{"product_id":"thermostat-60c-140f-fits-honda-mercury-yamaha-8-255-hp-replaces-19300-zy3-023-19300-zw9-003","title":"Thermostat (60°C\/140°F) – Fits Honda, Mercury, Yamaha 8-255 HP (Replaces 19300-ZY3-023, 19300-ZW9-003)","description":"\u003ch2\u003eThermostat (60°C\/140°F) – Fits Honda, Mercury, \u0026amp; Yamaha 4-Stroke Outboards\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket thermostat is a high-quality replacement for a wide range of Honda, Mercury, and Yamaha 4-stroke outboard engines. It is engineered to meet or exceed OEM specifications, ensuring reliable engine temperature regulation for optimal performance and longevity. This part is designed for Honda 8-225 HP (2001-Present), Mercury 15-90 HP, and Yamaha 9.9-70 HP (1987-Present) models.\u003c\/p\u003e\n\u003cp\u003eThis component is a direct replacement for numerous Honda, Mercury, Yamaha, and Sierra part numbers, making it a versatile and reliable choice for maintenance and repair.\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e Opens at a factory-set \u003cstrong\u003e60°C (140°F)\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation Type:\u003c\/strong\u003e Direct replacement for the original OEM thermostat.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Built with an OEM-grade brass and rubber composite for durability and corrosion resistance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n    \u003ctable\u003e\n        \u003cthead\u003e\n            \u003ctr\u003e\n                \u003cth\u003eBrand\u003c\/th\u003e\n                \u003cth\u003ePart Number\u003c\/th\u003e\n            \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023, 19300-ZW9-003\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eYamaha\u003c\/td\u003e\n                \u003ctd\u003e6G8-12411-00-00, 6G8-12411-01-00, 6G8-12411-02-00, 6G8-12411-03-00, 66M-12411-00-00, 66M-12411-01-00\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eMercury\u003c\/td\u003e\n                \u003ctd\u003e825212, 825212001, 825212T02, 855676, 855676003, 855676A1\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eSierra\u003c\/td\u003e\n                \u003ctd\u003e18-3541\u003c\/td\u003e\n            \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n\u003cp\u003eFor Mercury owners, here’s a guide to help you identify your engine’s serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/mercury-outboard-serial-number-guide\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/diagrams\/mercury-parts-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eMercury Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eFor Yamaha owners, here’s a guide to help you identify your engine’s serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-serial-number-guide-2025\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-parts-diagrams-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eHonda\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n    \u003ctable\u003e\n        \u003cthead\u003e\n            \u003ctr\u003e\n                \u003cth\u003eBrand\u003c\/th\u003e\n                \u003cth\u003eModel\u003c\/th\u003e\n                \u003cth\u003eRated HP\u003c\/th\u003e\n                \u003cth\u003eStroke\u003c\/th\u003e\n                \u003cth\u003eYears\u003c\/th\u003e\n                \u003cth\u003eOEM Part No.\u003c\/th\u003e\n            \u003c\/tr\u003e\n        \u003c\/thead\u003e\n        \u003ctbody\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF8\u003c\/td\u003e\n                \u003ctd\u003e8\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZW9-003\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF9.9\u003c\/td\u003e\n                \u003ctd\u003e9.9\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZW9-003\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF15\u003c\/td\u003e\n                \u003ctd\u003e15\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZW9-003\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF20\u003c\/td\u003e\n                \u003ctd\u003e20\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZW9-003\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF25\u003c\/td\u003e\n                \u003ctd\u003e25\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZW9-003\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF30\u003c\/td\u003e\n                \u003ctd\u003e30\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZW9-003\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF40\u003c\/td\u003e\n                \u003ctd\u003e40\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZW9-003\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF50\u003c\/td\u003e\n                \u003ctd\u003e50\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZW9-003\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF60\u003c\/td\u003e\n                \u003ctd\u003e60\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZW9-003\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF75\u003c\/td\u003e\n                \u003ctd\u003e75\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF80\u003c\/td\u003e\n                \u003ctd\u003e80\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF90\u003c\/td\u003e\n                \u003ctd\u003e90\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF100\u003c\/td\u003e\n                \u003ctd\u003e100\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF115\u003c\/td\u003e\n                \u003ctd\u003e115\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF130\u003c\/td\u003e\n                \u003ctd\u003e130\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF135\u003c\/td\u003e\n                \u003ctd\u003e135\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF150\u003c\/td\u003e\n                \u003ctd\u003e150\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF175\u003c\/td\u003e\n                \u003ctd\u003e175\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF200\u003c\/td\u003e\n                \u003ctd\u003e200\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd\u003eHonda\u003c\/td\u003e\n                \u003ctd\u003eBF225\u003c\/td\u003e\n                \u003ctd\u003e225\u003c\/td\u003e\n                \u003ctd\u003e4-Stroke\u003c\/td\u003e\n                \u003ctd\u003e2001+\u003c\/td\u003e\n                \u003ctd\u003e19300-ZY3-023\u003c\/td\u003e\n            \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eMercury\u003c\/h3\u003e\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eBrand\u003c\/th\u003e\n            \u003cth\u003eModel\u003c\/th\u003e\n            \u003cth\u003eRated HP\u003c\/th\u003e\n            \u003cth\u003eStroke\u003c\/th\u003e\n            \u003cth\u003eOEM Part No.\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e825212, 855676\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e75\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e825212, 855676\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eMercury\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e90\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e825212, 855676\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eYamaha\u003c\/h3\u003e\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eBrand\u003c\/th\u003e\n            \u003cth\u003eModel\u003c\/th\u003e\n            \u003cth\u003eRated HP\u003c\/th\u003e\n            \u003cth\u003eStroke\u003c\/th\u003e\n            \u003cth\u003eYears\u003c\/th\u003e\n            \u003cth\u003eOEM Part No.