{"product_id":"18-3524-thermostat-for-yamaha-vz200-v225-vz250-z250-lz250-z300-lz300-f115-lf115","title":"18-3524 Thermostat for Yamaha VZ200 V225 VZ250 Z250 LZ250 Z300 LZ300 F115 LF115 | JLM Marine","description":"\u003ch2\u003eThermostat for Yamaha VZ200 V225 VZ250 Z250 LZ250 Z300 LZ300 F115 LF115 | JLM Marine\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003e50℃ (122°F) thermostat\u003c\/strong\u003e is engineered for Yamaha outboard engines, including \u003cstrong\u003e2-stroke models VZ200, V225, VZ250, Z250, LZ250, Z300, LZ300\u003c\/strong\u003e and \u003cstrong\u003e4-stroke F115, LF115\u003c\/strong\u003e motors. It ensures precise temperature regulation for reliable performance across a wide range of horsepower ratings from 115 HP to 300 HP.\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket replacement directly cross-references \u003cstrong\u003eYamaha OEM part numbers 60V-12411-00-00 and 68V-12411-00-00\u003c\/strong\u003e, as well as \u003cstrong\u003eSierra Marine 18-3524\u003c\/strong\u003e. It offers seamless compatibility with original equipment specifications.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDesigned for both 2-stroke (200–300 HP) and 4-stroke (115 HP) Yamaha outboards\u003c\/li\u003e\n  \u003cli\u003eOperating temperature: \u003cstrong\u003e50℃ \/ 122°F\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eDirect-fit replacement for reliable cooling system performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\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\u003eYamaha\u003c\/td\u003e\n      \u003ctd\u003e60V-12411-00-00\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eYamaha\u003c\/td\u003e\n      \u003ctd\u003e68V-12411-00-00\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eSierra Marine\u003c\/td\u003e\n      \u003ctd\u003e18-3524\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For 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\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\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      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eVZ200\u003c\/td\u003e\n        \u003ctd\u003e200 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2005-09\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eV225\u003c\/td\u003e\n        \u003ctd\u003e225 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2003-09\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eVZ250\u003c\/td\u003e\n        \u003ctd\u003e250 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2003-09\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eZ250\u003c\/td\u003e\n        \u003ctd\u003e250 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2003-05\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eLZ250\u003c\/td\u003e\n        \u003ctd\u003e250 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2003-05\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eVZ300\u003c\/td\u003e\n        \u003ctd\u003e300 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004-09\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eZ300\u003c\/td\u003e\n        \u003ctd\u003e300 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004-06\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eLZ300\u003c\/td\u003e\n        \u003ctd\u003e300 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2004-06\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF115\u003c\/td\u003e\n        \u003ctd\u003e115 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2000-14\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eLF115\u003c\/td\u003e\n        \u003ctd\u003e115 HP\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2000-14\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\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\u003eOperating Temperature\u003c\/td\u003e\n      \u003ctd\u003e50℃ \/ 122°F\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApplication\u003c\/td\u003e\n      \u003ctd\u003eYamaha Outboard Engines\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eComponent Type\u003c\/td\u003e\n      \u003ctd\u003eThermostat\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cp\u003eYour purchase includes the following component:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e1 × 50℃ (122°F) Outboard Thermostat\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and allow the engine to cool completely before beginning work.\u003c\/li\u003e\n  \u003cli\u003eLocate the thermostat housing on your Yamaha outboard engine. Consult your service manual for the exact position.\u003c\/li\u003e\n  \u003cli\u003eDrain the cooling system to prevent coolant spillage during removal.\u003c\/li\u003e\n  \u003cli\u003eRemove the bolts or fasteners securing the thermostat housing cover and carefully lift it off.\u003c\/li\u003e\n  \u003cli\u003eExtract the old thermostat, noting its orientation for correct installation of the new unit.\u003c\/li\u003e\n  \u003cli\u003eClean the mating surfaces of the housing and cover thoroughly, removing all old gasket material and debris.\u003c\/li\u003e\n  \u003cli\u003eInstall the new thermostat in the same orientation as the original, ensuring the temperature-sensing element faces the correct direction.\u003c\/li\u003e\n  \u003cli\u003eApply a new gasket or sealant as specified by the manufacturer to ensure a proper seal.\u003c\/li\u003e\n  \u003cli\u003eReinstall the thermostat housing cover and tighten the bolts evenly to the specified torque.\u003c\/li\u003e\n  \u003cli\u003eRefill the cooling system with the appropriate coolant mixture recommended by Yamaha.\u003c\/li\u003e\n  \u003cli\u003eReconnect the battery and start the engine, checking for leaks around the thermostat housing.\u003c\/li\u003e\n  \u003cli\u003eAllow the engine to reach operating temperature and verify that the cooling system functions properly.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this thermostat fits my Yamaha engine?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your engine model and year with the compatibility table above. You can also verify the OEM part number (60V-12411-00-00 or 68V-12411-00-00) on your existing thermostat or consult the Yamaha parts diagrams linked in the compatibility section.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my thermostat needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: Common symptoms include engine overheating, failure to reach normal operating temperature, erratic temperature gauge readings, or visible corrosion and buildup on the thermostat. If your cooling system is malfunctioning, the thermostat is a frequent culprit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the thermostat on my outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Yamaha recommends inspecting the thermostat during routine maintenance intervals (typically every 100 hours or annually). Replace it if you notice corrosion, mineral deposits, or if the engine exhibits temperature regulation issues.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I install this thermostat myself, or do I need a professional?\u003c\/strong\u003e\u003cbr\u003e\nA: If you have mechanical experience and the proper tools, installation is straightforward following the steps in this guide. However, professional installation is recommended to ensure correct torque settings, gasket sealing, and cooling system refill procedures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM part or an aftermarket replacement?\u003c\/strong\u003e\u003cbr\u003e\nA: This 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\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We 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\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This 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\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\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":49540377903417,"sku":"23TH627","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/Outboard_Thermostat_for_Yamaha_2_Stroke_100-300_HP_60V-12411_-_JLM_MARINE-8286970.jpg?v=1755742203","url":"https:\/\/jlmmarine.com\/products\/18-3524-thermostat-for-yamaha-vz200-v225-vz250-z250-lz250-z300-lz300-f115-lf115","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}