{"product_id":"thermostat-fits-yamaha-150-200hp-outboards-replaces-6da-12411-01-00-6da-12411-00-00","title":"Thermostat – Fits Yamaha 150-200HP Outboards (Replaces 6DA-12411-01-00, 6DA-12411-00-00)","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 \u003cstrong\u003eThermostat – Fits Yamaha 150HP, 175HP, 200HP Outboards\u003c\/strong\u003e is engineered for Yamaha 4-Stroke 150–200 HP outboard motors from approximately 2012–2018, including F150, F175, F200, VF150, and VF175 series engines. It is a critical component that ensures your engine maintains the correct operating temperature for optimal performance, longevity, and fuel efficiency.\u003c\/p\u003e\n  \u003cp\u003eThis part serves as a direct cross-reference for Yamaha part numbers 6DA-12411-01-00 and 6DA-12411-00-00, and interchanges with Sierra 18-3636.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eDesigned for a direct, OEM-equivalent installation.\u003c\/li\u003e\n    \u003cli\u003eFeatures a high-grade, corrosion-resistant housing for durability in harsh marine environments.\u003c\/li\u003e\n    \u003cli\u003eMaintains a precise operating temperature of 60°C (140°F) as per factory specifications.\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        \u003cth\u003eSuperseded By\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\u003e6DA-12411-01-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eCurrent Part Number\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6DA-12411-00-00\u003c\/td\u003e\n        \u003ctd\u003e6DA-12411-01-00\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3636\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eAftermarket Interchange\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\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\u003eThis thermostat is specifically designed for select Yamaha 4-Stroke outboard models.\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        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003eF150C, LF150C\u003c\/td\u003e\n          \u003ctd\u003e150\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2017\u003c\/td\u003e\n          \u003ctd\u003e6DA-12411-01-00, 6DA-12411-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003eVF150\u003c\/td\u003e\n          \u003ctd\u003e150\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2013–2017\u003c\/td\u003e\n          \u003ctd\u003e6DA-12411-01-00, 6DA-12411-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003eVF150A\u003c\/td\u003e\n          \u003ctd\u003e150\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2018\u003c\/td\u003e\n          \u003ctd\u003e6DA-12411-01-00, 6DA-12411-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003eF175C, LF175C\u003c\/td\u003e\n          \u003ctd\u003e175\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2017\u003c\/td\u003e\n          \u003ctd\u003e6DA-12411-01-00, 6DA-12411-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003eF175A\u003c\/td\u003e\n          \u003ctd\u003e175\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2014–2018\u003c\/td\u003e\n          \u003ctd\u003e6DA-12411-01-00, 6DA-12411-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003eVF175\u003c\/td\u003e\n          \u003ctd\u003e175\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2015–2018\u003c\/td\u003e\n          \u003ctd\u003e6DA-12411-01-00, 6DA-12411-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003eF200B, LF200B\u003c\/td\u003e\n          \u003ctd\u003e200\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2012–2018\u003c\/td\u003e\n          \u003ctd\u003e6DA-12411-01-00, 6DA-12411-00-00\u003c\/td\u003e\n        \u003c\/tr\u003e\n          \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003eF200C, LF200C\u003c\/td\u003e\n          \u003ctd\u003e200\u003c\/td\u003e\n          \u003ctd\u003e4-Stroke\u003c\/td\u003e\n          \u003ctd\u003e2013–2018\u003c\/td\u003e\n          \u003ctd\u003e6DA-12411-01-00, 6DA-12411-00-00\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\u003eThermostat\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect OEM replacement\u003c\/dd\u003e\n    \u003cdt\u003eHousing Material\u003c\/dt\u003e\n\u003cdd\u003eHigh-grade corrosion-resistant housing\u003c\/dd\u003e\n    \u003cdt\u003eOperating Temperature\u003c\/dt\u003e\n\u003cdd\u003e60°C (140°F)\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eLocated in engine cooling system\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Thermostat (Replaces 6DA-12411-01-00)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003cp\u003eReplacing the thermostat is a standard maintenance task. Always consult your engine's service manual for detailed instructions. The general steps are:\u003c\/p\u003e\n  \u003col\u003e\n    \u003cli\u003eEnsure the engine is off and cool. Disconnect the battery.\u003c\/li\u003e\n    \u003cli\u003eLocate the thermostat housing on the engine block or cylinder head.\u003c\/li\u003e\n    \u003cli\u003ePlace a drain pan underneath and remove the housing cover bolts.\u003c\/li\u003e\n    \u003cli\u003eCarefully remove the old thermostat and gasket. Note its orientation.\u003c\/li\u003e\n    \u003cli\u003eClean the housing and cover mating surfaces thoroughly, removing all old gasket material.\u003c\/li\u003e\n    \u003cli\u003eInstall the new thermostat in the same orientation as the original.\u003c\/li\u003e\n    \u003cli\u003eFit a new gasket (not included) onto the housing.\u003c\/li\u003e\n    \u003cli\u003eReinstall the housing cover and tighten the bolts to the manufacturer's specified torque.\u003c\/li\u003e\n    \u003cli\u003eReconnect all hoses, refill the cooling system, and reconnect the battery.\u003c\/li\u003e\n    \u003cli\u003eStart the engine and carefully check for any leaks as it warms up.\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 fits my Yamaha engine?\u003c\/summary\u003e\n    \u003cp\u003eThe most reliable method is to match your engine's model and year to the compatibility table. Also, verify that your old part number matches one of the references (6DA-12411-01-00, 6DA-12411-00-00, or Sierra 18-3636).\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the signs of a faulty thermostat?\u003c\/summary\u003e\n    \u003cp\u003eA thermostat can fail \"open\" or \"closed.\" If it fails open, the engine will run too cool, leading to poor fuel economy and carbon buildup. If it fails closed, the engine will overheat, which can cause severe damage. An engine alarm or erratic temperature gauge readings are key indicators.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs a gasket included with this thermostat?\u003c\/summary\u003e\n    \u003cp\u003eNo, this listing is for the thermostat only. It is strongly recommended to use a new gasket during installation to ensure a proper seal and prevent leaks. Gaskets are sold separately.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I replace my outboard's thermostat?\u003c\/summary\u003es\n    \u003cp\u003eThermostats are a routine maintenance item. For engines used in saltwater, it's a good practice to inspect or replace them every 1-2 years (or 200-300 hours) to prevent them from seizing due to corrosion. Refer to your owner's manual for specific service intervals.\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":50723781607739,"sku":"21TH026","price":29.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Thermostat_for_Yamaha_150_175_200_HP_6DA-12411-01-00_6DA-12411-00_6DA-12411-01_-_JLM_MARINE-8290980.jpg?v=1763031645","url":"https:\/\/seasierra.com\/products\/thermostat-fits-yamaha-150-200hp-outboards-replaces-6da-12411-01-00-6da-12411-00-00","provider":"SeaSierra","version":"1.0","type":"link"}