{"product_id":"merc-1314","title":"Mercury Quicksilver — Thermostat Gasket — 8M0204714","description":"\u003ch2\u003eMercury Quicksilver Thermostat Gasket 8M0204714\u003c\/h2\u003e\n\u003cp\u003eMercury Quicksilver 8M0204714 is a genuine OEM thermostat gasket used to seal the thermostat connection in the engine cooling system on a wide range of Mercury and Mariner outboards. It is the current replacement for earlier Mercury gasket numbers 62386 and 62386001.\u003c\/p\u003e\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMercury and Mariner 135 HP outboards\u003c\/li\u003e\n\u003cli\u003eMercury and Mariner 140 Jet 2.5L applications\u003c\/li\u003e\n\u003cli\u003eMercury and Mariner 150 HP outboards\u003c\/li\u003e\n\u003cli\u003eMercury and Mariner 175 HP outboards\u003c\/li\u003e\n\u003cli\u003eMercury and Mariner 200 HP outboards\u003c\/li\u003e\n\u003cli\u003eMercury V-200 EFI 2.5L applications\u003c\/li\u003e\n\u003cli\u003eMercury XR6 applications\u003c\/li\u003e\n\u003cli\u003eMercury Magnum III applications\u003c\/li\u003e\n\u003cli\u003eMercury and Mariner 150, 175, and 200 DFI 2.5L applications\u003c\/li\u003e\n\u003cli\u003eMercury 200 DFI Jet Drive applications\u003c\/li\u003e\n\u003cli\u003eAdditional thermostat-equipped outboards whose diagram specifies 62386, 62386001, or 8M0204714\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSerial-number fitment:\u003c\/strong\u003e Mercury used the earlier gasket numbers across different serial ranges before consolidating them under 8M0204714. Confirm the engine serial number and thermostat diagram before ordering rather than relying on horsepower alone.\u003c\/p\u003e\n\u003ch3\u003ePart Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent part number:\u003c\/strong\u003e 8M0204714\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatalog-form number:\u003c\/strong\u003e 27-8M0204714\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mercury Quicksilver\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Thermostat gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Engine cooling and thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupersedes:\u003c\/strong\u003e 62386 and 62386001\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproximate weight:\u003c\/strong\u003e 0.01 lb or 4.5 g\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine OEM thermostat gasket\u003c\/li\u003e\n\u003cli\u003eSeals the thermostat connection against cooling-water leakage\u003c\/li\u003e\n\u003cli\u003eUsed individually, with quantity confirmed by the engine diagram\u003c\/li\u003e\n\u003cli\u003eMany Mercury 2.5L V6 applications use two thermostat assemblies and may require two gaskets per engine\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Replace This Gasket\u003c\/h3\u003e\n\u003cp\u003eReplace the gasket whenever the thermostat or thermostat cover is removed, cooling water is leaking at the thermostat connection, or the existing gasket is compressed, torn, hardened, or damaged. A previously compressed gasket should not be reused after the joint has been opened.\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cp\u003eClean the thermostat and mating surfaces without damaging them. Confirm that the thermostat, cover, gasket, and related components match the serial-number-specific diagram. On V6 engines with a thermostat on each cylinder bank, inspect both assemblies during the same service and replace every gasket disturbed during disassembly. Follow the applicable service procedure for thermostat orientation and fastener specifications.\u003c\/p\u003e\n\u003ch3\u003eTechnical FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow many gaskets are required?\u003c\/strong\u003e\u003cbr\u003eQuantity varies by engine. Many Mercury 2.5L V6 applications use two thermostats and may require two gaskets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat earlier numbers does this gasket replace?\u003c\/strong\u003e\u003cbr\u003e8M0204714 supersedes Mercury 62386 and 62386001.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan fitment be confirmed by horsepower alone?\u003c\/strong\u003e\u003cbr\u003eNo. Match the engine serial number and thermostat diagram because the gasket spans multiple engine generations and cooling-system configurations.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e Installing a fresh thermostat seal whenever the thermostat cover is opened for inspection, cooling-system service, or related cylinder-head work.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMost common mistake:\u003c\/strong\u003e Ordering one gasket for a V6 application that uses a thermostat on each cylinder bank. Check the diagram quantity before starting service.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFitment guidance:\u003c\/strong\u003e Use the original part number or serial-number-specific cooling-system diagram as the primary fitment check rather than gasket appearance or horsepower alone.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563924455460,"sku":"8M0204714","price":4.25,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/217bfd06-1b9d-4e0f-b7dd-c8ca18674c12.png?v=1790108253","url":"https:\/\/marisolmarine.com\/products\/merc-1314","provider":"Marisol Marine Company","version":"1.0","type":"link"}