{"product_id":"gasket-27-806871q","title":"Mercury – Quicksilver Thermostat O-Ring Gasket | For MerCruiser 4.5L \u0026 6.2L Engines | 806871Q","description":"\u003cp data-start=\"0\" data-end=\"99\"\u003e\u003cstrong data-start=\"0\" data-end=\"97\"\u003eMercury – Quicksilver Thermostat O-Ring Gasket | For MerCruiser 4.5L \u0026amp; 6.2L Engines | 806871Q\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr data-start=\"101\" data-end=\"104\"\u003e\n\u003ch3 data-start=\"106\" data-end=\"124\"\u003e\u003cstrong data-start=\"110\" data-end=\"122\"\u003eOverview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"125\" data-end=\"636\"\u003eA proper seal around your thermostat means steady cooling and reliable performance. The \u003cstrong data-start=\"213\" data-end=\"276\"\u003eMercury Marine 806871Q Quicksilver Thermostat O-Ring Gasket\u003c\/strong\u003e is designed for \u003cstrong data-start=\"293\" data-end=\"348\"\u003eV6 and V8 MerCruiser sterndrive and inboard engines\u003c\/strong\u003e with the newer 1-piece thermostat housing. It’s also used on \u003cstrong data-start=\"410\" data-end=\"471\"\u003e4.5L and 6.2L MPI engines (serial number 2A456613 and up)\u003c\/strong\u003e. Made from high-quality, heat-resistant rubber, this O-ring creates a tight seal that holds up to vibration, pressure, and temperature swings season after season.\u003c\/p\u003e\n\u003chr data-start=\"638\" data-end=\"641\"\u003e\n\u003ch3 data-start=\"643\" data-end=\"665\"\u003e\u003cstrong data-start=\"647\" data-end=\"663\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"668\" data-end=\"773\"\u003e\n\u003cstrong data-start=\"668\" data-end=\"680\"\u003ePurpose:\u003c\/strong\u003e Seals the thermostat housing to prevent leaks and maintain proper cooling system pressure.\u003c\/li\u003e\n\u003cli data-start=\"776\" data-end=\"866\"\u003e\n\u003cstrong data-start=\"776\" data-end=\"784\"\u003eFit:\u003c\/strong\u003e Designed for \u003cstrong data-start=\"798\" data-end=\"829\"\u003e1-piece thermostat housings\u003c\/strong\u003e found on newer MerCruiser engines.\u003c\/li\u003e\n\u003cli data-start=\"869\" data-end=\"959\"\u003e\n\u003cstrong data-start=\"869\" data-end=\"882\"\u003eMaterial:\u003c\/strong\u003e Made from \u003cstrong data-start=\"893\" data-end=\"942\"\u003edurable, heat- and vibration-resistant rubber\u003c\/strong\u003e for long life.\u003c\/li\u003e\n\u003cli data-start=\"962\" data-end=\"1040\"\u003e\n\u003cstrong data-start=\"962\" data-end=\"980\"\u003eCompatibility:\u003c\/strong\u003e Perfect fit for \u003cstrong data-start=\"997\" data-end=\"1037\"\u003e4.5L and 6.2L MPI MerCruiser engines\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-start=\"1043\" data-end=\"1135\"\u003e\n\u003cstrong data-start=\"1043\" data-end=\"1059\"\u003eOEM Quality:\u003c\/strong\u003e Meets Mercury Marine’s original equipment standards for fit and function.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1137\" data-end=\"1140\"\u003e\n\u003ch3 data-start=\"1142\" data-end=\"1179\"\u003e\u003cstrong data-start=\"1146\" data-end=\"1177\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli data-start=\"1182\" data-end=\"1262\"\u003e\n\u003cstrong data-start=\"1182\" data-end=\"1237\"\u003eV6 and V8 MerCruiser sterndrive and inboard engines\u003c\/strong\u003e made by General Motors\u003c\/li\u003e\n\u003cli data-start=\"1265\" data-end=\"1313\"\u003e\n\u003cstrong data-start=\"1265\" data-end=\"1288\"\u003eMerCruiser 4.5L MPI\u003c\/strong\u003e (Multi-Port Injection)\u003c\/li\u003e\n\u003cli data-start=\"1316\" data-end=\"1376\"\u003e\n\u003cstrong data-start=\"1316\" data-end=\"1339\"\u003eMerCruiser 6.2L MPI\u003c\/strong\u003e (serial number 2A456613 and newer)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1378\" data-end=\"1381\"\u003e\n\u003ch3 data-start=\"1383\" data-end=\"1426\"\u003e\u003cstrong data-start=\"1387\" data-end=\"1424\"\u003ePerformance \u0026amp; Real-World Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1427\" data-end=\"1694\"\u003eThe \u003cstrong data-start=\"1431\" data-end=\"1456\"\u003e806871Q O-ring gasket\u003c\/strong\u003e may be a small part, but it plays a big role in keeping your engine running cool. A worn or flattened seal can lead to coolant leaks, air pockets, or temperature fluctuations — all of which can cause overheating or reduced performance.