{"product_id":"thermostat-120-f-50-c-fits-mercury-marine-6-125-hp-outboards-replaces-14586-18-3549","title":"Thermostat (120°F\/50°C) – Fits Mercury Marine 6-125 HP Outboards (Replaces 14586, 18-3549)","description":"\u003c!-- 🔧 Table Styles (include only once per page) --\u003e\n\u003cstyle\u003e\n  \/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n  \/* Base table styles *\/\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n\n  \/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\n  table.ss-table th {\n    white-space:nowrap;       \/* Do not wrap *\/\n    word-break:normal;        \/* Don’t break words *\/\n    letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n    font-weight:600;\n    background:#f8fafc;\n  }\n\n  \/* Small screen optimization *\/\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\n\u003c\/style\u003e\n\u003csection\u003e\n    \u003ch2\u003eProduct Details\u003c\/h2\u003e\n    \u003cp\u003eThis replacement \u003cstrong\u003eThermostat (120°F\/50°C)\u003c\/strong\u003e is designed for a broad range of Mercury Marine 6-125 HP 2-stroke outboards manufactured from 1986 to 2005, including standard, Sea Pro, Marathon, and Super models. It also fits various Johnson\/Evinrude 4-Stroke engines with compatible mounting requirements.\u003c\/p\u003e\n    \u003cp\u003eIt serves as a direct cross-reference for multiple OEM and aftermarket part numbers, including Mercury 14586, Sierra 18-3549, and Johnson\/Evinrude 435491.\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003eInstalls as a direct replacement for the original part.\u003c\/li\u003e\n        \u003cli\u003eConstructed from durable brass with stainless steel components for corrosion resistance.\u003c\/li\u003e\n        \u003cli\u003eManufactured in an ISO9002 certified factory to ensure quality and performance.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n    \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n    \u003cdiv class=\"ss-table-wrap\"\u003e\n      \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\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\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e14586A3\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e75692A9\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e75692A10\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e75692A11\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3549\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e13120\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e13130\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-43014\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eAM\u003c\/td\u003e\n\u003ctd\u003eAM435491\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e435491\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e0435491\u003c\/td\u003e\n\u003c\/tr\u003e\n          \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e0765559\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003c\/tbody\u003e\n      \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n    \u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n    \u003cp\u003eThe following table details compatibility for Mercury Marine outboards. Please verify your engine’s model, horsepower, and serial number range.\u003c\/p\u003e\n    \u003cp\u003eThis thermostat may also fit certain Johnson\/Evinrude 4-stroke engines, but direct model compatibility should be confirmed by a professional technician by cross-referencing part numbers.\u003c\/p\u003e\n    \u003cdiv class=\"ss-table-wrap\"\u003e\n        \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\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\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e2-Stroke Outboards\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1986–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0A197112 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e2-Stroke Outboards\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1986–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0A197112 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e2-Stroke Outboards\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1986–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0A197112 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e2-Stroke Outboards\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1986–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0B292414 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eSea Pro\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1994–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0G044365 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eSuper\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0B238464 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e2-Cylinder\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1986–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0B114231-0T800749\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e2-Cylinder\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1984–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0B114231 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eSea Pro\u003c\/td\u003e\n\u003ctd\u003e25\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0B238464 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e2-Cylinder\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1994–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0G044027-0T598999\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e2-Cylinder\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1994–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0G044027 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e3-Cylinder\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1991–1999\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0D000750-0G589999\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e3-Cylinder\u003c\/td\u003e\n\u003ctd\u003e55\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1991–1999\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0D000750-0G589999\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e3-Cylinder\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1991–1995\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0D000750-0G589999\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e3-Cylinder\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0A996142 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e3-Cylinder\u003c\/td\u003e\n\u003ctd\u003e75\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1990–1996\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0C222000 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e3-Cylinder\u003c\/td\u003e\n\u003ctd\u003e80\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–2005\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0A996142 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e3-Cylinder\u003c\/td\u003e\n\u003ctd\u003e90\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1987–1996\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0A996142 