{"product_id":"mercury-thermostat-assy-8m0177662","title":"Mercury – Thermostat Assembly | V12 Verado \u0026 SeaPro Series | Composite \u0026 Stainless Components | 8M0177662","description":"\u003ch2\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury – Thermostat Assembly | V12 Verado \u0026amp; SeaPro Series | Composite \u0026amp; Stainless Components | 8M0177662\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOverview\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhen you run a boat powered by one of Mercury’s V12 giants, you get used to a certain level of confidence. You expect the throttle response to be instant, the temperature to stay steady, and the engine to feel as calm at idle as it does tearing across open water. A big part of that trust comes from the cooling system doing exactly what it should — quietly, consistently, in the background. The Mercury 8M0177662 Thermostat Assembly is one of those components you rarely see but rely on every single time you turn the key. \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKnowing that your engine is protected from overheating\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e brings a kind of peace you can feel, whether you’re pushing offshore or cruising home against a late-afternoon chop.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eComplete thermostat assembly designed for precise temperature regulation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eIncludes top and bottom housings, 160°F thermostat, 140°F thermostat, spring, retainer, gasket, O-ring, plate, and hardware\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eB\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003euilt with heat-resistant materials and corrosion-resistant components\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEnsures stable operating temperature under varying loads and conditions\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eExact-fit OEM replacement for select Mercury V12 engines\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eThis Mercury Marine part is designed for:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury 7.6L V12 600hp Verado\u003c\/span\u003e\u003c\/strong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e outboards\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMercury 7.6L V12 500hp SeaPro\u003c\/span\u003e\u003c\/strong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e outboards\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan data-preserver-spaces=\"true\"\u003eSerial number range: \u003c\/span\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003e3B060047–3B332191\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eC\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eommon boat applications include:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eLarge offshore center consoles\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eCommercial and patrol vessels\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHeavy-duty charter boats\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMulti-engine fishing platforms\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003ePerformance \u0026amp; Practical Benefits\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eOn a V12 outboard, temperature control isn’t just about avoiding overheating — it’s about keeping the engine in the sweet spot where fuel burns cleanly, power comes smoothly, and internal components last as long as they should. With the 8M0177662 thermostat assembly installed, you’ll notice your engine settling into a steady rhythm. Warm-up happens predictably. Running temperatures stay consistent whether you’re cruising at midrange or dropping back to idle near the dock.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eA worn or sticking thermostat can cause frustrating surges, reduced efficiency, and sometimes performance alarms that cut your day short. This OEM assembly restores the tight, confident feel you expect from a Mercury V12. The dual-thermostat setup manages temperature transitions with a smoothness you can feel in the helm controls — especially during long runs or when shifting frequently between low and high load.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eInstallation is straightforward with the included hardware, and\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003e once it’s in place, you’ll have the reassurance that your outboard is circulating coolant exactly the way Mercury engineered it to.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhy Buy OEM\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eHigh-horsepower outboards demand precision. A thermostat that’s just slightly off in temperature rating, response time, or fitment can change how the engine behaves, especially over long days in fluctuating conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eChoosing a genuine Mercury Marine thermostat assembly means:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eAccurate temperature regulation tailored to the V12 platform\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eMaterials tested against real-world marine heat cycles\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eLonger service life than generic alternatives\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eGuaranteed compatibility with the cooling passages and housings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-preserver-spaces=\"true\"\u003eConfidence that your engine is protected the way Mercury intended\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhen you’re running a V12, the stakes are high — OEM is the only choice that truly protects your investment.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan data-preserver-spaces=\"true\"\u003eFAQ\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ1: \u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eWhich Mercury engines does this thermostat assembly fit?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e It fits Mercury 7.6L V12 600hp Verado and 500hp SeaPro outboards within the listed serial range.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ2: What makes this different from aftermarket thermostats?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e OEM components match exact temperature specs and materials designed for the V12’s extreme operating environment.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ3: How do I confirm this is the correct replacement?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e M\u003c\/span\u003e\u003cspan data-preserver-spaces=\"true\"\u003eatch your engine model and serial number with your operator’s manual or parts diagram.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ4: Is it suitable for both freshwater and saltwater use?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Yes — the materials are engineered for full marine exposure.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-preserver-spaces=\"true\"\u003eQ5: Is installation straightforward?\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-preserver-spaces=\"true\"\u003e Most technicians and experienced boaters will find the assembly intuitive with standard tools.\u003c\/span\u003e\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":46935148429603,"sku":"8M0177662","price":541.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/8M0177662_Main.jpg?v=1760631469","url":"https:\/\/partsvu.com\/en-mx\/products\/mercury-thermostat-assy-8m0177662","provider":"PartsVu","version":"1.0","type":"link"}