{"product_id":"quicksilver-mercruiser-replacement-thermostat-140-f-oem-grade-engine-cooling-control","title":"Quicksilver MerCruiser Replacement Thermostat 140°F — OEM-grade engine cooling control","description":"\u003cp\u003e\u003cstrong\u003eThe Quicksilver 8M0089715 is a 140°F replacement thermostat engineered for MerCruiser sterndrive engines that use standard cooling systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eKeeping your marine engine at the correct operating temperature is essential for reliable performance and long life. The Quicksilver 8M0089715 thermostat is an OEM-grade replacement part designed to restore proper coolant flow and temperature regulation in compatible MerCruiser sterndrive applications. Quicksilver — a long-established supplier to Mercury Marine and other powersports brands — produces this part to the same design and testing standards used in original equipment, helping you maintain factory-caliber cooling control.\u003c\/p\u003e\n\n\u003ch3\u003eHow will this 140°F thermostat affect engine performance?\u003c\/h3\u003e\n\u003cp\u003eInstalling the correct temperature thermostat helps the engine reach and hold its optimal operating temperature quickly and consistently. That supports fuel efficiency, reduces excessive wear caused by overcooling, and helps the engine deliver intended power under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTargets 140°F to stabilize coolant temperature\u003c\/li\u003e\n  \u003cli\u003ePrevents prolonged cold-running conditions that reduce efficiency\u003c\/li\u003e\n  \u003cli\u003eHelps maintain designed combustion and emissions characteristics\u003c\/li\u003e\n  \u003cli\u003eRestores factory thermal control when the original thermostat fails\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich MerCruiser models use part 8M0089715 and how do I confirm fit?\u003c\/h3\u003e\n\u003cp\u003eThis replacement matches the cooling specification for a range of MerCruiser sterndrive engines that call for a 140°F thermostat. Always verify compatibility by consulting your boat’s owner’s manual, service manual, or parts catalog to ensure correct application.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCheck the engine model and serial number against your manual\u003c\/li\u003e\n  \u003cli\u003eConfirm the specified thermostat temperature is 140°F\u003c\/li\u003e\n  \u003cli\u003eContact an authorized dealer if you’re unsure about fitment details\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow simple is installation and what tools are required?\u003c\/h3\u003e\n\u003cp\u003eReplacement is straightforward for anyone with basic mechanical skills and common shop tools. Typical removal of a failed thermostat and installing the new unit can be performed with hand tools, but follow the instructions in your engine’s service manual for proper procedure and torque values.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequires standard hand tools (wrenches, screwdrivers) for most installations\u003c\/li\u003e\n  \u003cli\u003eFollow manufacturer's removal and installation steps to avoid leaks\u003c\/li\u003e\n  \u003cli\u003eInspect gaskets, seals, and coolant after installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and quality standards back this Quicksilver part?\u003c\/h3\u003e\n\u003cp\u003eQuicksilver parts are engineered for marine use and subjected to rigorous testing to meet original equipment expectations. This thermostat is built to withstand the thermal cycles and operating environments common to sterndrive cooling systems.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eManufactured to OEM design and performance standards\u003c\/li\u003e\n  \u003cli\u003eTested for durability in marine cooling conditions\u003c\/li\u003e\n  \u003cli\u003eSupports factory-level performance and protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Quicksilver 8M0089715 thermostat is aimed at boat owners, marine technicians, and service shops who maintain MerCruiser sterndrive engines that specify a 140°F thermostat. It’s suitable for anyone seeking an OEM-quality replacement to restore proper engine temperature control — from DIY owners comfortable with basic repairs to professionals performing scheduled maintenance. Before you buy, confirm the thermostat temperature and part number in your owner’s or service manual to ensure proper fit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e140°F thermostat\u003c\/li\u003e\n  \u003cli\u003eUse only the temperature thermostat listed in your owner's manual or service manual\u003c\/li\u003e\n  \u003cli\u003eProper engine cooling temperature ensures peak performance and highest efficiency\u003c\/li\u003e\n  \u003cli\u003eEasy to replace with common shop tools\u003c\/li\u003e\n  \u003cli\u003eSee your owner's manual for removal of non-functioning thermostat and replacement of new thermostat\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the 8M0089715 thermostat a direct replacement for MerCruiser sterndrives?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, when your engine's manual lists a 140°F thermostat, 8M0089715 is the OEM-compatible replacement. Verify your engine model and serial number first.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install this thermostat myself?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Many owners can replace it with basic hand tools; follow your service manual’s removal and installation steps for proper sealing and torque.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":48086119678110,"sku":"B001HBN1IO","price":42.19,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/quicksilver-8m0089715-front-view.jpg?v=1785885292","url":"https:\/\/northtrailauto.ca\/products\/quicksilver-mercruiser-replacement-thermostat-140-f-oem-grade-engine-cooling-control","provider":"North Trail Auto","version":"1.0","type":"link"}