{"product_id":"thermostat-gasket-5-zz","title":"Mercury 27-8M0204687 Thermostat Gasket","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0056\/9429\/2079\/files\/66102c75f8d746adc03b88e1_brand-mercury-precision-parts.png?v=1777130741\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-69ea37f2-9634-83ea-95ed-3658eca80b3e-12\" data-is-intersecting=\"true\"\u003e\n\u003cdiv class=\"relative w-full overflow-visible\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none [--shadow-height:45px] has-data-writing-block:pointer-events-none has-data-writing-block:-mt-(--shadow-height) has-data-writing-block:pt-(--shadow-height) [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-69ea37f2-9634-83ea-95ed-3658eca80b3e-12\" data-turn-id-container=\"request-69ea37f2-9634-83ea-95ed-3658eca80b3e-12\" data-testid=\"conversation-turn-210\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"e6620c23-c91b-421e-8866-52e568150fb0\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003ch2 data-section-id=\"oflzpw\" data-start=\"0\" data-end=\"43\"\u003eMercury 27-8M0204687 Thermostat Gasket\u003c\/h2\u003e\n\u003cp data-start=\"46\" data-end=\"370\"\u003eEnsure a reliable seal and proper cooling system performance with the Mercury 27-8M0204687 Thermostat Gasket. Designed as a genuine OEM replacement, this gasket creates a secure seal between the thermostat housing and cooling system components to help prevent coolant leaks and maintain stable engine operating temperatures.\u003c\/p\u003e\n\u003cp data-start=\"372\" data-end=\"733\"\u003eA thermostat gasket may be small, but it plays an important role in maintaining cooling system pressure and proper coolant circulation. Over time, gaskets can become brittle, compressed, or damaged from repeated heat cycles and coolant exposure. Replacing the gasket during thermostat service helps prevent leaks and ensures dependable cooling system operation.\u003c\/p\u003e\n\u003cp data-start=\"735\" data-end=\"1077\"\u003eManufactured to Mercury Marine factory specifications, the 27-8M0204687 gasket is built using durable marine-grade materials designed to withstand harsh engine compartment conditions. Designed as a direct-fit replacement, it provides reliable sealing performance and straightforward installation for compatible Mercury and MerCruiser engines.\u003c\/p\u003e\n\u003chr data-start=\"1079\" data-end=\"1082\"\u003e\n\u003ch3 data-section-id=\"lmqikf\" data-start=\"1084\" data-end=\"1112\"\u003eCommon Engine Fitments\u003c\/h3\u003e\n\u003cp data-start=\"1113\" data-end=\"1232\"\u003eThe Mercury 27-8M0204687 thermostat gasket is commonly used on select MerCruiser and Mercury Marine engines, including:\u003c\/p\u003e\n\u003cul data-start=\"1234\" data-end=\"1400\"\u003e\n\u003cli data-section-id=\"q2hj8s\" data-start=\"1234\" data-end=\"1257\"\u003eMerCruiser 4.5L MPI\u003c\/li\u003e\n\u003cli data-section-id=\"1uz23bd\" data-start=\"1258\" data-end=\"1281\"\u003eMerCruiser 6.2L MPI\u003c\/li\u003e\n\u003cli data-section-id=\"ei4nmu\" data-start=\"1282\" data-end=\"1304\"\u003eMerCruiser 350 MAG\u003c\/li\u003e\n\u003cli data-section-id=\"sc8cpv\" data-start=\"1305\" data-end=\"1327\"\u003eMerCruiser 377 MAG\u003c\/li\u003e\n\u003cli data-section-id=\"7ofk5w\" data-start=\"1328\" data-end=\"1350\"\u003eMerCruiser 8.2 MAG\u003c\/li\u003e\n\u003cli data-section-id=\"1bjv222\" data-start=\"1351\" data-end=\"1400\"\u003eMercury Racing sterndrive engine applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1402\" data-end=\"1440\"\u003eThese engines are frequently found in:\u003c\/p\u003e\n\u003cul data-start=\"1442\" data-end=\"1630\"\u003e\n\u003cli