{"product_id":"quicksilver-replacement-thermostat-kit-for-mercury-mariner-135-200hp-v6-75692q2-2-thermostats-gaskets","title":"Quicksilver Replacement Thermostat Kit for Mercury\/Mariner 135-200hp V6 — 75692Q2, 2 Thermostats \u0026 Gaskets","description":"\u003cp\u003e\u003cstrong\u003eQuicksilver 75692Q2 is a direct-fit replacement thermostat kit engineered for select Mercury and Mariner V6 outboards from 135 to 200 horsepower.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your engine cooling is underperforming or your service manual lists 75692Q2 as the correct part, this genuine Quicksilver thermostat kit restores proper coolant regulation and maintains intended operating temperature ranges. Quicksilver, the OEM supplier to Mercury Marine, designs and tests its parts to match factory specifications so your outboard runs as intended without guesswork.\u003c\/p\u003e\n\n\u003ch3\u003eWhich engines and serial ranges use the 75692Q2 thermostat?\u003c\/h3\u003e\n\u003cp\u003eThis kit fits specific Mercury and Mariner V6 outboards: 135–150hp units with serial A9046446 and up, 175hp units with serial C100861 and up, and 200hp units with serial 6435503 and up. Always verify the part number against your owner's or service manual to confirm compatibility before ordering or installing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e135–150hp V6: serial No. A9046446 and higher\u003c\/li\u003e\n  \u003cli\u003e175hp V6: serial No. C100861 and higher\u003c\/li\u003e\n  \u003cli\u003e200hp V6: serial No. 6435503 and higher\u003c\/li\u003e\n  \u003cli\u003eCheck your manual for specific application notes and install steps\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the Quicksilver 75692Q2 kit and why it matters?\u003c\/h3\u003e\n\u003cp\u003eThe kit includes two thermostats and two rubber gaskets—one thermostat and gasket per bank—so you replace the complete set used on V6 heads. Replacing both thermostats at once helps ensure balanced cooling across cylinders and avoids mixing old and new components that can compromise performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo thermostats for both engine banks\u003c\/li\u003e\n  \u003cli\u003eTwo rubber gaskets for reliable sealing\u003c\/li\u003e\n  \u003cli\u003eFactory-quality materials match original equipment specifications\u003c\/li\u003e\n  \u003cli\u003eSold as a complete set to streamline service procedures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the thermostat affect engine performance and longevity?\u003c\/h3\u003e\n\u003cp\u003eThe thermostat regulates coolant flow to maintain the engine within its designed temperature window. Correct operating temperature promotes fuel efficiency, consistent power delivery, and faster warm-up while reducing thermal stress on components.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaintains optimal engine temperature for efficient combustion\u003c\/li\u003e\n  \u003cli\u003ePrevents overcooling or overheating that can harm components\u003c\/li\u003e\n  \u003cli\u003eSupports stable operating conditions for emissions and performance\u003c\/li\u003e\n  \u003cli\u003eFactory match minimizes leak and fitment issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I replace the thermostat and what precautions are needed?\u003c\/h3\u003e\n\u003cp\u003eRefer to your owner's or service manual for step-by-step removal and installation instructions specific to your outboard model. Work on a cool engine, follow torque specs, and inspect mounting surfaces and coolant passages for debris before seating new gaskets and thermostats.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFollow the service manual for removal of the old thermostat\u003c\/li\u003e\n  \u003cli\u003eInstall new gaskets and torque bolts to factory specs\u003c\/li\u003e\n  \u003cli\u003eFlush cooling passages if necessary before installation\u003c\/li\u003e\n  \u003cli\u003eStart and warm the engine to check for leaks and proper operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Boat owners, marine technicians, and do-it-yourselfers who operate Mercury or Mariner V6 outboards in the 135–200hp range and need an OEM-grade replacement thermostat. Choose Quicksilver 75692Q2 when you want a factory-matched part that simplifies servicing, reduces the risk of fitment issues, and helps restore correct engine cooling behavior without compromise.\u003c\/p\u003e\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 75692Q2 the correct thermostat for my Mercury outboard?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Check your owner's or service manual for the part number and serial range; compatible 135–200hp V6 models are listed there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include gaskets and how many thermostats?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the kit contains two thermostats and two rubber gaskets, one set for each V6 bank.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":48081065312414,"sku":"B001HBQUIC","price":85.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/quicksilver-75692q2-front-of-kit.jpg?v=1785795763","url":"https:\/\/northtrailauto.ca\/products\/quicksilver-replacement-thermostat-kit-for-mercury-mariner-135-200hp-v6-75692q2-2-thermostats-gaskets","provider":"North Trail Auto","version":"1.0","type":"link"}