamination.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the engine serial number, horsepower, approximate year, shaft length (L\/XL), gearcase type (standard or Command Thrust), and control style. A photo of the nameplate and the part being replaced is ideal.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; border-top:1px solid #eee;\"\u003e\n  \u003cp\u003eReady to find parts for your Mercury FourStroke? Browse the main Mercury collection by horsepower, year, and model to zero in on compatible components.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/mercury-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#1a73e8; color:#fff; text-decoration:none; border-radius:4px;\"\u003eShop Mercury Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#555;\"\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":"water-pump-impeller-fits-mercury-mercruiser-omc-johnson-evinrude-65-225-hp-replaces-47-89984t4","title":"Water Pump Impeller with Key for Mercury Mariner 2-Stroke 75–225 HP – Replaces 47-89984T4","description":"\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 { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis aftermarket \u003cstrong\u003ewater pump impeller with key\u003c\/strong\u003e is designed for compatible Mercury Mariner 2-stroke outboard applications from 75 to 225 HP. The impeller helps maintain water circulation through the cooling system and is supplied with the matching key required for installation.\u003c\/p\u003e\n  \u003cp\u003eThe impeller is listed as an aftermarket replacement for \u003cstrong\u003e18-3017\u003c\/strong\u003e and cross-references the following manufacturer part numbers: \u003cstrong\u003e47-803631T, 47-89984T4, 47-F694065, 47-30221, 47-65960, and 47-85460\u003c\/strong\u003e.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eWater pump impeller with key included.\u003c\/li\u003e\n    \u003cli\u003eFor selected Mercury Mariner 2-stroke engines rated 75, 80, 85, 90, 110, 115 through 225 HP.\u003c\/li\u003e\n    \u003cli\u003eDesigned as a direct replacement in a compatible water pump housing.\u003c\/li\u003e\n    \u003cli\u003eAftermarket replacement part; not manufactured by Mercury.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse the references below together with your engine model and serial number to confirm compatibility before ordering.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eReference Type\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eAftermarket reference\u003c\/td\u003e\n\u003ctd\u003e18-3017\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury reference\u003c\/td\u003e\n\u003ctd\u003e47-803631T\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury reference\u003c\/td\u003e\n\u003ctd\u003e47-89984T4\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eForce reference\u003c\/td\u003e\n\u003ctd\u003e47-F694065\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eReference\u003c\/td\u003e\n\u003ctd\u003e47-30221\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eReference\u003c\/td\u003e\n\u003ctd\u003e47-65960\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eReference\u003c\/td\u003e\n\u003ctd\u003e47-85460\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n  \u003cp\u003eThe company fitment record identifies this product for \u003cstrong\u003eMercury Mariner 2-stroke engines rated 75, 80, 85, 90, 110, 115 through 225 HP\u003c\/strong\u003e. Horsepower alone is not sufficient to confirm fitment. Match the original impeller reference and verify the complete model and serial-number range in the applicable service documentation.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Mercury Mariner Compatibility\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eEngine Type\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eFitment Note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003eCompatible outboard applications\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eVerify model and serial number.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003eCompatible outboard applications\u003c\/td\u003e\n\u003ctd\u003e80\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eVerify model and serial number.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003eCompatible outboard applications\u003c\/td\u003e\n\u003ctd\u003e85\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eVerify model and serial number.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003eCompatible outboard applications\u003c\/td\u003e\n\u003ctd\u003e90\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eVerify model and serial number.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003eCompatible outboard applications\u003c\/td\u003e\n\u003ctd\u003e110\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eVerify model and serial number.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury Mariner\u003c\/td\u003e\n\u003ctd\u003eCompatible outboard applications\u003c\/td\u003e\n\u003ctd\u003e115–225\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eVerify model and serial number.