{"product_id":"mercury-thermostat-8m6010300","title":"Mercury – Quicksilver Thermostat | Cooling System Components | Marine-Grade Construction | 8M6010300","description":"\u003ch3\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury – Quicksilver Thermostat | Cooling System Components | Marine-Grade Construction | 8M6010300\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThere’s a quiet confidence that comes from knowing your outboard is running at the exact temperature it was designed for. When the water’s calm and the morning air is cool, or when you’re pushing across choppy afternoon swells, you want your engine to stay steady and predictable. That’s exactly what the Quicksilver 8M6010300 thermostat delivers. It keeps your Yamaha 75–90 horsepower four-stroke running in its sweet spot — not too hot, not too cold — so you can focus on the water ahead, not what’s happening under the cowl.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThermostat engineered for Yamaha 75–90 horsepower four-stroke outboards\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eMee\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003ets all original equipment manufacturer specifications for temperature regulation\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDirect replacement for Yamaha OEM part number 6FP-12411-00\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eReplaces aftermarket cross-reference 18-3641\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThermostat only; hardware, gaskets, and seals sold separately\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eBuilt to withstand long-term marine exposure and fluctuating water conditions\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003ePr\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eo\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003evides consistent warm-up times and optimal engine operating temperature\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFits Yamaha F75, VF75, F90, and VF90 four-stroke models\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIdeal for fishing boats, bay boats, pontoons, small center consoles, and aluminum skiffs\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eDesigned for outboards used in lakes, rivers, inshore saltwater, and offshore environments\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eSuitable for both recreational and light commercial use\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePe\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003erformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eA well-regulated engine feels different — smoother, steadier, more predictable when you throttle up or settle into a slow drift. This Quicksilver thermostat acts as the gatekeeper of your cooling system, allowing the engine to warm up quickly and maintain the temperature range it needs for efficient combustion and long-term durability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhe\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003en a thermostat ages or fails, small problems start creeping in: sluggish warm-up, harder starts, uneven idle, even increased fuel use. Replacing it with a part that fits precisely and reacts reliably brings everything back into balance. Wit\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eh the 8M6010300 thermostat in place, the engine holds its temperature the way it should, the power curve feels tighter, and the whole outboard responds with the clean, confident behavior you expect from a Yamaha.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eInstallation is straightforward for most boat owners, and the difference is something you’ll notice from the first run — steadier performance, smoother transitions, and a sense of security that your engine isn’t fighting hidden temperature swings.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhen it comes to engine temperature control, precision is everything. An a\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eftermarket thermostat might look the same, but variations in calibration or build quality can quietly wear on your outboard over time. Choosing a genuine Quicksilver thermostat means you’re installing a part built to Yamaha’s original standards, tested to handle real marine conditions, and trusted by boaters who don’t like surprises on the water.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIt’s\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e the kind of investment that pays for itself in reliability, fuel efficiency, and long engine life. If you want a part that fits right the first time and performs exactly as intended, OEM is the way to go.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: Which engines does this thermostat fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits Yamaha 75–90 horsepower four-stroke models, including F75, VF75, F90, and VF90.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What makes it better than aftermarket options?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e OEM calibration, tighter tolerances, and proven long-term reliability in real marine environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm it’s the right replacement?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Match it to Yamaha OEM number 6FP-12411-00 or consult your owner’s manual.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Can it be used in saltwater and freshwater?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Absolutely — it’s engineered for both and built to resist corrosion.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation simple?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes. Most boaters with basic tools can install it quickly, especially with a service manual.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46935057662243,"sku":"8M6010300","price":53.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8M6010300_Main.jpg?v=1760631527","url":"https:\/\/partsvu.com\/en-mx\/products\/mercury-thermostat-8m6010300","provider":"PartsVu","version":"1.0","type":"link"}