{"product_id":"mercruiser-thermostat-cover-housing-8m0061068","title":"MerCruiser Thermostat Cover Housing – 8M0061068 (454 \/ 502 Big Block)","description":"\u003cp data-end=\"362\" data-start=\"202\"\u003eThe \u003cstrong data-end=\"266\" data-start=\"206\"\u003eMercury \/ Quicksilver 8M0061068 Thermostat Cover Housing\u003c\/strong\u003e is a genuine OEM \u003cstrong data-end=\"318\" data-start=\"284\"\u003eupper thermostat housing cover\u003c\/strong\u003e used on MerCruiser GM-based marine engines.\u003c\/p\u003e\n\u003cp data-end=\"653\" data-start=\"364\"\u003eThis component sits on top of the thermostat housing and seals the thermostat assembly, directing coolant flow into and out of the engine. It is a \u003cstrong data-end=\"547\" data-start=\"511\"\u003estructural and sealing component\u003c\/strong\u003e, not a thermostat itself, and is critical for maintaining proper coolant circulation and system pressure.\u003c\/p\u003e\n\u003cp data-end=\"900\" data-start=\"655\"\u003eThe housing features an \u003cstrong data-end=\"713\" data-start=\"679\"\u003eoffset (diagonal) bolt pattern\u003c\/strong\u003e and is designed to work with big-block MerCruiser cooling systems. It replaces earlier designs while maintaining OEM fit and flow characteristics. \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-end=\"905\" data-start=\"902\"\u003e\n\u003ch2 data-end=\"926\" data-start=\"907\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"926\" data-start=\"910\"\u003eKey Features\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-end=\"1184\" data-start=\"927\"\u003e\n\u003cli data-end=\"969\" data-start=\"927\"\u003eGenuine Mercury \/ Quicksilver OEM part\u003c\/li\u003e\n\u003cli data-end=\"1014\" data-start=\"970\"\u003eThermostat housing \u003cstrong data-end=\"1012\" data-start=\"991\"\u003eupper cover \/ cap\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1060\" data-start=\"1015\"\u003eMaintains proper coolant flow and sealing\u003c\/li\u003e\n\u003cli data-end=\"1113\" data-start=\"1061\"\u003eDesigned for high-flow big block cooling systems\u003c\/li\u003e\n\u003cli data-end=\"1157\" data-start=\"1114\"\u003eCorrosion-resistant marine construction\u003c\/li\u003e\n\u003cli data-end=\"1184\" data-start=\"1158\"\u003eDirect OEM replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1189\" data-start=\"1186\"\u003e\n\u003ch2 data-end=\"1218\" data-start=\"1191\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"1218\" data-start=\"1194\"\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 data-end=\"1255\" data-start=\"1220\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"1255\" data-start=\"1224\"\u003eMerCruiser GM-Based Engines\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-end=\"1273\" data-start=\"1256\"\u003eCommonly used on:\u003c\/p\u003e\n\u003cul data-end=\"1364\" data-start=\"1274\"\u003e\n\u003cli data-end=\"1299\" data-start=\"1274\"\u003e\u003cstrong data-end=\"1297\" data-start=\"1276\"\u003e454 CID (7.4L) V8\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-end=\"1325\" data-start=\"1300\"\u003e\u003cstrong data-end=\"1323\" data-start=\"1302\"\u003e502 CID (8.2L) V8\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-end=\"1364\" data-start=\"1326\"\u003eHigh-performance big block engines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"1394\" data-start=\"1366\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"1394\" data-start=\"1370\"\u003eTypical Applications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"1459\" data-start=\"1395\"\u003e\n\u003cli data-end=\"1415\" data-start=\"1395\"\u003eMCM (sterndrive)\u003c\/li\u003e\n\u003cli data-end=\"1433\" data-start=\"1416\"\u003eMIE (inboard)\u003c\/li\u003e\n\u003cli data-end=\"1459\" data-start=\"1434\"\u003eTRS and Bravo systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1489\" data-start=\"1461\"\u003e➡️ Found on engines such as:\u003c\/p\u003e\n\u003cul data-end=\"1652\" data-start=\"1490\"\u003e\n\u003cli data-end=\"1540\" data-start=\"1490\"\u003e330 \/ 340 \/ 370 \/ 400 \/ 420 \/ 425 \/ 440 models\u003c\/li\u003e\n\u003cli data-end=\"1558\" data-start=\"1541\"\u003e454 MAG Alpha\u003c\/li\u003e\n\u003cli data-end=\"1652\" data-start=\"1559\"\u003e7.4L and 8.2L big block platforms (1980s–1990s era) \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"1657\" data-start=\"1654\"\u003e\n\u003ch2 data-end=\"1696\" data-start=\"1659\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"1694\" data-start=\"1662\"\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-end=\"1716\" data-start=\"1697\"\u003eFitment depends on:\u003c\/p\u003e\n\u003cul data-end=\"1810\" data-start=\"1717\"\u003e\n\u003cli data-end=\"1752\" data-start=\"1717\"\u003eEngine displacement (454 \/ 502)\u003c\/li\u003e\n\u003cli data-end=\"1785\" data-start=\"1753\"\u003eCooling system configuration\u003c\/li\u003e\n\u003cli data-end=\"1810\" data-start=\"1786\"\u003eHousing bolt pattern\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"1896\" data-start=\"1812\"\u003e⚠️ Always confirm compatibility using your \u003cstrong data-end=\"1879\" data-start=\"1855\"\u003eengine serial number\u003c\/strong\u003e before ordering.