{"product_id":"mercruiser-thermostat-160f-76270t-3-7l","title":"MerCruiser Thermostat 160°F – 76270T (3.7L 470 \/ 485)","description":"\u003cp data-start=\"119\" data-end=\"435\"\u003eThe Mercury MerCruiser Thermostat 76270T is a genuine OEM 160°F thermostat designed primarily for early MerCruiser 3.7L (470\/485) inline 4-cylinder engines. This thermostat regulates engine temperature by controlling coolant flow, ensuring proper warm-up, stable operating temperature, and prevention of overheating.\u003c\/p\u003e\n\u003cp data-start=\"437\" data-end=\"758\"\u003eThis is a direct replacement for the original thermostat (76270), updated to the current “T” suffix version. It is specifically calibrated for raw water cooling systems commonly used on these engines, maintaining correct thermal balance for efficient combustion and engine longevity. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"760\" data-end=\"763\"\u003e\n\u003ch3 data-start=\"765\" data-end=\"781\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"782\" data-end=\"1139\"\u003e\n\u003cli data-start=\"782\" data-end=\"841\"\u003eGenuine Mercury MerCruiser \/ Quicksilver OEM thermostat\u003c\/li\u003e\n\u003cli data-start=\"842\" data-end=\"907\"\u003e\n\u003cstrong data-start=\"844\" data-end=\"872\"\u003e160°F temperature rating\u003c\/strong\u003e (standard for raw water cooling)\u003c\/li\u003e\n\u003cli data-start=\"908\" data-end=\"969\"\u003eDirect replacement for part number \u003cstrong data-start=\"945\" data-end=\"967\"\u003e76270 (superseded)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"970\" data-end=\"1027\"\u003eDesigned for consistent engine temperature regulation\u003c\/li\u003e\n\u003cli data-start=\"1028\" data-end=\"1088\"\u003eCorrosion-resistant construction for marine environments\u003c\/li\u003e\n\u003cli data-start=\"1089\" data-end=\"1139\"\u003eThermostat only (no gaskets or seals included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1141\" data-end=\"1144\"\u003e\n\u003ch3 data-start=\"1146\" data-end=\"1170\"\u003eEngine Compatibility\u003c\/h3\u003e\n\u003cp data-start=\"1171\" data-end=\"1189\"\u003ePrimarily used on:\u003c\/p\u003e\n\u003cul data-start=\"1191\" data-end=\"1334\"\u003e\n\u003cli data-start=\"1191\" data-end=\"1252\"\u003e\u003cstrong data-start=\"1193\" data-end=\"1250\"\u003eMerCruiser 3.7L (470 \/ 485) inline 4-cylinder engines\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-start=\"1253\" data-end=\"1334\"\u003eModel years approximately \u003cstrong data-start=\"1281\" data-end=\"1294\"\u003e1976–1982\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1336\" data-end=\"1357\"\u003eApplications include:\u003c\/p\u003e\n\u003cul data-start=\"1358\" data-end=\"1461\"\u003e\n\u003cli data-start=\"1358\" data-end=\"1405\"\u003eMerCruiser sterndrive (early Alpha systems)\u003c\/li\u003e\n\u003cli data-start=\"1406\" data-end=\"1461\"\u003eMerCruiser inboard variants using the 3.7L platform\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1463\" data-end=\"1568\"\u003e✔ Designed for \u003cstrong data-start=\"1478\" data-end=\"1506\"\u003eraw water cooled systems\u003c\/strong\u003e\u003cbr data-start=\"1506\" data-end=\"1509\"\u003e✔ Not interchangeable with later GM V6\/V8 thermostat kits\u003c\/p\u003e\n\u003chr data-start=\"1570\" data-end=\"1573\"\u003e\n\u003ch3 data-start=\"1575\" data-end=\"1607\"\u003eSerial Number Fitment Notice\u003c\/h3\u003e\n\u003cp data-start=\"1608\" data-end=\"1829\"\u003eFitment is highly specific on 3.7L engines. Always confirm using your engine serial number or original part number before ordering. These engines have unique cooling system layouts compared to GM-based MerCruiser engines.