{"product_id":"thermostat-kit-fits-mercury-mariner-75-150-hp-4-stroke-efi-replaces-892864t06-892864a06","title":"Thermostat Kit – Fits Mercury\/Mariner 75-150 HP 4-Stroke EFI (Replaces 892864T06, 892864A06)","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 complete \u003cstrong\u003eThermostat Kit – Fits Mercury\/Mariner 75-150 HP 4-Stroke EFI Outboards\u003c\/strong\u003e is a direct-fit aftermarket replacement for a range of 4-strokeEFI engines from 75 HP to 150 HP (2001–2014). It is a critical component for regulating engine temperature, ensuring optimal performance, longevity, and fuel efficiency. This assembly is designed to fit models within specific serial number ranges, so verification is essential.\u003c\/p\u003e\n  \u003cp\u003eIt provides a direct interchange for Mercury part numbers 892864T06 and 892864A06, which are superseded by 8M0090819. It also cross-references with aftermarket equivalents like Sierra 18-3635-K and JLM Marine AM892864T06.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eEngineered as a direct-fit OEM replacement for a hassle-free installation.\u003c\/li\u003e\n    \u003cli\u003eComes as a complete kit including the housing, thermostat, O-ring, and clamp.\u003c\/li\u003e\n    \u003cli\u003eMaintains a factory-specified 48.8°C\/50°C (120°F) operating temperature.\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 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          \u003cth\u003eSuperseded By\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\u003e8M0090819\u003c\/td\u003e\n          \u003ctd\u003eOEM Part\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e892864A06\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003eAlternative OEM Part\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eSierra\u003c\/td\u003e\n          \u003ctd\u003e18-3635-K\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eJLM Marine\u003c\/td\u003e\n          \u003ctd\u003eAM892864T06\u003c\/td\u003e\n          \u003ctd\u003e\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\u003c\/section\u003e\n\u003csection\u003e\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\/Mariner outboards, it is critical to verify your engine's serial number against the specified ranges to ensure proper 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\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\u003c\/td\u003e\n          \u003ctd\u003eEFI\u003c\/td\u003e\n          \u003ctd\u003e75\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2001–2009\u003c\/td\u003e\n          \u003ctd\u003e892864T06\u003c\/td\u003e\n          \u003ctd\u003eSerial range: 1B366823-2B094995\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003eEFI\u003c\/td\u003e\n          \u003ctd\u003e80\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2001–2009\u003c\/td\u003e\n          \u003ctd\u003e892864T06\u003c\/td\u003e\n          \u003ctd\u003eSerial range: 0P459572-2B094995, 1B366823-2B094995\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003eEFI\u003c\/td\u003e\n          \u003ctd\u003e90\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2001–2009\u003c\/td\u003e\n          \u003ctd\u003e892864T06\u003c\/td\u003e\n          \u003ctd\u003eSerial range: 1B366823-2B094995\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003eEFI\u003c\/td\u003e\n          \u003ctd\u003e100\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2001–2009\u003c\/td\u003e\n          \u003ctd\u003e892864T06\u003c\/td\u003e\n          \u003ctd\u003eSerial range: 0P459572-2B094995, 1B366823-2B094995\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003eEFI\u003c\/td\u003e\n          \u003ctd\u003e115\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2001–2009\u003c\/td\u003e\n          \u003ctd\u003e892864T06\u003c\/td\u003e\n          \u003ctd\u003eSerial range: 1B366823-2B094995\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003eEFI\u003c\/td\u003e\n          \u003ctd\u003e150\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2001–2014\u003c\/td\u003e\n          \u003ctd\u003e892864T06\u003c\/td\u003e\n          \u003ctd\u003eSerial range: 1B905505 \u0026amp; Up\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\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003eThermostat Kit with Housing Assembly\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eDirect-fit OEM replacement\u003c\/dd\u003e\n    \u003cdt\u003eFuel