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp\u003eThis listing is not presented as a general-fit impeller for OMC, Johnson, Evinrude, or unrelated Force applications. If your engine is not a Mercury Mariner 2-stroke application within the stated range, confirm the original part number and pump dimensions with the manufacturer documentation before purchasing.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eWater pump impeller with key\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eMercury Mariner 2-stroke outboard engines\u003c\/dd\u003e\n    \u003cdt\u003eRated Horsepower Range\u003c\/dt\u003e\n\u003cdd\u003e75, 80, 85, 90, 110, 115–225 HP\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement for compatible water pump assemblies\u003c\/dd\u003e\n    \u003cdt\u003eAftermarket Reference\u003c\/dt\u003e\n\u003cdd\u003e18-3017\u003c\/dd\u003e\n    \u003cdt\u003eKey\u003c\/dt\u003e\n\u003cdd\u003eIncluded\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x aftermarket water pump impeller\u003c\/li\u003e\n    \u003cli\u003e1 x matching impeller key\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eGaskets, seals, wear plates, pump housings, and complete water pump repair-kit components are not included unless specifically stated in the order details.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and follow the engine manufacturer's service procedure.\u003c\/li\u003e\n    \u003cli\u003eRemove the lower unit and water pump cover as specified in the service manual.\u003c\/li\u003e\n    \u003cli\u003eRemove the old impeller and retain the original key only if it is serviceable and the service manual permits reuse.\u003c\/li\u003e\n    \u003cli\u003eClean the pump housing and wear surfaces. Replace damaged or excessively worn components before installation.\u003c\/li\u003e\n    \u003cli\u003eInstall the supplied key in the driveshaft keyway, then install the impeller in the correct orientation.\u003c\/li\u003e\n    \u003cli\u003eReinstall the pump housing and lower unit using the manufacturer's torque specifications and sealing procedure.\u003c\/li\u003e\n    \u003cli\u003eRun the engine only in water or with an appropriate flushing device. Confirm a steady cooling-water tell-tale stream and check for leaks or overheating.\u003c\/li\u003e\n  \u003c\/ol\u003e\n  \u003cp\u003eProfessional installation is recommended if you are not familiar with outboard lower-unit or water-pump service.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm that this impeller fits my engine?\u003c\/summary\u003e\n    \u003cp\u003eCheck the original impeller or service-manual part number, then compare it with the references listed above. Also verify that your engine is a Mercury Mariner 2-stroke application in the stated 75, 80, 85, 90, 110, 115–225 HP range and confirm the model and serial number.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are common signs of a worn impeller?\u003c\/summary\u003e\n    \u003cp\u003ePossible symptoms include a weak or missing tell-tale stream, overheating, steam, or visibly cracked, hardened, or damaged impeller blades. Inspect the pump housing and wear surfaces whenever the impeller is replaced.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs the key included?\u003c\/summary\u003e\n    \u003cp\u003eYes. This product is supplied as a water pump impeller with the matching key.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this include gaskets or a complete pump kit?\u003c\/summary\u003e\n    \u003cp\u003eNo. The package contains one impeller and one key. Gaskets, seals, wear plates, and other water-pump components are sold separately unless expressly included in the order details.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement. The manufacturer and reference numbers are supplied only to help identify the intended application and cross-reference the replacement.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should an impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eInspect the impeller according to your engine manufacturer's maintenance schedule and replace it whenever it shows wear, deformation, cracking, hardening, or reduced cooling performance. Frequent saltwater, sandy, or silty use may require more frequent inspection.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the complete engine model, serial number, original part number, and pump configuration before ordering.\u003c\/li\u003e\n    \u003cli\u003eDo not rely on horsepower alone to establish compatibility.\u003c\/li\u003e\n    \u003cli\u003eDo not operate an outboard engine without an adequate water supply.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eStop operation immediately if the engine overheats or the cooling-water tell-tale stream is weak or absent.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — Practical aftermarket components for routine maintenance and repair.