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e4-Cylinder\u003c\/td\u003e\n\u003ctd\u003e100\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988–1996\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0B209468-0G965520\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e4-Cylinder\u003c\/td\u003e\n\u003ctd\u003e115\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1989–1996\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0D283222 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e4-Cylinder\u003c\/td\u003e\n\u003ctd\u003e125\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1989–1996\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eSerial # 0D283222 \u0026amp; Up\u003c\/td\u003e\n\u003c\/tr\u003e\n                \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003eJet\u003c\/td\u003e\n\u003ctd\u003e20-45\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1994–2004\u003c\/td\u003e\n\u003ctd\u003e14586\u003c\/td\u003e\n\u003ctd\u003eMultiple base engines\u003c\/td\u003e\n\u003c\/tr\u003e\n            \u003c\/tbody\u003e\n        \u003c\/table\u003e\n    \u003c\/div\u003e\n\n    \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n    \u003cdl\u003e\n      \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eOutboard Engine Thermostat\u003c\/dd\u003e\n      \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect Replacement\u003c\/dd\u003e\n      \u003cdt\u003eTemperature Rating\u003c\/dt\u003e\n\u003cdd\u003e120°F (48.9°C)\u003c\/dd\u003e\n      \u003cdt\u003eOperating Temperature\u003c\/dt\u003e\n\u003cdd\u003e120°F (48.9°C) opening temperature\u003c\/dd\u003e\n      \u003cdt\u003eMaterial\u003c\/dt\u003e\n\u003cdd\u003eBrass with stainless steel components\u003c\/dd\u003e\n      \u003cdt\u003eHousing Compatibility\u003c\/dt\u003e\n\u003cdd\u003eRequires separate housing assembly (not included)\u003c\/dd\u003e\n      \u003cdt\u003eWeight\u003c\/dt\u003e\n\u003cdd\u003eApprox. 2.08 oz\u003c\/dd\u003e\n      \u003cdt\u003eCertification\u003c\/dt\u003e\n\u003cdd\u003eManufactured in an ISO9002 certified factory\u003c\/dd\u003e\n    \u003c\/dl\u003e\n    \n    \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n    \u003cp\u003eYour package will contain one of the following based on your selection:\u003c\/p\u003e\n    \u003cp\u003e\u003cstrong\u003eWhen purchased as thermostat only (replaces 14586):\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul\u003e\n     \u003cli\u003e1 x Thermostat\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp\u003e\u003cstrong\u003eWhen purchased as kit (replaces 14586A3):\u003c\/strong\u003e\u003c\/p\u003e\n    \u003cul\u003e\n     \u003cli\u003e1 x Thermostat\u003c\/li\u003e\n     \u003cli\u003e1 x Gasket (27-62386)\u003c\/li\u003e\n     \u003cli\u003e1 x Gasket (27-14318-3)\u003c\/li\u003e\n     \u003cli\u003e1 x Gasket (27-19205-1)\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n    \u003col\u003e\n        \u003cli\u003eEnsure the engine is completely cool and disconnect the battery for safety.\u003c\/li\u003e\n        \u003cli\u003eLocate the thermostat housing on the engine. Refer to your service manual if needed.\u003c\/li\u003e\n        \u003cli\u003ePlace a drain pan underneath and carefully remove the bolts securing the housing cover.\u003c\/li\u003e\n        \u003cli\u003eRemove the old thermostat and gasket(s). Note the orientation of the thermostat for correct placement of the new one.\u003c\/li\u003e\n        \u003cli\u003eThoroughly clean the mating surfaces of the housing and its cover, ensuring all old gasket material is removed.\u003c\/li\u003e\n        \u003cli\u003eInstall the new thermostat in the same orientation as the original.\u003c\/li\u003e\n        \u003cli\u003eIf your kit includes new gaskets, place them correctly on the housing.\u003c\/li\u003e\n        \u003cli\u003eRe-attach the housing cover and tighten the bolts to the torque specified by the manufacturer.\u003c\/li\u003e\n        \u003cli\u003eReconnect the battery.\u003c\/li\u003e\n        \u003cli\u003eAfter installation, run the engine and carefully check for any leaks around the thermostat housing. Monitor the temperature gauge to ensure the engine warms up to the correct operating temperature.\u003c\/li\u003e\n    \u003c\/ol\u003e\n    \n    \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eHow do I know if this thermostat is correct for my engine?\u003c\/summary\u003e\n        \u003cp\u003eThe best way is to verify your engine model and serial number against our compatibility table. Cross-referencing your old part number with our Part Number Matrix is also a reliable method. When in doubt, consult a professional marine mechanic.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWhat are the signs of a failing outboard thermostat?\u003c\/summary\u003e\n        \u003cp\u003eCommon symptoms include the engine overheating at idle or low speeds, or taking too long to warm up (running too cool). Inconsistent temperature gauge readings or alarms can also indicate a problem.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eDo I need to replace the gaskets when I replace the thermostat?\u003c\/summary\u003e\n        \u003cp\u003eYes, it is highly recommended to replace the thermostat housing gaskets any time the housing is opened. Old gaskets can become brittle and fail to seal properly, leading to coolant leaks. We offer a kit that includes the necessary gaskets for a complete job.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eHow often should an outboard thermostat be replaced?\u003c\/summary\u003e\n        \u003cp\u003eWhile there is no fixed interval, it is good practice to inspect the thermostat during routine cooling system service (e.g., every 2-3 years or 200-300 hours). Replace it if you notice any signs of corrosion, sticking, or if the engine temperature is not regulating correctly.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n        \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eShipping speed \u0026amp; cost?\u003c\/summary\u003e\n        \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n    \u003c\/details\u003e\n    \u003cdetails\u003e\n        \u003csummary\u003eWarranty \u0026amp; returns?\u003c\/summary\u003e\n        \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n    \u003c\/details\u003e\n\n    \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n        \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n        \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\n    \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50718241718587,"sku":"GH-TH20003-M","price":19.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/GH-TH20003-M.png?v=1762958068","url":"https:\/\/seasierra.com\/products\/thermostat-120-f-50-c-fits-mercury-marine-6-125-hp-outboards-replaces-14586-18-3549","provider":"SeaSierra","version":"1.0","type":"link"}