{"product_id":"thermostat-gasket-for-mercruiser-3-0l-2-5l-4-6-cyl-140-120hp-59078t3-18-3650","title":"Thermostat \u0026 Gasket for MerCruiser 3.0L 2.5L 4, 6 Cyl 140, 120HP 59078T3 18-3650","description":"\u003ch2\u003eThermostat \u0026amp; Gasket for MerCruiser\u003c\/h2\u003e\u003cp\u003eThis thermostat and gasket set is designed for MerCruiser marine engines, ensuring optimal engine temperature regulation for 3.0L, 2.5L, 4-cylinder, and 6-cylinder models including 140HP and 120HP, with OEM cross-reference numbers 59078T3 and 18-3650.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis thermostat and gasket for MerCruiser provides reliable cooling system performance by maintaining proper operating temperature. It is essential for marine engines running 3.0L or 2.5L displacements in 4 or 6 cylinder configurations. Whether you have a 140HP or 120HP MerCruiser, this thermostat and gasket set ensures consistent engine temperature for optimal performance.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement for MerCruiser 59078T3 and 18-3650 part numbers\u003c\/li\u003e\n\u003cli\u003eIncludes both thermostat and gasket for complete installation\u003c\/li\u003e\n\u003cli\u003eDesigned for saltwater and freshwater marine environments\u003c\/li\u003e\n\u003cli\u003eConstructed from corrosion-resistant materials\u003c\/li\u003e\n\u003cli\u003ePrecision temperature control for engine efficiency\u003c\/li\u003e\n\u003cli\u003eEasy bolt-on installation with no modifications required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor MerCruiser 3.0L 4-cylinder engines\u003c\/li\u003e\n\u003cli\u003efor MerCruiser 2.5L 4-cylinder engines\u003c\/li\u003e\n\u003cli\u003efor MerCruiser 4-cylinder 140HP models\u003c\/li\u003e\n\u003cli\u003efor MerCruiser 6-cylinder 120HP models\u003c\/li\u003e\n\u003cli\u003efor MerCruiser 3.0L and 2.5L sterndrive and inboard applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eReplacing worn or failed thermostats in MerCruiser marine engines\u003c\/li\u003e\n\u003cli\u003eRestoring proper engine operating temperature for better fuel efficiency\u003c\/li\u003e\n\u003cli\u003ePreventing overheating during extended cruising or high-RPM operation\u003c\/li\u003e\n\u003cli\u003eMaintaining consistent cooling in both fresh and saltwater conditions\u003c\/li\u003e\n\u003cli\u003eRoutine maintenance during engine rebuild or cooling system overhaul\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e59078T3, 18-3650\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.0L, 2.5L, 4 \u0026amp; 6 Cyl, 140HP, 120HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThermostat \u0026amp; Gasket Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBrass and rubber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this thermostat come pre-gasketed? \u003cstrong\u003eA:\u003c\/strong\u003e The gasket is included as a separate item; you will need to install it during assembly. Ensure the mating surfaces are clean for a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this work on a MerCruiser 3.0LX? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, the 3.0LX uses the same thermostat and gasket as the standard 3.0L. Confirm your engine serial number to be certain.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":44957609099350,"sku":"ZZ2Y01403","price":63.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/57_76cc59e1-43e7-4dfa-b7cc-35c48e7556fe.jpg?v=1781569601","url":"https:\/\/www.solidspare.com\/products\/thermostat-gasket-for-mercruiser-3-0l-2-5l-4-6-cyl-140-120hp-59078t3-18-3650","provider":"Solid Spare","version":"1.0","type":"link"}