{"product_id":"sierra-18-3677-marine-thermostat-kit-160f-for-volvo-penta-replaces-oem-3856961-3853983-includes-o-ring-gasket","title":"Sierra Thermostat Kit 18-3677 for Volvo Penta Engines, 160 Degree F, Replaces 3856961-2","description":"\u003cp\u003eThe Sierra 18-3677 Thermostat Kit is a complete marine engine cooling system replacement kit designed for Volvo Penta engines. It is built around a 160 degree F (71 degree C) opening thermostat with an adjustable ring-style controller, and it includes everything needed to complete the job in one purchase: an 18-7170 O-ring, an 18-0398 thermostat gasket, and an 18-3554 component. The thermostat body is finished in bronze, a material choice suited to withstanding the corrosive marine cooling environment.\u003c\/p\u003e\u003cp\u003eThis kit keeps your engine's cooling system operating within its designed temperature range, which protects against overheating and helps the engine run efficiently. Because it ships as a complete kit rather than a bare thermostat, installers avoid the extra step of separately sourcing a matching gasket and O-ring, reducing the chance of a mismatched seal during replacement. Sierra backs the 18-3677 with a limited warranty.\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 18-3677\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Rating:\u003c\/strong\u003e 160 degrees F \/ 71 degrees C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e 18-7170 O-Ring, 18-0398 Thermostat Gasket, 18-3554\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor\/Finish:\u003c\/strong\u003e Bronze\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eController Type:\u003c\/strong\u003e Ring, Adjustable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282146351\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThe Sierra 18-3677 Thermostat Kit is designed for Volvo Penta marine engines. Specific engine models are not specified in available records, so confirm compatibility with your engine's existing thermostat before ordering.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eVOLVO 3856961-2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat temperature does the Sierra 18-3677 thermostat open at?\u003c\/strong\u003e The Sierra 18-3677 Thermostat Kit opens at 160 degrees F (71 degrees C), which regulates coolant flow to keep the engine within its designed operating temperature.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3677 kit include the gasket and O-ring?\u003c\/strong\u003e Yes, the 18-3677 kit is complete and includes an 18-7170 O-ring, an 18-0398 thermostat gasket, and an 18-3554 component, so no separate seals need to be sourced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part does the Sierra 18-3677 replace?\u003c\/strong\u003e This kit is a cross-reference match for Volvo OEM part number 3856961-2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3677 an OEM or aftermarket part?\u003c\/strong\u003e The 18-3677 is a Sierra aftermarket thermostat kit manufactured as a cross-reference replacement for Volvo OEM part 3856961-2, not a Volvo-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engines is the 18-3677 thermostat kit designed for?\u003c\/strong\u003e The Sierra 18-3677 Thermostat Kit is designed for Volvo Penta marine engines; specific engine models are not listed, so match it against your existing thermostat before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3677 thermostat kit weigh?\u003c\/strong\u003e The Sierra 18-3677 Thermostat Kit weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-3677 thermostat housing?\u003c\/strong\u003e The Sierra 18-3677 Thermostat Kit has a bronze finish, a material well suited to marine cooling system environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the thermostat in the 18-3677 kit adjustable?\u003c\/strong\u003e Yes, the 18-3677 uses a ring-style adjustable controller.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-3677 come with a warranty?\u003c\/strong\u003e The Sierra 18-3677 Thermostat Kit is backed by Sierra's limited warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many thermostats are included in the 18-3677 kit?\u003c\/strong\u003e The 18-3677 kit ships as a single-unit count, containing one thermostat along with its matching O-ring and gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3677 Thermostat Kit?\u003c\/strong\u003e The UPC for the Sierra 18-3677 Thermostat Kit is 808282146351.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988161605851,"sku":"SIE-18-3677","price":28.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3677_lg__01087.1558125421.500.750.jpg?v=1785188669","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3677-marine-thermostat-kit-160f-for-volvo-penta-replaces-oem-3856961-3853983-includes-o-ring-gasket","provider":"Good Vibes Marina","version":"1.0","type":"link"}