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFitment-Focused Listings\u003c\/strong\u003e — Product references and application information are provided to help customers verify compatibility before ordering.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGlobal Fulfillment\u003c\/strong\u003e — Standard and expedited delivery options are shown at checkout where available.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723981492539,"sku":"17IC004-K","price":18.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Mercury_-__Mercruiser_-_OMC_-_Johnson_-_Evinrude_Impeller_Service_Set_65_to_225_hp_47-89984T4_-_JLM_MARINE-8289798.jpg?v=1763039268"},{"product_id":"thermostat-kit-fits-mercury-mariner-75-150-hp-4-stroke-efi-replaces-892864t06-892864a06","title":"Thermostat Assembly for Mercury\/Mariner 75–115 HP EFI and 150 EFI 4-Stroke Outboards – Replaces 892864T06, 8M0090819, 892864A06","description":"\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 { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis thermostat assembly is a direct-fit replacement for selected Mercury and Mariner 4-stroke EFI outboards. The company application data identifies it for 75–115 HP EFI and 150 EFI models. It is supplied as a single thermostat assembly, not as a multi-piece thermostat kit with a separate housing, O-ring, or clamp.\u003c\/p\u003e\n  \u003cp\u003eThe thermostat regulates engine cooling-system temperature and is rated at approximately 50°C (122°F). Always confirm the required thermostat temperature, engine model, and serial number in the owner's or service manual before installation.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eReplacement thermostat assembly for selected Mercury\/Mariner EFI 4-stroke outboards.\u003c\/li\u003e\n    \u003cli\u003eCustomer-facing OEM references include Mercury 892864T06, 8M0090819, and 892864A06.\u003c\/li\u003e\n    \u003cli\u003eCross-references include Sierra 18-3635 and 18-3633.\u003c\/li\u003e\n    \u003cli\u003eSold as one thermostat assembly; additional housing or sealing components are not specified as included for this product.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse these references to compare the thermostat required for your engine. Part-number references do not replace model and serial-number 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\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eReference Type\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\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e892864T06\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003ctd\u003eThermostat reference for the listed EFI applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e8M0090819\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003ctd\u003eQuicksilver\/Mercury thermostat assembly reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e892864A06\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003ctd\u003eAdditional company-listed Mercury reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3635\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n\u003ctd\u003eThermostat reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3633\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n\u003ctd\u003eThermostat reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eFitment depends on the complete engine application, including horsepower, stroke, model, and serial number. The following conditions should be treated together when checking compatibility.\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\/Application\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eSerial Condition\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003eEFI outboard\u003c\/td\u003e\n\u003ctd\u003e75–115 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1B366823 through 2B094995\u003c\/td\u003e\n\u003ctd\u003e892864T06 \/ 8M0090819\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003eEFI outboard\u003c\/td\u003e\n\u003ctd\u003e150 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1B905505 and up\u003c\/td\u003e\n\u003ctd\u003e8M0090819\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp\u003eSome catalogs distinguish between thermostat-only and thermostat-with-housing applications. Verify the original component and the exact engine serial number before ordering.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003eThermostat assembly\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n    \u003cdd\u003eMercury\/Mariner EFI 4-stroke outboards\u003c\/dd\u003e\n    \u003cdt\u003eRated Temperature\u003c\/dt\u003e\n    \u003cdd\u003eApproximately 50°C (122°F)\u003c\/dd\u003e\n    \u003cdt\u003eProduct Configuration\u003c\/dt\u003e\n    \u003cdd\u003eSingle thermostat assembly\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eDirect-fit replacement when the application and serial number match\u003c\/dd\u003e\n    \u003cdt\u003eFuel Type\u003c\/dt\u003e\n    \u003cdd\u003eGasoline outboard application\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Thermostat assembly\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eA housing, O-ring, clamp, gasket, or other installation hardware is not identified as included in the company package data. Reuse or replacement of surrounding components should be determined from the engine service manual and the condition of the original parts.