\u003c\/p\u003e\n\u003chr data-start=\"1831\" data-end=\"1834\"\u003e\n\u003ch3 data-start=\"1836\" data-end=\"1872\"\u003eWhen This Part Needs Replacement\u003c\/h3\u003e\n\u003cul data-start=\"1873\" data-end=\"2094\"\u003e\n\u003cli data-start=\"1873\" data-end=\"1915\"\u003eEngine running too cold or overheating\u003c\/li\u003e\n\u003cli data-start=\"1916\" data-end=\"1960\"\u003eSlow warm-up or inconsistent temperature\u003c\/li\u003e\n\u003cli data-start=\"1961\" data-end=\"1996\"\u003eThermostat stuck open or closed\u003c\/li\u003e\n\u003cli data-start=\"1997\" data-end=\"2045\"\u003eCorrosion or scaling found during inspection\u003c\/li\u003e\n\u003cli data-start=\"2046\" data-end=\"2094\"\u003eCooling system service on older 3.7L engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2096\" data-end=\"2099\"\u003e\n\u003ch3 data-start=\"2101\" data-end=\"2123\"\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul data-start=\"2124\" data-end=\"2397\"\u003e\n\u003cli data-start=\"2124\" data-end=\"2189\"\u003eReplace gasket and seal (sold separately) during installation\u003c\/li\u003e\n\u003cli data-start=\"2190\" data-end=\"2238\"\u003eInstall with spring side facing engine block\u003c\/li\u003e\n\u003cli data-start=\"2239\" data-end=\"2287\"\u003eClean housing thoroughly before reinstalling\u003c\/li\u003e\n\u003cli data-start=\"2288\" data-end=\"2353\"\u003eInspect water passages for corrosion (common on 3.7L engines)\u003c\/li\u003e\n\u003cli data-start=\"2354\" data-end=\"2397\"\u003eVerify proper circulation after startup\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2399\" data-end=\"2402\"\u003e\n\u003ch3 data-start=\"2404\" data-end=\"2461\"\u003eAlternate \/ Superseded \/ Cross-Reference Part Numbers\u003c\/h3\u003e\n\u003cul data-start=\"2462\" data-end=\"2679\"\u003e\n\u003cli data-start=\"2462\" data-end=\"2499\"\u003eMercury \/ Quicksilver: \u003cstrong data-start=\"2487\" data-end=\"2497\"\u003e76270T\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2500\" data-end=\"2563\"\u003eSupersedes: \u003cstrong data-start=\"2514\" data-end=\"2523\"\u003e76270\u003c\/strong\u003e \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2564\" data-end=\"2604\"\u003eSierra: \u003cstrong data-start=\"2574\" data-end=\"2602\"\u003e18-3552 (kit equivalent)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2605\" data-end=\"2679\"\u003eAftermarket references may include: \u003cstrong data-start=\"2643\" data-end=\"2677\"\u003e27-896561, 99155A1 equivalents\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2681\" data-end=\"2684\"\u003e\n\u003ch3 data-start=\"2686\" data-end=\"2708\"\u003eParts Desk Insight\u003c\/h3\u003e\n\u003cp data-start=\"2709\" data-end=\"3100\"\u003eThis thermostat is specific to the \u003cstrong data-start=\"2744\" data-end=\"2775\"\u003eMerCruiser 470\/485 platform\u003c\/strong\u003e, which uses a unique cooling system compared to standard GM-based engines. These engines are known for corrosion issues in cooling passages — if you’re replacing the thermostat, it’s a good time to inspect the entire system. Also note this is \u003cstrong data-start=\"3019\" data-end=\"3077\"\u003enot interchangeable with 807252-series thermostat kits\u003c\/strong\u003e used on V6\/V8 engines.\u003c\/p\u003e\n\u003chr data-start=\"3102\" data-end=\"3105\"\u003e\n\u003ch3 data-start=\"3107\" data-end=\"3119\"\u003eShipping\u003c\/h3\u003e\n\u003cp data-start=\"3120\" data-end=\"3185\"\u003eShipping: Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563871043620,"sku":"76270T","price":73.42,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/e0f57c2e-56fc-4757-bd8e-3e55f54cba36.png?v=1774393520","url":"https:\/\/marisolmarine.com\/products\/mercruiser-thermostat-160f-76270t-3-7l","provider":"Marisol Marine Company","version":"1.0","type":"link"}