{"product_id":"merc-1198","title":"Mercury Outboard 140°F Thermostat - 8M0119207","description":"\u003cp\u003eThe \u003cstrong\u003eMercury Quicksilver 8M0119207\u003c\/strong\u003e is a genuine Mercury Marine OEM \u003cstrong\u003e140°F \/ 60°C thermostat\u003c\/strong\u003e used in select Mercury, Mariner, and SeaPro outboard cooling systems. The thermostat regulates cooling-water flow through the engine by opening at the specified temperature, helping the outboard warm up properly and maintain the correct operating range during use.\u003c\/p\u003e\n\u003cp\u003eThis thermostat should be matched by exact outboard serial number, horsepower, thermostat housing layout, and Mercury parts diagram before ordering.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine Mercury Marine OEM thermostat.\u003c\/li\u003e\n\u003cli\u003eMercury\/Quicksilver part number: \u003cstrong\u003e8M0119207\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eOperating temperature: \u003cstrong\u003e140°F \/ 60°C\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eUPC reference: \u003cstrong\u003e745061624085\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eUsed in select small-to-midrange Mercury, Mariner, and SeaPro outboard cooling systems.\u003c\/li\u003e\n\u003cli\u003eHelps regulate engine temperature and cooling-water flow.\u003c\/li\u003e\n\u003cli\u003eImportant replacement part for overheating, cold-running, slow warm-up, unstable temperature, or stuck-thermostat symptoms.\u003c\/li\u003e\n\u003cli\u003eSupersedes earlier Mercury thermostat references in supported applications.\u003c\/li\u003e\n\u003cli\u003eRelated gasket reference supplied: \u003cstrong\u003e27-853702005\u003c\/strong\u003e — verify by serial number and thermostat housing diagram.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eEngine Compatibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eCommon application context includes select Mercury and Mariner outboards where the factory cooling-system diagram calls for \u003cstrong\u003e8M0119207\u003c\/strong\u003e, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSelect \u003cstrong\u003e8 HP and 9.9 HP FourStroke\u003c\/strong\u003e 209cc applications where specified.\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003e15 HP and 20 HP carbureted FourStroke\u003c\/strong\u003e applications where specified.\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003e25 HP and 30 HP EFI FourStroke\u003c\/strong\u003e applications where specified.\u003c\/li\u003e\n\u003cli\u003eSelect \u003cstrong\u003eJet\u003c\/strong\u003e and \u003cstrong\u003eSeaPro\u003c\/strong\u003e configurations where the Mercury parts diagram confirms this thermostat.\u003c\/li\u003e\n\u003cli\u003eCommon serial-number references include \u003cstrong\u003e0R042475 and higher\u003c\/strong\u003e, \u003cstrong\u003e0R235949 through 0R833819\u003c\/strong\u003e, and \u003cstrong\u003e0R106999 and higher\u003c\/strong\u003e, depending on horsepower and engine family.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse this thermostat only where the Mercury parts diagram or service manual specifically calls for \u003cstrong\u003e8M0119207\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eSerial Number Fitment Notice\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eConfirm fitment by outboard serial number, horsepower, model family, cooling-system configuration, thermostat housing style, gasket type, and required opening temperature before ordering. Similar Mercury portable outboards can use different thermostats depending on production range, EFI\/carbureted configuration, SeaPro or standard model setup, and thermostat housing design.\u003c\/p\u003e\n\u003cp\u003eDo not substitute a different temperature rating unless the Mercury service manual specifically calls for it.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eWhen This Part Needs Replacement\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eReplace the thermostat if the engine runs too cold, overheats, takes too long to warm up, has unstable operating temperature, shows weak temperature regulation, or fails thermostat testing. Replacement is also recommended during cooling-system service if the thermostat is corroded, scaled, stuck open, stuck closed, physically damaged, or removed from the housing during repair.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eDrain or lower the cooling water level as required before removing the thermostat housing. Clean the thermostat seat and housing surfaces carefully, then replace the gasket or seal shown in the Mercury parts diagram. Do not reuse a compressed, torn, swollen, or hardened gasket.\u003c\/p\u003e\n\u003cp\u003eInstall the thermostat in the correct orientation and tighten the housing bolts to the Mercury service-manual specification for the exact engine. After installation, run the outboard on a proper water supply and confirm stable temperature control, strong cooling-water flow, and no leaks around the thermostat housing.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eAlternate\/Superseded Part Numbers\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e8M0119207\u003c\/strong\u003e — current Mercury\/Quicksilver OEM thermostat part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e855676002\u003c\/strong\u003e — earlier Mercury reference; verify by serial number and diagram\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e855676005\u003c\/strong\u003e — earlier Mercury reference; verify by serial number and diagram\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e745061624085\u003c\/strong\u003e — UPC reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e27-853702005\u003c\/strong\u003e — related thermostat gasket reference supplied; verify by diagram before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eRelated Service Parts\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThermostat service may also require the matching thermostat gasket, housing seal, housing cover hardware, cooling-system inspection parts, and water pump service parts depending on the engine condition. Confirm all related parts by outboard serial number before ordering.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eParts Desk Insight\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eA thermostat that is stuck open can make an outboard run too cold, idle poorly, or build carbon because the engine never reaches its designed operating range. A thermostat that is stuck closed can cause overheating and serious engine damage. Match the thermostat by serial number and temperature rating, then replace the housing gasket during the same service.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships same or next day for fast Canada wide shipping. ⚓\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563915673636,"sku":"8M0119207","price":127.27,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/b38e736e-afcf-4f6f-a746-4cef0532492e.png?v=1781295666","url":"https:\/\/marisolmarine.com\/products\/merc-1198","provider":"Marisol Marine Company","version":"1.0","type":"link"}