{"product_id":"sierra-18-3642-thermostat-kit-for-mercury-mariner-40hp-3-cylinder-outboards-replaces-oem-855676a1","title":"Sierra Thermostat Kit 18-3642 for Mercury Outboard Engines","description":"\u003cp\u003eThe Sierra 18-3642 Thermostat Kit is a replacement thermostat for Mercury outboard engine cooling systems. Sierra manufactures this kit to consistent dimensional and material standards so it installs as a direct, reliable replacement for a worn or failed thermostat in the engine's cooling circuit. Keeping the thermostat in good working order helps the engine maintain proper operating temperature, which protects against overheating and supports consistent engine performance on the water.\u003c\/p\u003e\u003cp\u003eThis kit is compact, with a body measuring 0.39 x 0.39 x 0.39 inches and a light overall weight of 0.08 pounds, making it easy to handle during a routine cooling-system service. It is identified by Sierra part number 18-3642 and is listed under Sierra's Mercury Outboard Thermostats and Gaskets product line, making it straightforward for boat owners and marine technicians to locate the correct part for a Mercury outboard cooling system service.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-3642\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury Outboard Thermostats \u0026amp; Gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.08 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282375492\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-3642?\u003c\/strong\u003e It is a Sierra Thermostat Kit, part number 18-3642, designed for the cooling system of Mercury outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the 18-3642 thermostat kit?\u003c\/strong\u003e The Sierra 18-3642 measures 0.39 x 0.39 x 0.39 inches, a compact size suited to Mercury outboard cooling systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3642 thermostat kit weigh?\u003c\/strong\u003e This thermostat kit weighs 0.08 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines is the 18-3642 thermostat kit intended for?\u003c\/strong\u003e The Sierra 18-3642 is listed under Sierra's Mercury Outboard Thermostats and Gaskets line, for use in Mercury outboard engine cooling systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3642 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-3642 is Sierra's own part number for this Thermostat Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3642 thermostat kit?\u003c\/strong\u003e The UPC for the Sierra Thermostat Kit 18-3642 is 808282375492.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I identify the correct thermostat kit for my Mercury outboard?\u003c\/strong\u003e Match the Sierra part number 18-3642 printed on the kit or listing to confirm it is the correct thermostat for your Mercury outboard cooling service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat product category does the 18-3642 thermostat kit fall under?\u003c\/strong\u003e Sierra classifies part 18-3642 within its Mercury Outboard Thermostats and Gaskets category.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988155740379,"sku":"SIE-18-3642","price":48.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3642__34682.1747363781.500.750.jpg?v=1785188014","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3642-thermostat-kit-for-mercury-mariner-40hp-3-cylinder-outboards-replaces-oem-855676a1","provider":"Good Vibes Marina","version":"1.0","type":"link"}