{"product_id":"marine-thermostat-kit-18-3672-for-johnson-evinrude-200-235-hp-outboards-1977-1985","title":"Sierra Thermostat Kit 18-3672, Fits Johnson\/Evinrude 200 HP (1977-83) and 235 HP (1978-85) Outboards","description":"\u003cp\u003eThis Sierra thermostat kit, part number 75-00456, is a direct replacement for outboard motor part 18-3672 and is built for owners who need to restore correct cooling system operation on Johnson\/Evinrude (OMC\/BRP) outboards. A thermostat regulates engine operating temperature by opening and closing to control coolant flow, and a worn, stuck, or corroded unit is a common cause of overheating or an engine that runs too cool, both of which reduce efficiency and can lead to premature wear. Replacing the thermostat with a properly sized unit restores the engine to its designed operating temperature range, helping protect internal components and keep fuel combustion efficient.\u003c\/p\u003e\u003cp\u003eThis kit is application-specific rather than a universal part, matching the thermostat used on Johnson\/Evinrude 200 HP outboards from 1977-83 and 235 HP outboards from 1978-85. Confirming your engine's horsepower and model year against this fitment before ordering will ensure you get the correct thermostat for your motor. At 0.063 pounds, this is a small, lightweight component intended to be installed as part of routine cooling system maintenance or when troubleshooting an overheating condition.\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 75-00456\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 18-3672\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.063 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 840080484433\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Outboard thermostat kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude (OMC\/BRP) 200 HP outboards, 1977-83\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude (OMC\/BRP) 235 HP outboards, 1978-85\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e18-3672\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does Sierra thermostat kit 75-00456 fit?\u003c\/strong\u003e This kit fits Johnson\/Evinrude (OMC\/BRP) outboards rated 200 HP from 1977-83 and 235 HP from 1978-85. Confirm your engine's horsepower and model year match before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 75-00456 the same as OEM part 18-3672?\u003c\/strong\u003e Yes, Sierra part 75-00456 is a direct replacement for OEM thermostat 18-3672 on the listed Johnson\/Evinrude 200 HP and 235 HP outboard applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this thermostat kit weigh?\u003c\/strong\u003e The Sierra thermostat kit, part 75-00456, weighs 0.063 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this Sierra thermostat kit?\u003c\/strong\u003e The UPC for Sierra part 75-00456 is 840080484433.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this thermostat work on any outboard, or is it application-specific?\u003c\/strong\u003e Part 75-00456 is application-specific, not universal, and is built for Johnson\/Evinrude 200 HP (1977-83) and 235 HP (1978-85) outboards only.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the signs I need to replace my outboard's thermostat?\u003c\/strong\u003e An engine that overheats, runs unusually cool, or has erratic temperature gauge readings often points to a failed thermostat; Sierra kit 75-00456 replaces the OEM 18-3672 unit on the applicable Johnson\/Evinrude models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e This is a Sierra-branded thermostat kit, part number 75-00456, manufactured as a replacement for OEM part 18-3672.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the kit include the thermostat and gasket, or just the thermostat?\u003c\/strong\u003e This is listed as a thermostat kit under part number 75-00456; specific included components beyond the thermostat itself are not detailed further here.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install this thermostat myself?\u003c\/strong\u003e Thermostat replacement on Johnson\/Evinrude 200 HP and 235 HP outboards is a routine maintenance task that many owners perform themselves, though following your engine's service procedure is recommended when installing Sierra part 75-00456.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat horsepower and year ranges does OEM number 18-3672 cover?\u003c\/strong\u003e OEM thermostat 18-3672, replaced by Sierra kit 75-00456, covers Johnson\/Evinrude 200 HP outboards from 1977-83 and 235 HP outboards from 1978-85.\u003c\/p\u003e","brand":"EMP","offers":[{"title":"Default Title","offer_id":48991291998427,"sku":"EMP-75-00456","price":20.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/EMP_75-00456_Mercury_BRP_Thermostat_Kit__76449.1722346931.500.750.jpg?v=1785329187","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-thermostat-kit-18-3672-for-johnson-evinrude-200-235-hp-outboards-1977-1985","provider":"Good Vibes Marina","version":"1.0","type":"link"}