\u003c\/th\u003e\n            \u003cth\u003eNotes\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e9.9\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1987+\u003c\/td\u003e\n            \u003ctd\u003e6G8-12411-00-00\u003c\/td\u003e\n            \u003ctd\u003eMultiple supersessions\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e15\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1987+\u003c\/td\u003e\n            \u003ctd\u003e6G8-12411-00-00\u003c\/td\u003e\n            \u003ctd\u003eMultiple supersessions\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e20\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1987+\u003c\/td\u003e\n            \u003ctd\u003e6G8-12411-00-00\u003c\/td\u003e\n            \u003ctd\u003eMultiple supersessions\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e25\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1987+\u003c\/td\u003e\n            \u003ctd\u003e6G8-12411-00-00\u003c\/td\u003e\n            \u003ctd\u003eMultiple supersessions\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e30\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1987+\u003c\/td\u003e\n            \u003ctd\u003e6G8-12411-00-00\u003c\/td\u003e\n            \u003ctd\u003eMultiple supersessions\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e40\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1987+\u003c\/td\u003e\n            \u003ctd\u003e6G8-12411-00-00\u003c\/td\u003e\n            \u003ctd\u003eMultiple supersessions\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e50\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1987+\u003c\/td\u003e\n            \u003ctd\u003e6G8-12411-00-00\u003c\/td\u003e\n            \u003ctd\u003eMultiple supersessions\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e60\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1987+\u003c\/td\u003e\n            \u003ctd\u003e6G8-12411-00-00\u003c\/td\u003e\n            \u003ctd\u003eMultiple supersessions\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eVarious Models\u003c\/td\u003e\n            \u003ctd\u003e70\u003c\/td\u003e\n            \u003ctd\u003e4-Stroke\u003c\/td\u003e\n            \u003ctd\u003e1987+\u003c\/td\u003e\n            \u003ctd\u003e6G8-12411-00-00\u003c\/td\u003e\n            \u003ctd\u003eMultiple supersessions\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eSpecification\u003c\/th\u003e\n            \u003cth\u003eValue\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eProduct Type\u003c\/td\u003e\n            \u003ctd\u003eMarine Engine Thermostat\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eInstallation\u003c\/td\u003e\n            \u003ctd\u003eDirect OEM Replacement\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eTemperature Rating\u003c\/td\u003e\n            \u003ctd\u003e\u003cstrong\u003e60°C (140°F) Opening Temperature\u003c\/strong\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eHousing Material\u003c\/td\u003e\n            \u003ctd\u003eOEM-grade brass and rubber composite\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOperating Temperature\u003c\/td\u003e\n            \u003ctd\u003e60°C (140°F) Opening Temperature\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eOther Technical Attributes\u003c\/td\u003e\n            \u003ctd\u003eAftermarket replacement with OEM-equivalent construction\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cp\u003e1 x Thermostat Assembly (\u003cspan style=\"color:red;\"\u003e60°C\/140°F rating\u003c\/span\u003e)\u003c\/p\u003e\n\n\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\u003col\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSafety First:\u003c\/strong\u003e Ensure the engine is completely cool and disconnected from the power source before beginning.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLocate Thermostat Housing:\u003c\/strong\u003e Find the thermostat housing on the engine block, typically near the top of the cylinder head where the main coolant hose connects.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDrain Coolant:\u003c\/strong\u003e Place a suitable container underneath and drain enough coolant to bring the level below the thermostat housing. This prevents spills.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRemove Housing Cover:\u003c\/strong\u003e Loosen and remove the bolts holding the thermostat housing cover in place. Take note of their placement for easier reassembly.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eExtract Old Thermostat:\u003c\/strong\u003e Carefully lift out the old thermostat and its gasket or seal. Thoroughly clean any old gasket material or corrosion from both the housing and cover surfaces.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstall New Thermostat:\u003c\/strong\u003e Position the new thermostat assembly in the housing, ensuring it is correctly oriented. The integrated seal should sit flush.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRe-secure Cover:\u003c\/strong\u003e Replace the housing cover and tighten the bolts evenly in a crisscross pattern to the manufacturer's specified torque.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRefill Coolant:\u003c\/strong\u003e Top off the cooling system with the manufacturer-recommended coolant.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCheck for Leaks:\u003c\/strong\u003e Start the engine and let it warm up, carefully inspecting the thermostat housing for any signs of coolant leaks.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I confirm this thermostat fits my specific engine model?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCheck the \"Compatible Engine Models\" and \"Part Number Cross-Reference\" tables on this page. It is crucial to match your engine's brand, model, HP, and year with the provided data. For Mercury and Yamaha engines, we’ve included links to serial number guides and parts catalogs to help you verify the correct OEM part number.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the common signs of a failing thermostat?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCommon signs include the engine overheating, the engine taking too long to reach its normal operating temperature, or erratic temperature gauge readings. A thermostat stuck open will prevent the engine from warming up properly, while one stuck closed will cause it to overheat.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this thermostat require a separate gasket?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis thermostat is a complete assembly that includes an integrated rubber seal, just like the OEM version. No separate gasket is typically required. However, you should always inspect the mating surfaces of the housing for flatness and damage before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM vs. Aftermarket?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow fast do you ship and how much does it cost?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is your warranty and return policy?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n    \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":50567725121849,"sku":"20TH001","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Thermostat_for_Honda_8-255HP_Mercury_15-90HP_Yamaha_99-70HP_3852215_-_JLM_MARINE-8290872.jpg?v=1755251687","url":"https:\/\/jlmmarine.com\/products\/thermostat-60c-140f-fits-honda-mercury-yamaha-8-255-hp-replaces-19300-zy3-023-19300-zw9-003","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}