\u003c\/p\u003e\n\u003cp data-start=\"1696\" data-end=\"1996\"\u003eThis gasket’s flexible rubber compound maintains its shape and seal under heat and vibration, preventing coolant loss and keeping your thermostat operating properly. Once installed, it ensures a tight, leak-free connection so your engine maintains consistent temperature control in every condition.\u003c\/p\u003e\n\u003chr data-start=\"1998\" data-end=\"2001\"\u003e\n\u003ch3 data-start=\"2003\" data-end=\"2035\"\u003e\u003cstrong data-start=\"2007\" data-end=\"2033\"\u003eWhy Choose Mercury OEM\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2036\" data-end=\"2308\"\u003eThe \u003cstrong data-start=\"2040\" data-end=\"2063\"\u003eQuicksilver 806871Q\u003c\/strong\u003e is a \u003cstrong data-start=\"2069\" data-end=\"2102\"\u003egenuine Mercury Marine gasket\u003c\/strong\u003e, designed and tested for the engines it serves. Aftermarket gaskets may look similar, but their materials can break down faster or fail to seal evenly, especially under marine temperatures and vibration.\u003c\/p\u003e\n\u003cp data-start=\"2310\" data-end=\"2519\"\u003eMercury OEM gaskets are built to perform under pressure — literally. They deliver a perfect fit, long service life, and the kind of reliability that keeps your cooling system maintenance-free and worry-free.\u003c\/p\u003e\n\u003chr data-start=\"2521\" data-end=\"2524\"\u003e\n\u003ch3 data-start=\"2526\" data-end=\"2539\"\u003e\u003cstrong data-start=\"2530\" data-end=\"2537\"\u003eFAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"2541\" data-end=\"2727\"\u003e\u003cstrong data-start=\"2541\" data-end=\"2586\"\u003eQ1: What engines is this gasket made for?\u003c\/strong\u003e\u003cbr data-start=\"2586\" data-end=\"2589\"\u003eIt’s for \u003cstrong data-start=\"2598\" data-end=\"2630\"\u003eV6 and V8 MerCruiser engines\u003c\/strong\u003e with 1-piece thermostat housings, including \u003cstrong data-start=\"2675\" data-end=\"2703\"\u003e4.5L and 6.2L MPI models\u003c\/strong\u003e (2A456613 and newer).\u003c\/p\u003e\n\u003cp data-start=\"2729\" data-end=\"2857\"\u003e\u003cstrong data-start=\"2729\" data-end=\"2753\"\u003eQ2: What does it do?\u003c\/strong\u003e\u003cbr data-start=\"2753\" data-end=\"2756\"\u003eIt seals the thermostat housing, keeping coolant contained and ensuring steady engine temperatures.\u003c\/p\u003e\n\u003cp data-start=\"2859\" data-end=\"2981\"\u003e\u003cstrong data-start=\"2859\" data-end=\"2897\"\u003eQ3: How often should I replace it?\u003c\/strong\u003e\u003cbr data-start=\"2897\" data-end=\"2900\"\u003eReplace it anytime you remove the thermostat housing or notice coolant seepage.\u003c\/p\u003e\n\u003cp data-start=\"2983\" data-end=\"3097\"\u003e\u003cstrong data-start=\"2983\" data-end=\"3011\"\u003eQ4: What’s it made from?\u003c\/strong\u003e\u003cbr data-start=\"3011\" data-end=\"3014\"\u003eIt’s a \u003cstrong data-start=\"3021\" data-end=\"3051\"\u003emarine-grade rubber O-ring\u003c\/strong\u003e that resists heat, pressure, and vibration.\u003c\/p\u003e\n\u003cp data-start=\"3099\" data-end=\"3258\"\u003e\u003cstrong data-start=\"3099\" data-end=\"3138\"\u003eQ5: Why OEM instead of aftermarket?\u003c\/strong\u003e\u003cbr data-start=\"3138\" data-end=\"3141\"\u003e\u003cstrong data-start=\"3141\" data-end=\"3164\"\u003eMercury OEM gaskets\u003c\/strong\u003e are engineered for exact fit and durability, ensuring reliable performance where it counts.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46940835905827,"sku":"27-806871Q","price":7.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/806871q_main.jpg?v=1760631199","url":"https:\/\/partsvu.com\/en-ca\/products\/gasket-27-806871q","provider":"PartsVu","version":"1.0","type":"link"}