data-section-id=\"wmzc5h\" data-start=\"1442\" data-end=\"1478\"\u003eSea Ray sport boats and cruisers\u003c\/li\u003e\n\u003cli data-section-id=\"1qbmkhk\" data-start=\"1479\" data-end=\"1511\"\u003eChaparral SSX and SSi models\u003c\/li\u003e\n\u003cli data-section-id=\"1mt7yc7\" data-start=\"1512\" data-end=\"1541\"\u003eFour Winns Horizon series\u003c\/li\u003e\n\u003cli data-section-id=\"agafyp\" data-start=\"1542\" data-end=\"1578\"\u003eCrownline bowriders and cruisers\u003c\/li\u003e\n\u003cli data-section-id=\"pgmj84\" data-start=\"1579\" data-end=\"1600\"\u003eRegal sport boats\u003c\/li\u003e\n\u003cli data-section-id=\"1wjbuyd\" data-start=\"1601\" data-end=\"1630\"\u003eFormula performance boats\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1632\" data-end=\"1835\"\u003eThe 27-8M0204687 gasket is commonly used in thermostat housing assemblies on freshwater and closed-cooling MerCruiser systems where maintaining proper coolant sealing is essential for engine reliability.\u003c\/p\u003e\n\u003cp data-start=\"1837\" data-end=\"2015\"\u003eFitment may vary depending on engine serial number and cooling system configuration, so confirming compatibility with part number \u003cstrong data-start=\"1967\" data-end=\"1983\"\u003e27-8M0204687\u003c\/strong\u003e before ordering is recommended.\u003c\/p\u003e\n\u003chr data-start=\"2017\" data-end=\"2020\"\u003e\n\u003ch3 data-section-id=\"1iz91iu\" data-start=\"2022\" data-end=\"2038\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"2039\" data-end=\"2332\"\u003e\n\u003cli data-section-id=\"aj18zf\" data-start=\"2039\" data-end=\"2087\"\u003eGenuine Mercury Marine OEM thermostat gasket\u003c\/li\u003e\n\u003cli data-section-id=\"u01cqw\" data-start=\"2088\" data-end=\"2136\"\u003eHelps maintain proper cooling system sealing\u003c\/li\u003e\n\u003cli data-section-id=\"7majwc\" data-start=\"2137\" data-end=\"2181\"\u003ePrevents coolant leaks and pressure loss\u003c\/li\u003e\n\u003cli data-section-id=\"1qabny6\" data-start=\"2182\" data-end=\"2236\"\u003eDesigned for MerCruiser and Mercury Marine engines\u003c\/li\u003e\n\u003cli data-section-id=\"1l8iw4b\" data-start=\"2237\" data-end=\"2283\"\u003eMarine-grade material built for durability\u003c\/li\u003e\n\u003cli data-section-id=\"1fc4z38\" data-start=\"2284\" data-end=\"2332\"\u003eDirect-fit replacement for easy installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2334\" data-end=\"2337\"\u003e\n\u003ch3 data-section-id=\"b0fg9y\" data-start=\"2339\" data-end=\"2377\"\u003eWhy Replace a Thermostat Gasket?\u003c\/h3\u003e\n\u003cp data-start=\"2378\" data-end=\"2643\"\u003eOld gaskets can lose flexibility and sealing ability over time, especially in high-heat marine environments. Replacing the gasket during thermostat service helps maintain cooling system efficiency and reduces the risk of leaks that could lead to overheating issues.\u003c\/p\u003e\n\u003cp data-start=\"2645\" data-end=\"2841\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eIf you’re servicing a compatible MerCruiser-powered boat, the Mercury 27-8M0204687 thermostat gasket delivers the OEM-quality fit and dependable sealing performance your cooling system depends on.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003cdiv class=\"contents\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Land 'N' Sea","offers":[{"title":"Default Title","offer_id":48754082545921,"sku":"710-27-8M0204687","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0056\/9429\/2079\/files\/278M0204687.jpg?v=1778348134","url":"https:\/\/inboardpartshq.com\/products\/thermostat-gasket-5-zz","provider":"Inboard Parts HQ","version":"1.0","type":"link"}