{"title":"Mercury MerCruiser 4.3L 4-Stroke Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e5e5; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page is for Mercury MerCruiser 4.3L 4‑Stroke sterndrive engines. It helps you find compatible parts and service information, including maintenance tips, common replacement parts, 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 on the collection page use the “Filter \u0026amp; Sort” controls to narrow results by horsepower, year range, and part category\/section.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\" style=\"display:inline-block; padding:10px 16px; background:#1a73e8; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All MerCruiser Parts\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 4.3L Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate serial numbers: the engine serial is typically on a tag near the flywheel housing or flame arrestor; the sterndrive (Alpha\/Bravo) serial is on the drive or transom assembly tag. Photograph both.\u003c\/li\u003e\n    \u003cli\u003eModel descriptors: 4.3L variants include Carb\/TKS and EFI\/MPI. The label on the flame arrestor cover or ECM harness usually indicates the fuel system type.\u003c\/li\u003e\n    \u003cli\u003eDrive type matters: Many 4.3L packages were paired with Alpha One (Gen II) or Bravo drives. Parts such as water pump components and gear lube seals differ by drive.\u003c\/li\u003e\n    \u003cli\u003eOther identifiers: Note alternator style, belt layout (serpentine vs V‑belt), and presence of coolers or sea pump—these affect belt, pump, and hose selection.\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  \u003ch3\u003e4.3L Carb\/TKS V6\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;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003e90° V6, pushrod 4‑stroke, carbureted\/TKS fuel system\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e4.3L with Alpha One Gen II or Bravo; typical earlier MerCruiser 4.3L carb packages\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eSimplicity, easy troubleshooting, widely available service parts\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eWater pump location varies by drive; ignition and fuel parts differ from EFI\/MPI variants\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003e4.3L MPI EFI V6\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; max-width:900px; border-collapse:collapse; margin-top:10px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003e90° V6, pushrod 4‑stroke, multi‑port fuel injection with ECM control\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e4.3L MPI packages often paired with Alpha or Bravo drives (many 2000s and newer)\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eImproved cold starting, better fuel economy, stronger mid‑range torque\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eUses sensors (IAC, MAP, etc.) and a serpentine belt on many setups; follow EFI‑specific service procedures\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; always follow the official Mercury MerCruiser service manual for your exact engine and drive.\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;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eEngine oil \u0026amp; filter\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eUse marine‑rated FC‑W oil; change filter with each oil change\u003c\/td\u003e\n        \u003ctd\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\u003eGear oil (sterndrive)\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eInspect for water or metal; replace drain\/vent seals\u003c\/td\u003e\n        \u003ctd\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      \u003ctr\u003e\n        \u003ctd\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eVerify correct gap and heat range for your 4.3L variant\u003c\/td\u003e\n        \u003ctd\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\u003eFuel filter \/ water separator\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eReplace the canister; drain and inspect for water\/debris\u003c\/td\u003e\n        \u003ctd\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\u003eRaw‑water pump impeller\u003c\/td\u003e\n        \u003ctd\u003eEvery 2–3 years (or sooner in sandy\/silty water)\u003c\/td\u003e\n        \u003ctd\u003eDrive‑mounted (Alpha) or engine sea pump (many Bravo) depending on package\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-impellers\"\u003eMerCruiser Impellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAnodes\u003c\/td\u003e\n        \u003ctd\u003eInspect every 50 hours; replace at ~50% loss\u003c\/td\u003e\n        \u003ctd\u003eMatch alloy to water type (aluminum, zinc, magnesium)\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-anodes\"\u003eMerCruiser Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSerpentine belt\u003c\/td\u003e\n        \u003ctd\u003eInspect every 100 hours; replace if worn\u003c\/td\u003e\n        \u003ctd\u003eListen for chirp\/squeal; check tensioner and pulleys\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelt\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eThermostat\u003c\/td\u003e\n        \u003ctd\u003eEvery 2–3 years\u003c\/td\u003e\n        \u003ctd\u003eReplace if running too cool or frequent overheat alarms\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\"\u003eMerCruiser\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eIAC\/air filter (EFI\/MPI)\u003c\/td\u003e\n        \u003ctd\u003eInspect annually\u003c\/td\u003e\n        \u003ctd\u003eClean\/replace the IAC muffler or intake filter as equipped\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-air-filters\"\u003eMerCruiser Air Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eDrain plug seals\u003c\/td\u003e\n        \u003ctd\u003eWith each gear lube change\u003c\/td\u003e\n        \u003ctd\u003eReplace to prevent water intrusion in the drive\u003c\/td\u003e\n        \u003ctd\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\/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\/mercruiser-impellers\"\u003eMerCruiser Impellers\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\/sensors\"\u003eSensors\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-anodes\"\u003eMerCruiser Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion – \u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser-propellers\"\u003eMerCruiser Propellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGaskets \u0026amp; Seals – \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=\"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;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHigh temperature alarm \/ overheating\u003c\/td\u003e\n        \u003ctd\u003eInspect intake screens, sea strainer, impeller condition, and thermostat operation\u003c\/td\u003e\n        \u003ctd\u003eWater pump impeller kit, thermostat, anodes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd\u003eCheck fuel quality, water separator, IAC operation (EFI\/MPI), and spark plug condition\u003c\/td\u003e\n        \u003ctd\u003eFuel filter\/water separator, IAC air filter, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd\u003eLook for damaged or incorrect prop pitch, restricted fuel supply, fouled plugs\u003c\/td\u003e\n        \u003ctd\u003ePropeller, fuel filter, spark plugs, fuel pump\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise or metal in gear lube\u003c\/td\u003e\n        \u003ctd\u003eVerify oil level\/condition; check for water intrusion from worn seals\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, drain plug seals, bearings\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eBelt squeal or charging issues\u003c\/td\u003e\n        \u003ctd\u003eInspect serpentine belt wear\/tension and alternator pulley alignment\u003c\/td\u003e\n        \u003ctd\u003eBelt, alternator\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 carbureted 4.3L and 4.3L MPI engines?\u003c\/summary\u003e\n    \u003cp\u003eMany items differ, including fuel delivery components, some sensors, and calibration‑specific parts. Confirm your exact fuel system (Carb\/TKS vs MPI) and both engine and drive serial numbers before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the raw‑water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eReplace every 2–3 years under normal use, or sooner if you run in sandy\/silty water, see elevated temperatures at idle, or find vanes set\/hardened during inspection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should sterndrive gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eChange gear oil at least every 100 hours or at the end of each season. Inspect for milky appearance (water) or metal, and replace drain\/vent seals each time.\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, sterndrive serial number (Alpha\/Bravo), model year if known, fuel system type (Carb\/TKS or MPI), and any visible option details (serpentine belt, sea pump, coolers).\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; border-top:1px solid #e5e5e5;\"\u003e\n  \u003cp\u003eReady to find the right parts? Browse the main MerCruiser collection by model, year range, and category.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/mercruiser\" style=\"display:inline-block; padding:10px 16px; background:#1a73e8; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop MerCruiser Parts\u003c\/a\u003e\u003c\/p\u003e\n  \u003cp style=\"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-circulating-pump-fits-mercury-mercruiser-2-5l-6-2l-replaces-65142a1-884727-814755","title":"Water Circulating Pump – Fits Mercury MerCruiser 2.5L-6.2L (Replaces 65142A1, 884727, 814755)","description":"\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\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\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\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\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis aftermarket \u003cstrong\u003eWater Circulating Pump\u003c\/strong\u003e is engineered for a precise fit on a wide range of Mercury MerCruiser engines, including 2.5L, 3.0L, 4.3L, 5.0L, 5.7L, and 6.2L models, covering popular applications like the 350, 377, and 383 MPI series. It ensures reliable coolant flow to maintain optimal engine temperature during marine operations.