\u003c\/p\u003e\n\u003chr data-end=\"1901\" data-start=\"1898\"\u003e\n\u003ch2 data-end=\"1924\" data-start=\"1903\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"1924\" data-start=\"1906\"\u003eSpecifications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-end=\"2187\" data-start=\"1925\"\u003e\n\u003cli data-end=\"1955\" data-start=\"1925\"\u003ePart Number: \u003cstrong data-end=\"1953\" data-start=\"1940\"\u003e8M0061068\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1990\" data-start=\"1956\"\u003eType: Thermostat housing cover\u003c\/li\u003e\n\u003cli data-end=\"2054\" data-start=\"1991\"\u003eFunction: Seals thermostat housing and directs coolant flow\u003c\/li\u003e\n\u003cli data-end=\"2090\" data-start=\"2055\"\u003eBolt Pattern: Offset \/ diagonal\u003c\/li\u003e\n\u003cli data-end=\"2128\" data-start=\"2091\"\u003eMaterial: Marine-grade cast metal\u003c\/li\u003e\n\u003cli data-end=\"2187\" data-start=\"2129\"\u003eWeight: ~1.5 lbs \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2192\" data-start=\"2189\"\u003e\n\u003ch2 data-end=\"2216\" data-start=\"2194\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2216\" data-start=\"2197\"\u003eWhat’s Included\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-end=\"2294\" data-start=\"2217\"\u003e\n\u003cli data-end=\"2294\" data-start=\"2217\"\u003eThermostat housing cover only\u003cbr data-end=\"2251\" data-start=\"2248\"\u003e\u003cem data-end=\"2292\" data-start=\"2251\"\u003e(Gasket and thermostat sold separately)\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2299\" data-start=\"2296\"\u003e\n\u003ch2 data-end=\"2340\" data-start=\"2301\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2340\" data-start=\"2304\"\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-end=\"2527\" data-start=\"2341\"\u003e\n\u003cli data-end=\"2379\" data-start=\"2341\"\u003eCoolant leak at thermostat housing\u003c\/li\u003e\n\u003cli data-end=\"2423\" data-start=\"2380\"\u003eCorrosion or pitting on sealing surface\u003c\/li\u003e\n\u003cli data-end=\"2453\" data-start=\"2424\"\u003eWarped or cracked housing\u003c\/li\u003e\n\u003cli data-end=\"2488\" data-start=\"2454\"\u003eStripped or damaged bolt holes\u003c\/li\u003e\n\u003cli data-end=\"2527\" data-start=\"2489\"\u003eDuring full cooling system rebuild\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2532\" data-start=\"2529\"\u003e\n\u003ch2 data-end=\"2559\" data-start=\"2534\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2559\" data-start=\"2537\"\u003eInstallation Notes\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul data-end=\"2774\" data-start=\"2560\"\u003e\n\u003cli data-end=\"2601\" data-start=\"2560\"\u003eAlways replace gasket when installing\u003c\/li\u003e\n\u003cli data-end=\"2638\" data-start=\"2602\"\u003eClean mating surfaces completely\u003c\/li\u003e\n\u003cli data-end=\"2686\" data-start=\"2639\"\u003eCheck thermostat housing base for corrosion\u003c\/li\u003e\n\u003cli data-end=\"2727\" data-start=\"2687\"\u003eTorque bolts evenly to avoid warping\u003c\/li\u003e\n\u003cli data-end=\"2774\" data-start=\"2728\"\u003ePressure test cooling system after install\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2779\" data-start=\"2776\"\u003e\n\u003ch2 data-end=\"2823\" data-start=\"2781\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2823\" data-start=\"2784\"\u003eAlternate \/ Superseded Part Numbers\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 data-end=\"2853\" data-start=\"2825\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2853\" data-start=\"2829\"\u003eOEM Cross References\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2968\" data-start=\"2854\"\u003e\n\u003cli data-end=\"2894\" data-start=\"2854\"\u003eMercury \/ Quicksilver: \u003cstrong data-end=\"2892\" data-start=\"2879\"\u003e8M0061068\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2968\" data-start=\"2895\"\u003eSupersedes: \u003cstrong data-end=\"2928\" data-start=\"2909\"\u003e47442A1 \/ 47442\u003c\/strong\u003e \u003cspan data-state=\"closed\" class=\"\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-end=\"2973\" data-start=\"2970\"\u003e\n\u003ch2 data-end=\"2992\" data-start=\"2975\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-end=\"2990\" data-start=\"2978\"\u003eShipping\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-end=\"3060\" data-start=\"2993\"\u003eShipping: Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e\n\u003chr data-end=\"3065\" data-start=\"3062\"\u003e\n\u003ch3 data-end=\"3094\" data-start=\"3067\"\u003e💡 Parts Desk Insight\u003c\/h3\u003e\n\u003cp data-end=\"3236\" data-start=\"3095\"\u003eIf you’re replacing this cover, \u003cstrong data-end=\"3160\" data-start=\"3127\"\u003einspect the lower housing too\u003c\/strong\u003e—on big blocks, corrosion usually affects both surfaces, not just the cap 👍\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563911675940,"sku":"8M0061068","price":162.84,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/0a89c3cf-d8f4-4eb9-960e-34af4843514a.png?v=1773441300","url":"https:\/\/marisolmarine.com\/products\/mercruiser-thermostat-cover-housing-8m0061068","provider":"Marisol Marine Company","version":"1.0","type":"link"}