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eConfirm the engine model, horsepower, stroke, and serial number before beginning work.\u003c\/li\u003e\n    \u003cli\u003eAllow the engine to cool completely and follow the service manual's cooling-system safety procedure.\u003c\/li\u003e\n    \u003cli\u003eDisconnect the battery if required by the manufacturer's service instructions.\u003c\/li\u003e\n    \u003cli\u003eLocate the thermostat according to the engine service manual and remove the required cover or housing components.\u003c\/li\u003e\n    \u003cli\u003eNote the orientation of the original thermostat before removal.\u003c\/li\u003e\n    \u003cli\u003eClean the sealing surfaces and inspect the housing, fasteners, gasket, and O-ring for damage or corrosion.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement thermostat in the specified orientation.\u003c\/li\u003e\n    \u003cli\u003eInstall any required gasket or seal specified by the engine service manual; these items are not identified as included with this single thermostat assembly.\u003c\/li\u003e\n    \u003cli\u003eReinstall the cover or housing and tighten fasteners to the manufacturer's specified torque.\u003c\/li\u003e\n    \u003cli\u003eRestore the cooling system as required, start the engine, and check for leaks and proper operating temperature.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if my thermostat is failing?\u003c\/summary\u003e\n    \u003cp\u003ePossible symptoms include overheating, an engine that runs below its normal operating temperature, unstable temperature readings, or cooling-system leakage near the thermostat cover. Diagnose the cooling system using the engine service manual before replacing parts.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this fit an engine that is not listed?\u003c\/summary\u003e\n    \u003cp\u003eDo not assume fitment from horsepower alone. Match the engine brand, model, stroke, horsepower, and serial number to the applicable catalog or service-manual information. If those details do not match, select a different verified application.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat temperature is this thermostat?\u003c\/summary\u003e\n    \u003cp\u003eThe company data identifies this application as approximately 50°C (122°F). Use only the temperature rating specified for your particular engine in its owner's or service manual.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this include the thermostat housing, O-ring, and clamp?\u003c\/summary\u003e\n    \u003cp\u003eNo complete kit contents are specified for this product. The company record identifies it as a single thermostat assembly, so a housing, O-ring, clamp, gasket, or other hardware should not be assumed to be included.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I reuse the old housing or seal?\u003c\/summary\u003e\n    \u003cp\u003eInspect those parts and follow the engine service manual. Replace any worn, damaged, corroded, or hardened sealing components before returning the engine to service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is for a replacement thermostat assembly. Mercury OEM reference numbers are provided for identification and fitment comparison; the replacement should not be represented as a genuine Mercury-branded part unless the physical part and packaging are specifically identified as genuine OEM.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should the thermostat be replaced?\u003c\/summary\u003e\n    \u003cp\u003eInspect and service the thermostat according to the engine manufacturer's maintenance schedule. Replacement may also be appropriate when the thermostat is sticking, corroded, damaged, or associated with abnormal engine temperature.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping speed and cost\u003c\/summary\u003e\n    \u003cp\u003eShipping methods, delivery estimates, and available costs are shown at checkout and may vary by destination.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty and returns\u003c\/summary\u003e\n    \u003cp\u003eWarranty and return eligibility are governed by the applicable store policies. Contact customer support with your order details before returning a product.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the engine model, year when applicable, horsepower, stroke, and serial number before purchase.\u003c\/li\u003e\n    \u003cli\u003eUse only the thermostat temperature specified for the engine.\u003c\/li\u003e\n    \u003cli\u003eDo not operate the engine if the thermostat cover leaks or the temperature remains abnormal after installation.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when the required service procedure or torque specifications are unknown.