{"product_id":"marine-thermostat-kit-142f-with-gasket-replaces-crusader-97361-for-pleasurecraft-ch190-ch220-ch270-ch350-sierra-18-3671","title":"Sierra 18-3671 Thermostat Kit, 142 Degree, Replaces Mallory 9-43154, Crusader 97361, GLM 13410, Pleasurecraft RP026002E","description":"\u003cp\u003eThe Sierra 18-3671 Thermostat Kit is a complete replacement kit for marine engine cooling systems, providing everything needed to restore proper engine operating temperature in a single package. The kit is built around a 142 degree thermostat, which controls coolant flow so the engine reaches and holds its correct operating temperature for efficient combustion, reduced wear, and reliable performance on the water.\u003c\/p\u003e\u003cp\u003eRather than selling the thermostat alone, Sierra packages the 18-3551 thermostat together with the matching 18-0875 thermostat gasket, so the seal between the thermostat housing and the engine block is replaced at the same time as the thermostat itself. This is the recommended practice for any thermostat replacement, since reusing an old gasket can lead to coolant leaks or an improper seal even when the new thermostat is functioning correctly.\u003c\/p\u003e\u003cp\u003eThis kit is a direct equivalent for a number of OEM and aftermarket thermostat part numbers used across several marine engine and sterndrive brands, making it a convenient single-source replacement for boat owners and marine technicians who need to cross-reference an original part number to a current, available thermostat kit.\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 18-3671\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e 18-3551 Thermostat, 18-0875 Thermostat Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Rating:\u003c\/strong\u003e 142 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.19 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999563095\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits marine engines and sterndrives that use the OEM thermostats listed below under Replaces (OEM).\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCrusader 97361\u003c\/li\u003e\n\u003cli\u003eGLM 13410\u003c\/li\u003e\n\u003cli\u003eMallory 9-43154\u003c\/li\u003e\n\u003cli\u003ePleasurecraft RP026002E\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-3671 Thermostat Kit?\u003c\/strong\u003e The kit contains an 18-3551 thermostat and an 18-0875 thermostat gasket, so the thermostat and its sealing gasket are replaced together in one purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat temperature is the 18-3671 thermostat rated for?\u003c\/strong\u003e The thermostat included in the Sierra 18-3671 kit is rated at 142 degrees, which is the temperature at which it opens to allow coolant to flow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3671 kit include a gasket, or just the thermostat?\u003c\/strong\u003e It includes both: the 18-0875 thermostat gasket ships along with the 18-3551 thermostat inside the Sierra 18-3671 kit, so no separate gasket purchase is needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-3671 the same as Mallory 9-43154?\u003c\/strong\u003e Yes, Sierra 18-3671 is the direct cross-reference for Mallory part number 9-43154.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the Sierra 18-3671 thermostat kit replace?\u003c\/strong\u003e This kit replaces Crusader 97361, GLM 13410, Mallory 9-43154, and Pleasurecraft RP026002E.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3671 Thermostat Kit weigh?\u003c\/strong\u003e The complete kit weighs 0.19 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-3671 kit is a genuine Sierra part, identified by Sierra part number 18-3671 and UPC 030999563095.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill I need to replace the gasket separately when I install this thermostat?\u003c\/strong\u003e No, the Sierra 18-3671 kit already includes the 18-0875 thermostat gasket along with the 18-3551 thermostat, so both parts are replaced in the same job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this thermostat kit on a Crusader or Pleasurecraft engine?\u003c\/strong\u003e Yes, the Sierra 18-3671 kit cross-references to Crusader 97361 and Pleasurecraft RP026002E, so it is a direct equivalent for engines that originally used those part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3671 Thermostat Kit?\u003c\/strong\u003e The UPC for this kit is 030999563095.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988157313243,"sku":"SIE-18-3671","price":26.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3671_lg__78553.1558125020.500.750.jpg?v=1785188216","url":"https:\/\/www.goodvibesmarina.com\/products\/marine-thermostat-kit-142f-with-gasket-replaces-crusader-97361-for-pleasurecraft-ch190-ch220-ch270-ch350-sierra-18-3671","provider":"Good Vibes Marina","version":"1.0","type":"link"}