\u003c\/p\u003e\n  \u003cp\u003eThis component is a direct replacement for multiple part numbers, including Mercury MerCruiser 65142A1, Sierra 18-3575, Mallory 9-42605, and GLM 15100, providing broad interchange compatibility.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eEngineered for direct-fit installation on specified MerCruiser sterndrive models.\u003c\/li\u003e\n    \u003cli\u003eFeatures a special marine design to withstand harsh saltwater and freshwater environments.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e65142A1\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e884727\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e814755\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e8M0113733\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e880817\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e65142\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e52353\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e37369\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e33957\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3575\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-42605\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e15100\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 your engine model\/year in the table below.\u003c\/p\u003e\n  \u003cp\u003eThis pump is designed for the following Mercury MerCruiser engines. Always cross-reference your engine's part number to ensure correct fitment.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; 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\u003eOEM Part No.\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 MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e2.5L\u003c\/td\u003e\n        \u003ctd\u003e120\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e65142A1\u003c\/td\u003e\n        \u003ctd\u003eGM inline-4 engine\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e3.0L\u003c\/td\u003e\n        \u003ctd\u003e140\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e65142A1\u003c\/td\u003e\n        \u003ctd\u003eGM 181 CID inline-4 engine\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e4.3L\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e65142A1\u003c\/td\u003e\n        \u003ctd\u003eGM V6 engine\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.0L\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e65142A1\u003c\/td\u003e\n        \u003ctd\u003eGM V8 engine\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.7L\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e65142A1\u003c\/td\u003e\n        \u003ctd\u003eGM V8 engine\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e6.2L\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e65142A1\u003c\/td\u003e\n        \u003ctd\u003eGM V8 engine\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e350 MPI\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e65142A1\u003c\/td\u003e\n        \u003ctd\u003eGM V8 engine\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e377 MPI\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e65142A1\u003c\/td\u003e\n        \u003ctd\u003eGM V8 engine\u003c\/td\u003e\n      \u003c\/tr\u003e\n       \u003ctr\u003e\n        \u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n        \u003ctd\u003e383 MPI\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e65142A1\u003c\/td\u003e\n        \u003ctd\u003eGM V8 engine\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\u003eWater Circulating Pump\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement for MerCruiser sterndrive models\u003c\/dd\u003e\n    \u003cdt\u003eOEM Part Numbers\u003c\/dt\u003e\n\u003cdd\u003e65142A1, 884727, 814755, 8M0113733, 880817, 65142, 52353, 37369, 33957\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eSpecial marine design\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 Water Circulating Pump (Replaces 65142A1)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the boat's battery before beginning work.\u003c\/li\u003e\n    \u003cli\u003eDrain the closed-cooling section of the engine block into a suitable container.\u003c\/li\u003e\n    \u003cli\u003eLoosen the clamps and remove the water hoses connected to the pump.\u003c\/li\u003e\n    \u003cli\u003eRemove the serpentine or V-belt from the pump pulley.\u003c\/li\u003e\n    \u003cli\u003eUnbolt and carefully remove the old water circulating pump from the engine block.\u003c\/li\u003e\n    \u003cli\u003eThoroughly clean the gasket mating surface on the engine block, removing all old gasket material and sealant.\u003c\/li\u003e\n    \u003cli\u003ePlace the new gasket on the engine block, followed by the new pump.\u003c\/li\u003e\n    \u003cli\u003eInstall and tighten the mounting bolts to the manufacturer's specified torque in a crisscross pattern.\u003c\/li\u003e\n    \u003cli\u003eReinstall the belt and ensure it is tensioned correctly.\u003c\/li\u003e\n    \u003cli\u003eReconnect the water hoses and tighten the clamps securely.\u003c\/li\u003e\n    \u003cli\u003eRefill the cooling system with the appropriate coolant mixture.