Type\u003c\/dt\u003e\n    \u003cdd\u003eGasoline\u003c\/dd\u003e\n    \u003cdt\u003eHousing Material\u003c\/dt\u003e\n    \u003cdd\u003eMarine-grade metal alloy\u003c\/dd\u003e\n    \u003cdt\u003eDimensions\u003c\/dt\u003e\n    \u003cdd\u003eApproximately 100 mm × 90 mm × 150 mm\u003c\/dd\u003e\n    \u003cdt\u003eOperating Temperature\u003c\/dt\u003e\n    \u003cdd\u003e48.8°C\/50°C (120°F) rated temperature\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n    \u003cdd\u003eComplete assembly with housing, thermostat, O-ring and clamp\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 with Housing (892864T06\/8M0090819)\u003c\/li\u003e\n    \u003cli\u003e1 x O-ring Seal (8M005958)\u003c\/li\u003e\n    \u003cli\u003e1 x Clamp (888988008)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the negative battery cable before beginning work.\u003c\/li\u003e\n    \u003cli\u003eAllow the engine to cool completely and drain the engine's cooling system.\u003c\/li\u003e\n    \u003cli\u003eLocate the thermostat housing on the engine block or cylinder head.\u003c\/li\u003e\n    \u003cli\u003eDisconnect any hoses attached to the housing and remove the mounting bolts.\u003c\/li\u003e\n    \u003cli\u003eCarefully remove the old housing assembly. Note the orientation of the old thermostat.\u003c\/li\u003e\n    \u003cli\u003eThoroughly clean the gasket mating surfaces on the engine to remove any old sealant or corrosion.\u003c\/li\u003e\n    \u003cli\u003eInstall the new thermostat into the housing, ensuring it is oriented correctly.\u003c\/li\u003e\n    \u003cli\u003ePlace the new O-ring or gasket onto the housing and position the assembly on the engine.\u003c\/li\u003e\n    \u003cli\u003eInstall and tighten the mounting bolts to the manufacturer's specified torque. Do not overtighten.\u003c\/li\u003e\n    \u003cli\u003eReconnect all hoses and secure with clamps.\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 check for any leaks. Monitor the temperature gauge to ensure it reaches and maintains the correct 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\u003eCommon signs of a faulty thermostat include engine overheating, the engine failing to reach normal operating temperature (running too cold), erratic temperature gauge readings, and coolant leaks from the housing area.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this fit my engine if it's not listed?\u003c\/summary\u003e\n    \u003cp\u003eIf your engine's model, year, and serial number are not listed in the compatibility chart, this part is likely not correct. Using the wrong thermostat can cause engine damage. Always verify fitment before purchasing.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the difference between a 120°F and a 143°F thermostat?\u003c\/summary\u003e\n    \u003cp\u003eThis is a 48.8°C\/50°C (120°F) rated thermostat. Different engines require different temperature ratings for optimal performance, especially depending on whether they are used in freshwater or saltwater. Always use the temperature rating specified for your engine model.\u003c\/p\u003eaop\u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I reuse my old O-ring or housing?\u003c\/summary\u003e\n    \u003cp\u003eNo. This kit includes a new housing, thermostat, O-ring, and clamp. It is critical to replace all these components together to ensure a proper seal and prevent leaks or future failures.\u003c\/p\u003e\n  \u003c\/details\u003e\n    \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace my thermostat?\u003c\/summary\u003e\n    \u003cp\u003eThermostats are a routine maintenance item. It is best practice to inspect them annually and consider replacement every 3-5 years or in accordance with your engine's service manual, particularly for boats operated in saltwater.\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\u003ep\u0026gt;Covered 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.\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\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\u003c\/section\u003e\n\u003csection\u003e\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":50723982999867,"sku":"21TH010","price":32.49,"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","url":"https:\/\/seasierra.com\/products\/thermostat-kit-fits-mercury-mariner-75-150-hp-4-stroke-efi-replaces-892864t06-892864a06","provider":"SeaSierra","version":"1.0","type":"link"}