{"product_id":"mercruiser-thermostat-seal-8071341","title":"MerCruiser Thermostat Seal – 8071341","description":"\u003cp data-start=\"83\" data-end=\"427\"\u003ehe Mercury MerCruiser Thermostat Seal 8071341 is a genuine OEM rubber sealing ring designed to properly seal the thermostat within the thermostat housing on GM-based MerCruiser engines. This seal ensures correct coolant flow direction and prevents internal bypass leakage, which is critical for maintaining proper engine operating temperature.\u003c\/p\u003e\n\u003cp data-start=\"429\" data-end=\"705\"\u003eManufactured from marine-grade rubber, this seal is built to withstand continuous exposure to heat, coolant, and raw water environments without degrading or losing sealing integrity. It is a direct replacement component typically used during thermostat service or replacement.\u003c\/p\u003e\n\u003chr data-start=\"707\" data-end=\"710\"\u003e\n\u003ch3 data-start=\"712\" data-end=\"728\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"729\" data-end=\"1035\"\u003e\n\u003cli data-start=\"729\" data-end=\"782\"\u003eGenuine Mercury MerCruiser \/ Quicksilver OEM seal\u003c\/li\u003e\n\u003cli data-start=\"783\" data-end=\"829\"\u003eDesigned for thermostat-to-housing sealing\u003c\/li\u003e\n\u003cli data-start=\"830\" data-end=\"878\"\u003ePrevents coolant bypass and internal leakage\u003c\/li\u003e\n\u003cli data-start=\"879\" data-end=\"930\"\u003eMarine-grade rubber construction for durability\u003c\/li\u003e\n\u003cli data-start=\"931\" data-end=\"976\"\u003eDirect OEM fit — no modification required\u003c\/li\u003e\n\u003cli data-start=\"977\" data-end=\"1035\"\u003eCritical component for proper cooling system operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1037\" data-end=\"1040\"\u003e\n\u003ch3 data-start=\"1042\" data-end=\"1066\"\u003eEngine Compatibility\u003c\/h3\u003e\n\u003cp data-start=\"1067\" data-end=\"1116\"\u003eFits a wide range of GM-based MerCruiser engines:\u003c\/p\u003e\n\u003cul data-start=\"1118\" data-end=\"1201\"\u003e\n\u003cli data-start=\"1118\" data-end=\"1129\"\u003e4.3L V6\u003c\/li\u003e\n\u003cli data-start=\"1130\" data-end=\"1147\"\u003e5.0L V8 (305)\u003c\/li\u003e\n\u003cli data-start=\"1148\" data-end=\"1165\"\u003e5.7L V8 (350)\u003c\/li\u003e\n\u003cli data-start=\"1166\" data-end=\"1183\"\u003e7.4L V8 (454)\u003c\/li\u003e\n\u003cli data-start=\"1184\" data-end=\"1201\"\u003e8.2L V8 (502)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1203\" data-end=\"1224\"\u003eApplications include:\u003c\/p\u003e\n\u003cul data-start=\"1225\" data-end=\"1369\"\u003e\n\u003cli data-start=\"1225\" data-end=\"1267\"\u003eMerCruiser Alpha and Bravo sterndrives\u003c\/li\u003e\n\u003cli data-start=\"1268\" data-end=\"1298\"\u003eMerCruiser inboard engines\u003c\/li\u003e\n\u003cli data-start=\"1299\" data-end=\"1369\"\u003eUsed in both raw water and some closed cooling thermostat housings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1371\" data-end=\"1489\"\u003e✔ Commonly used with thermostat kits such as 807252T5 and 807252T4\u003cbr data-start=\"1437\" data-end=\"1440\"\u003e✔ Installed between thermostat and housing bore\u003c\/p\u003e\n\u003chr data-start=\"1491\" data-end=\"1494\"\u003e\n\u003ch3 data-start=\"1496\" data-end=\"1528\"\u003eSerial Number Fitment Notice\u003c\/h3\u003e\n\u003cp data-start=\"1529\" data-end=\"1711\"\u003eFitment can vary depending on thermostat housing design and engine serial number. Always confirm using your engine serial number or visually match your existing seal before ordering.