\u003c\/li\u003e\n    \u003cli\u003eReconnect the battery, start the engine, and carefully inspect for any leaks around the pump and hoses.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if my water circulating pump is failing?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs of a failing circulating pump include the engine overheating at idle or low speeds, visible coolant leaks from the pump's weep hole or mounting gasket, a wobbling pulley, or a high-pitched whining or grinding sound coming from the pump area.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this fit my specific engine model year?\u003c\/summary\u003e\n    \u003cp\u003eThis pump fits a wide range of models, as listed in the Engine \u0026amp; Model Compatibility table. However, the most reliable method for confirming fitment is to match the part number from your old pump to the numbers listed in our Part Number Matrix.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the difference between a raw water pump and a circulating pump?\u003c\/summary\u003e\n    \u003cp\u003eA raw water pump draws external (sea, lake) water to cool the engine (either directly or via a heat exchanger). A circulating pump, like this one, circulates coolant through the engine block and components on the \"closed\" side of the cooling system.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs a gasket included with this pump?\u003c\/summary\u003e\n    \u003cp\u003ePlease refer to the \"What's in the Box\" section for a list of included components. It is critical to use a new gasket during installation to ensure a proper seal. If a gasket is not included, it must be purchased separately.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch inspections for consistency.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n    \u003cp\u003eWe ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n    \u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. See our policy page or reach out for instructions.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify images and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723791962427,"sku":"23FF054","price":75.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Circulation_Water_Pump_for_MerCruiser_Sterndrive_65142A1_-_JLM_MARINE-8285766.jpg?v=1763031901"},{"product_id":"water-drain-distribution-housing-fits-mercury-mercruiser-4-3l-6-2l-replaces-863444t1-863444a1-863802t2-863444t2","title":"Water Drain Distribution Housing – Fits Mercury MerCruiser 4.3L-6.2L (Replaces 863444T1, 863444A1, 863802T2, 863444T2)","description":"\u003csection\u003e\n\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\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\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\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 is a direct-replacement \u003cstrong\u003eWater Drain Distribution Housing – Fits Mercury MerCruiser 4.3L 5.0L 5.7L 6.2L Engines\u003c\/strong\u003e. It is designed for compatibility with MerCruiser 262 CID (4.3L), 305 CID (5.0L), 350 CID (5.7L), and 377 CID (6.2L) V6 and V8 engines, including MAG, MPI, MIE, and SKI models from 1998 and newer.\u003c\/p\u003e\n\u003cp\u003eThis assembly provides a direct interchange for Mercury MerCruiser OEM part numbers 863444T1, 863444A1, 863802T2, 863444T2, and 863631T1.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls directly to the engine block as per factory specifications.\u003c\/li\u003e\n\u003cli\u003eEngineered for use in standard marine cooling system environments.\u003c\/li\u003e\n\u003cli\u003eKit includes all necessary drain plugs and O-rings for a complete installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e863444A1\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e863802T2\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e863444T2\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e863631T1\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 your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eFor Mercury MerCruiser engines, please verify your model and year range. This part is compatible with a wide range of MPI, MIE, and Bravo\/Alpha sterndrive configurations from 1998 onward.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; 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\u003eYears\u003c\/th\u003e\n        \u003cth\u003eOEM Part No.\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 MerCruiser\u003c\/td\u003e\n\u003ctd\u003e4.3L MPI ALPHA\/BRAVO\u003c\/td\u003e\n\u003ctd\u003e4.3L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e4.3L MPI ALPHA\/BRAVO EC\u003c\/td\u003e\n\u003ctd\u003e4.3L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e5.0L MPI ALPHA\/BRAVO\u003c\/td\u003e\n\u003ctd\u003e5.0L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e5.0L MPI ALPHA\/BRAVO EC\u003c\/td\u003e\n\u003ctd\u003e5.0L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e5.7L MPI MIE\u003c\/td\u003e\n\u003ctd\u003e5.7L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e5.7L MPI MIE EC\u003c\/td\u003e\n\u003ctd\u003e5.7L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e5.7L MPI