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMarine Parts Support\u003c\/strong\u003e — We provide replacement components for common marine maintenance and repair applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFitment-Focused Information\u003c\/strong\u003e — Model, serial, and part-number references are presented to help customers verify compatibility.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGlobal Fulfillment\u003c\/strong\u003e — Available shipping methods and delivery estimates are presented during checkout.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723982999867,"sku":"21TH010","price":53.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Thermostat_Kit_for_Mercury_75-150_HP_892864T06_-_892864A06_-_Sierra_18-3635-K_-_JLM_MARINE-8290884.jpg?v=1763039349"},{"product_id":"oil-filter-fits-mercury-mariner-75-150hp-4-stroke-replaces-35-877761k01-35-877761q01-18-7758","title":"Aftermarket Oil Filter for Mercury\/Mariner 4-Stroke Outboards – Replaces 35-877761Q01, 35-877761K01 and Sierra 18-7758","description":"\u003csection\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\u003eoil filter\u003c\/strong\u003e is intended for selected Mercury and Mariner four-stroke outboards. It is listed for use with Mercury 75, 80, 90, 100 and 115 HP EFI four-stroke models using the applicable serial-number ranges shown below. The filter is also cataloged as a replacement for Mercury part numbers \u003cstrong\u003e35-877761Q01\u003c\/strong\u003e and \u003cstrong\u003e35-877761K01\u003c\/strong\u003e, with Sierra reference \u003cstrong\u003e18-7758\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe spin-on design supports straightforward routine oil-service work. Always compare the part number and engine serial number with your engine documentation before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAftermarket replacement oil filter for Mercury\/Mariner applications.\u003c\/li\u003e\n  \u003cli\u003eSpin-on installation for convenient servicing.\u003c\/li\u003e\n  \u003cli\u003e22 mm x 1.5 thread specification.\u003c\/li\u003e\n  \u003cli\u003eAnti-drain-back valve design helps limit oil drain-back during engine shutdown.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThese references are provided for identification and cross-reference purposes. They do not indicate that the product is manufactured by Mercury, Sierra or Mallory.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand or Reference Type\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eRelationship\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e35-877761Q01\u003c\/td\u003e\n        \u003ctd\u003ePrimary OEM reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e35-877761K01\u003c\/td\u003e\n        \u003ctd\u003eReplacement reference\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-7758\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\u003eThe catalog relationships below keep the model, horsepower, stroke and serial conditions together. Confirm the complete engine model and serial number before ordering; horsepower alone is not sufficient to establish fitment.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine Model Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eApplicable Reference\u003c\/th\u003e\n        \u003cth\u003eSerial Condition\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e75 EFI\u003c\/td\u003e\n        \u003ctd\u003e75\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e35-877761Q01\u003c\/td\u003e\n        \u003ctd\u003e1B366823 through 2B094995\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e80 EFI\u003c\/td\u003e\n        \u003ctd\u003e80\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e35-877761Q01\u003c\/td\u003e\n        \u003ctd\u003e1B366823 through 2B094995\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e80 EFI\u003c\/td\u003e\n        \u003ctd\u003e80\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e35-877761Q01\u003c\/td\u003e\n        \u003ctd\u003e0P459572 through 2B094995\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e90 EFI\u003c\/td\u003e\n        \u003ctd\u003e90\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e35-877761Q01\u003c\/td\u003e\n        \u003ctd\u003e1B366823 through 2B094995\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e100 EFI\u003c\/td\u003e\n        \u003ctd\u003e100\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e35-877761Q01\u003c\/td\u003e\n        \u003ctd\u003e1B366823 through 2B094995\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e100 EFI\u003c\/td\u003e\n        \u003ctd\u003e100\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e35-877761Q01\u003c\/td\u003e\n        \u003ctd\u003e0P459572 through 2B094995\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e115 EFI\u003c\/td\u003e\n        \u003ctd\u003e115\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e35-877761Q01\u003c\/td\u003e\n        \u003ctd\u003e1B366823 through 2B094995\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e150\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e35-877761K01\u003c\/td\u003e\n        \u003ctd\u003e1B905505 and up\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eOil filter\u003c\/dd\u003e\n  \u003cdt\u003eProduct Construction\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement component\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eSpin-on\u003c\/dd\u003e\n  \u003cdt\u003eThread Specification\u003c\/dt\u003e\n  \u003cdd\u003e22 mm x 1.5\u003c\/dd\u003e\n  \u003cdt\u003eValve Feature\u003c\/dt\u003e\n  \u003cdd\u003eAnti-drain-back valve\u003c\/dd\u003e\n  \u003cdt\u003ePrimary OEM Reference\u003c\/dt\u003e\n  \u003cdd\u003eMercury 35-877761Q01\u003c\/dd\u003e\n  \u003cdt\u003eAdditional Replacement Reference\u003c\/dt\u003e\n  \u003cdd\u003eMercury 35-877761K01\u003c\/dd\u003e\n  \u003cdt\u003eAftermarket Cross-Reference\u003c\/dt\u003e\n  \u003cdd\u003eSierra 18-7758\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 aftermarket spin-on oil filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eConfirm the replacement references and engine serial number before beginning service.\u003c\/li\u003e\n  \u003cli\u003ePlace a suitable drain pan beneath the existing oil filter.\u003c\/li\u003e\n  \u003cli\u003eLoosen and remove the old filter using an appropriate filter wrench if necessary.\u003c\/li\u003e\n  \u003cli\u003eClean the filter mounting surface and check that the old gasket has been removed.\u003c\/li\u003e\n  \u003cli\u003eApply a thin film of clean engine oil to the new filter gasket.\u003c\/li\u003e\n  \u003cli\u003eThread the new filter onto the mounting base by hand until the gasket contacts the base.\u003c\/li\u003e\n  \u003cli\u003eTighten according to the engine manufacturer’s service instructions. Do not overtighten.\u003c\/li\u003e\n  \u003cli\u003eCheck the oil level, run the engine, and inspect the filter area for leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eMaintenance \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm this filter fits my engine?\u003c\/summary\u003e\u003cp\u003eMatch your existing filter reference and verify the complete engine model, four-stroke configuration, horsepower and serial number. The cataloged applications include Mercury 75, 80, 90, 100 and 115 HP EFI models with the serial ranges listed above, plus a Mercury 150 HP four-stroke application using reference 35-877761K01 from serial 1B905505 and up.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM filter?\u003c\/summary\u003e\u003cp\u003eNo. This listing is for an aftermarket replacement oil filter. It is cross-referenced to Mercury 35-877761Q01 and 35-877761K01 and to Sierra 18-7758.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat does the anti-drain-back valve do?\u003c\/summary\u003e\u003cp\u003eThe anti-drain-back valve helps prevent oil from draining back toward the crankcase while the engine is shut down, helping reduce dry-start conditions.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhen should the oil filter be replaced?\u003c\/summary\u003e\u003cp\u003eReplace the filter according to the maintenance schedule for your specific engine and oil-service interval. If the engine manufacturer specifies a different interval, follow that guidance.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat should I do if the filter leaks after installation?\u003c\/summary\u003e\u003cp\u003eStop the engine, allow the filter area to cool, and check that the old gasket was removed, the new gasket is seated correctly, and the filter was tightened according to the service instructions. Do not operate the engine with an active oil leak.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the complete engine serial number and the reference on your original filter before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not rely on horsepower alone to determine compatibility.\u003c\/li\u003e\n  \u003cli\u003eUse the correct engine oil and follow the engine manufacturer’s service procedure.\u003c\/li\u003e\n  \u003cli\u003eDispose of used oil and the old filter in accordance with local regulations.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not a Mercury-branded OEM component.\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 Parts Support\u003c\/strong\u003e — We provide replacement components for routine marine maintenance and repair.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Product references and fitment conditions are presented to help customers verify the correct part.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplacement Value\u003c\/strong\u003e — Aftermarket options help support dependable servicing without representing themselves as original manufacturer components.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723983065403,"sku":"23OF801","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Oil_Filter_for_Mercury_75_90_115_HP___18-7758_-_JLM_MARINE-8286664.jpg?v=1763039352"}],"url":"https:\/\/seasierra.com\/collections\/mercury-75-150hp-4-stroke-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}