\u003c\/p\u003e\n\u003chr data-start=\"1713\" data-end=\"1716\"\u003e\n\u003ch3 data-start=\"1718\" data-end=\"1754\"\u003eWhen This Part Needs Replacement\u003c\/h3\u003e\n\u003cul data-start=\"1755\" data-end=\"1992\"\u003e\n\u003cli data-start=\"1755\" data-end=\"1799\"\u003eDuring thermostat replacement or service\u003c\/li\u003e\n\u003cli data-start=\"1800\" data-end=\"1839\"\u003eCoolant leaks at thermostat housing\u003c\/li\u003e\n\u003cli data-start=\"1840\" data-end=\"1885\"\u003eEngine not maintaining proper temperature\u003c\/li\u003e\n\u003cli data-start=\"1886\" data-end=\"1933\"\u003eSeal appears flattened, cracked, or brittle\u003c\/li\u003e\n\u003cli data-start=\"1934\" data-end=\"1992\"\u003ePreventative maintenance during cooling system service\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1994\" data-end=\"1997\"\u003e\n\u003ch3 data-start=\"1999\" data-end=\"2021\"\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul data-start=\"2022\" data-end=\"2310\"\u003e\n\u003cli data-start=\"2022\" data-end=\"2087\"\u003eLightly lubricate seal with clean coolant before installation\u003c\/li\u003e\n\u003cli data-start=\"2088\" data-end=\"2138\"\u003eEnsure seal is seated evenly in housing groove\u003c\/li\u003e\n\u003cli data-start=\"2139\" data-end=\"2195\"\u003eDo not reuse old seals — always replace when removed\u003c\/li\u003e\n\u003cli data-start=\"2196\" data-end=\"2251\"\u003eInspect thermostat housing for corrosion or pitting\u003c\/li\u003e\n\u003cli data-start=\"2252\" data-end=\"2310\"\u003eVerify proper thermostat orientation before reassembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2312\" data-end=\"2315\"\u003e\n\u003ch3 data-start=\"2317\" data-end=\"2374\"\u003eAlternate \/ Superseded \/ Cross-Reference Part Numbers\u003c\/h3\u003e\n\u003cul data-start=\"2375\" data-end=\"2509\"\u003e\n\u003cli data-start=\"2375\" data-end=\"2409\"\u003eMercury \/ Quicksilver: 8071341\u003c\/li\u003e\n\u003cli data-start=\"2410\" data-end=\"2429\"\u003eSierra: 18-0396\u003c\/li\u003e\n\u003cli data-start=\"2430\" data-end=\"2444\"\u003eGLM: 13110\u003c\/li\u003e\n\u003cli data-start=\"2445\" data-end=\"2509\"\u003eOften included in thermostat kits (e.g., 807252T5, 807252T4)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2511\" data-end=\"2514\"\u003e\n\u003ch3 data-start=\"2516\" data-end=\"2538\"\u003eParts Desk Insight\u003c\/h3\u003e\n\u003cp data-start=\"2539\" data-end=\"2856\"\u003eThis is a small but critical component. A worn or missing thermostat seal will cause improper coolant flow, often leading to engines running too cold or overheating inconsistently. It’s standard practice to replace this seal anytime the thermostat is serviced — reusing the old one is a common cause of repeat issues.\u003c\/p\u003e\n\u003chr data-start=\"2858\" data-end=\"2861\"\u003e\n\u003ch3 data-start=\"2863\" data-end=\"2875\"\u003eShipping\u003c\/h3\u003e\n\u003cp data-start=\"2876\" data-end=\"2941\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eShipping: Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563878875172,"sku":"8071341","price":14.84,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/mercruiser-thermostat-gasket.jpg?v=1774393121","url":"https:\/\/marisolmarine.com\/products\/mercruiser-thermostat-seal-8071341","provider":"Marisol Marine Company","version":"1.0","type":"link"}