SKI\u003c\/td\u003e\n\u003ctd\u003e5.7L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e5.7L MPI TOWSPORT WITH GEN III\u003c\/td\u003e\n\u003ctd\u003e5.7L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e5.7L SKI EC\u003c\/td\u003e\n\u003ctd\u003e5.7L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e350 MAG MPI ALPHA\/BRAVO\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e350 MAG MPI ALPHA\/BRAVO EC\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e350 MAG MPI HORIZON ALPHA\/BRAVO\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e350 MAG MPI HORIZON ALPHA\/BRAVO EC\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e350 MAG MPI HORIZON MIE\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e350 MAG MPI MIE\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e350 MAG MPI SKI\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e350 MPI ALPHA\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003eSCORPION 350 EC\u003c\/td\u003e\n\u003ctd\u003e350\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e377 MAG MPI BRAVO\u003c\/td\u003e\n\u003ctd\u003e377\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e377 MAG MPI BRAVO EC\u003c\/td\u003e\n\u003ctd\u003e377\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003eSCORPION 377 HO EC\u003c\/td\u003e\n\u003ctd\u003e377\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e383 MAG STROKER INBOARD\u003c\/td\u003e\n\u003ctd\u003e383\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e6.2L MPI MIE\u003c\/td\u003e\n\u003ctd\u003e6.2L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1s\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e6.2L MPI MIE EC\u003c\/td\u003e\n\u003ctd\u003e6.2L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003e6.2L MPI HORIZON MIE\u003c\/td\u003e\n\u003ctd\u003e6.2L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003eMX 6.2L MPI BRAVO\u003c\/td\u003e\n\u003ctd\u003e6.2L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003eMX 6.2L MPI HORIZON BRAVO\u003c\/td\u003e\n\u003ctd\u003e6.2L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003eMX 6.2L MPI HORIZON MIE\u003c\/td\u003e\n\u003ctd\u003e6.2L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003eMX 6.2L MPI MIE\u003c\/td\u003e\n\u003ctd\u003e6.2L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury MerCruiser\u003c\/td\u003e\n\u003ctd\u003eMX 6.2L MPI SKI\u003c\/td\u003e\n\u003ctd\u003e6.2L\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998+\u003c\/td\u003e\n\u003ctd\u003e863444T1\u003c\/td\u003e\n\u003ctd\u003e\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\u003eWater Drain Distribution Housing Assembly\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n  \u003cdt\u003eConnection\u003c\/dt\u003e\n\u003cdd\u003eDirect mount to engine block\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eMetal (Aluminum) and plastic components\u003c\/dd\u003e\n  \u003cdt\u003eHousing Color\u003c\/dt\u003e\n\u003cdd\u003eSilver\/Gray (natural aluminum)\u003c\/dd\u003e\n  \u003cdt\u003eDimensions\u003c\/dt\u003e\n\u003cdd\u003eAs per OEM specifications\u003c\/dd\u003e\n  \u003cdt\u003eFitting Type\u003c\/dt\u003e\n\u003cdd\u003eManual drain plugs with screw-in installation\u003c\/dd\u003e\n  \u003cdt\u003eOther Attributes\u003c\/dt\u003e\n\u003cdd\u003eFeatures manual drain functionality; standard cooling system compatible\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 Water Distribution Housing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2\u003c\/span\u003e x Manual Drain Plugs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2\u003c\/span\u003e x O-Rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the boat's battery for safety.\u003c\/li\u003e\n  \u003cli\u003eDrain the engine cooling system completely to avoid spills. Place a catch pan under the engine.\u003c\/li\u003e\n  \u003cli\u003eCarefully disconnect all hoses attached to the old water distribution housing.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and remove the old housing from the engine block.\u003c\/li\u003e\n  \u003cli\u003eThoroughly clean the mounting surface on the engine block, removing any old gasket material or corrosion.\u003c\/li\u003e\n  \u003cli\u003ePosition the new O-rings on the new housing and mount it onto the block.\u003c\/li\u003e\n  \u003cli\u003eTighten the mounting bolts to the manufacturer's specified torque. Do not overtighten.\u003c\/li\u003e\n  \u003cli\u003eReconnect all cooling hoses securely to the new housing.\u003c\/li\u003e\n  \u003cli\u003eInstall the new drain plugs.\u003c\/li\u003e\n  \u003cli\u003eRefill the cooling system with the appropriate coolant.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery, start the engine, and carefully inspect for any leaks at idle and operating temperature.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm this housing fits my specific MerCruiser engine?\u003c\/summary\u003e\n  \u003cp\u003eFirst, check your OEM part number against the cross-reference list (863444T1, 863444A1, etc.). Second, find your engine model and year in the compatibility table. If both match, it will fit. If you're unsure, check your engine's service manual or contact us with your engine serial number.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the common signs of a failing water distribution housing?\u003c\/summary\u003e\n  \u003cp\u003eThe most common signs include visible coolant leaks (especially around the housing or its connection to the block), engine overheating alarms, and visible cracks or corrosion on the housing itself. A failure can lead to significant engine damage if not addressed.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the purpose of the manual drain plugs?\u003c\/summary\u003e\n  \u003cp\u003eThe manual drain plugs allow you to easily drain water from the engine block. This is a critical step for winterization in cold climates to prevent water from freezing and cracking the engine block or manifolds.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a complete kit? Do I need to buy gaskets separately?\u003c\/summary\u003e\n  \u003cp\u003eThis is a complete replacement kit. It includes the main housing, two drain plugs, and the two required O-rings for sealing against the engine block. No separate gaskets are typically required for this specific installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n  \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n  \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723967369531,"sku":"21DH002","price":87.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Drain_Distribution_Housing_Assembly_for_Mercury_MerCruiser_43_50_57_62L_and_350_377_383_MPI_-_JLM_MARINE-8287352.jpg?v=1763038679"},{"product_id":"thermostat-170-f-77-c-fits-mercruiser-4-3l-5-0l-5-7l-6-2l-engines-replaces-mercury-864493","title":"170°F \/ 77°C Thermostat with Rubber Sealing Ring for MerCruiser 4.3L, 5.0L, 5.7L \u0026 6.2L MPI Engines","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 {\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\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis replacement \u003cstrong\u003e170°F \/ 77°C thermostat\u003c\/strong\u003e is designed for MerCruiser stern-drive and outboard-drive applications with 4.3L, 5.0L, 5.7L and 6.2L MPI engines. The product includes one thermostat and one rubber sealing ring for a complete thermostat replacement.\u003c\/p\u003e\n\u003cp\u003eThe thermostat corresponds to MerCruiser\/Mercury OEM reference \u003cstrong\u003e864493\u003c\/strong\u003e. The included rubber sealing ring corresponds to \u003cstrong\u003e25-807134\u003c\/strong\u003e. Additional reference number: \u003cstrong\u003e18-43015\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e170°F \/ 77°C operating temperature rating.\u003c\/li\u003e\n\u003cli\u003eApplication range identified for MerCruiser 4.3L, 5.0L, 5.7L and 6.2L MPI engines.\u003c\/li\u003e\n\u003cli\u003eIncludes one thermostat and one rubber sealing ring.\u003c\/li\u003e\n\u003cli\u003eVerify the engine model, MPI configuration and original part references before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the following references to compare this replacement with the part being removed. The sealing-ring reference applies to the included ring, not to the thermostat itself.\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\u003eComponent\u003c\/th\u003e\n        \u003cth\u003eBrand or Reference Type\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eThermostat\u003c\/td\u003e\n        \u003ctd\u003eMerCruiser\/Mercury OEM reference\u003c\/td\u003e\n        \u003ctd\u003e864493\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eRubber sealing ring\u003c\/td\u003e\n        \u003ctd\u003eMerCruiser\/Mercury OEM reference\u003c\/td\u003e\n        \u003ctd\u003e25-807134\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eThermostat\u003c\/td\u003e\n        \u003ctd\u003eAdditional reference\u003c\/td\u003e\n        \u003ctd\u003e18-43015\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe company application data identifies this thermostat for the following MerCruiser MPI engine displacements. Exact year, serial-number range, drive configuration and cooling-system configuration are not specified in the available product record, so confirm those details against your engine identification plate and service information before installation.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine Compatibility\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eEngine Displacement\u003c\/th\u003e\n        \u003cth\u003eConfiguration\u003c\/th\u003e\n        \u003cth\u003eTemperature Rating\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\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e4.3L\u003c\/td\u003e\n        \u003ctd\u003eMPI\u003c\/td\u003e\n        \u003ctd\u003e170°F \/ 77°C\u003c\/td\u003e\n        \u003ctd\u003e864493\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.0L\u003c\/td\u003e\n        \u003ctd\u003eMPI\u003c\/td\u003e\n        \u003ctd\u003e170°F \/ 77°C\u003c\/td\u003e\n        \u003ctd\u003e864493\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e5.7L\u003c\/td\u003e\n        \u003ctd\u003eMPI\u003c\/td\u003e\n        \u003ctd\u003e170°F \/ 77°C\u003c\/td\u003e\n        \u003ctd\u003e864493\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMerCruiser\u003c\/td\u003e\n        \u003ctd\u003e6.2L\u003c\/td\u003e\n        \u003ctd\u003eMPI\u003c\/td\u003e\n        \u003ctd\u003e170°F \/ 77°C\u003c\/td\u003e\n        \u003ctd\u003e864493\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\u003eEngine thermostat with rubber sealing ring\u003c\/dd\u003e\n  \u003cdt\u003eTemperature Rating\u003c\/dt\u003e\n  \u003cdd\u003e170°F \/ 77°C\u003c\/dd\u003e\n  \u003cdt\u003eEngine Applications\u003c\/dt\u003e\n  \u003cdd\u003eMerCruiser 4.3L, 5.0L, 5.7L and 6.2L MPI engines\u003c\/dd\u003e\n  \u003cdt\u003eThermostat Reference\u003c\/dt\u003e\n  \u003cdd\u003e864493\u003c\/dd\u003e\n  \u003cdt\u003eSealing Ring Reference\u003c\/dt\u003e\n  \u003cdd\u003e25-807134\u003c\/dd\u003e\n  \u003cdt\u003eAdditional Reference\u003c\/dt\u003e\n  \u003cdd\u003e18-43015\u003c\/dd\u003e\n  \u003cdt\u003ePackage Contents\u003c\/dt\u003e\n  \u003cdd\u003eOne thermostat and one rubber sealing ring\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 170°F \/ 77°C thermostat, reference 864493\u003c\/li\u003e\n  \u003cli\u003e1 x rubber sealing ring, reference 25-807134\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eAllow the engine to cool completely before beginning work.\u003c\/li\u003e\n  \u003cli\u003eConfirm that the replacement thermostat, sealing ring and engine configuration match the original components.\u003c\/li\u003e\n  \u003cli\u003eRemove the thermostat housing according to the engine manufacturer's service procedure.\u003c\/li\u003e\n  \u003cli\u003eNote the orientation of the original thermostat before removal.\u003c\/li\u003e\n  \u003cli\u003eClean the housing and mating surfaces carefully without damaging them.\u003c\/li\u003e\n  \u003cli\u003eInstall the new thermostat and the included rubber sealing ring in the correct orientation.\u003c\/li\u003e\n  \u003cli\u003eReinstall the thermostat housing and tighten its fasteners to the manufacturer's specified torque.\u003c\/li\u003e\n  \u003cli\u003eRefill or restore the cooling system as required by the engine manufacturer's procedure.\u003c\/li\u003e\n  \u003cli\u003eRun the engine, inspect the housing for leaks and confirm that the temperature remains within the normal operating range.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat temperature does this thermostat open at?\u003c\/summary\u003e\n  \u003cp\u003eThis thermostat is rated at 170°F \/ 77°C.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhich engines are listed for this thermostat?\u003c\/summary\u003e\n  \u003cp\u003eThe available product information lists MerCruiser 4.3L, 5.0L, 5.7L and 6.2L MPI engines. Because year and serial-number conditions are not provided, confirm the exact engine application before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is included with the thermostat?\u003c\/summary\u003e\n  \u003cp\u003eThe package includes one thermostat and one rubber sealing ring. The thermostat reference is 864493, and the included ring reference is 25-807134.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM thermostat?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for a replacement thermostat. It is identified by the OEM reference 864493 for application and comparison purposes; it should not be assumed to be a factory-branded OEM component.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow can I confirm fitment for my engine?\u003c\/summary\u003e\n  \u003cp\u003eCheck the engine displacement, MPI configuration and the reference number on the original thermostat. Also compare the engine identification plate and service information, since exact model-year and serial-number ranges are not specified in the available product data.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a thermostat problem?\u003c\/summary\u003e\n  \u003cp\u003ePossible symptoms include overheating, unusually low operating temperature, slow warm-up or an unstable temperature reading. Diagnose the cooling system before replacing the thermostat.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eWork only on a fully cooled engine and follow the engine manufacturer's service procedure.\u003c\/li\u003e\n  \u003cli\u003eDo not rely on engine displacement alone; verify the MPI configuration and original reference before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not reuse a damaged or permanently deformed sealing ring.\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 — Parts selected for common marine engine service and replacement applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Product references and engine applications are provided to support part comparison.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePractical Service Support\u003c\/strong\u003e — Verify the exact engine configuration and original part before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723970777403,"sku":"23TH637","price":26.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/864493_1_ce1fa4e6-acf3-4141-bff0-be1a93602695.jpg?v=1763038814"}],"url":"https:\/\/seasierra.com\/collections\/mercury-mercruiser-4-3l-4-stroke-marine-engine-parts-1.oembed","provider":"SeaSierra","version":"1.0","type":"link"}