{"title":"Yamaha Marine 4-Stroke Outboard Thermostats","description":"\u003cp\u003eA thermostat is a valve in the outboard's cooling system that opens or closes depending on temperature. When the thermostat is closed, it prevents the flow of cooling water passing through the outboard, thus increasing the motor's operating temperature.\u003c\/p\u003e\n\u003cp\u003eA thermostat regulates the temperature of the water for engine cooling and keeps pressure in the cooling system to facilitate heat transfer from the heads and the cylinder walls. Today’s emission regulations make the thermostat even more important for correct engine operation and depending how the laws are interpreted, may put you in violation by removing it or substituting one with a different rating. Today's low-emission computer-controlled marine powerplants are dependent on thorough combustion for reduced exhaust emissions. That is made possible by having the proper engine temperatures and fuel mixtures. As the temperature rises, the thermostat opens and allows coolant to flow through the outboard, thus decreasing its operating temperature. By constantly opening and closing, the thermostat keeps the motor at its ideal operating temperature. Boat thermostats are an integral part of your marine engine and should not be overlooked when completing your routine maintenance. These devices regulate the temperature of the water used in cooling your boat’s engine. They also help to maintain the correct pressure in the cooling system so that heat will transfer from the engine heads to the cylinder walls. When the thermostat is closed, air can not be passed through the engine, causing the temperature to rise. Once the temperature rises, the thermostat opens to allow the coolant to flow to the outboard. This is a continual cycle and often boat thermostats will need to be replaced. Not maintaining both of these components can cause costly damage and repair. Make sure to routinely check and replace your marine thermostat. One of the least appreciated components of an outboard motor is the lowly thermostat. ... That is made possible by having the proper engine temperatures and fuel mixtures. The brain of a thermostat is a component called a vernatherm that is fastened inside the thermostat housing. Overheating can also be caused by a worn or damaged water pump impeller. ... If the impeller is damaged and is missing a vane, make sure any displaced pieces are accounted for and removed. Any debris left in the water passages may reduce flow, which leads to persistent overheating. The brain of a thermostat is a component called a vernatherm that is fastened inside the thermostat housing. Shown on left side of the illustration, this device has a piston that moves upward to open the thermostat valve at a pre-determined temperature. The vernatherm consists of brass housing with an internal chamber containing a mixture formulated to expand at a pre-determined temperature. A piston fits into the chamber sealed with a rubber diaphragm. As the waxy mixture expands from water heating up, it pushes upward on the piston attached to the bottom of the thermostat valve. This motion (about 1\/8”) lifts the valve off its seat allowing hot water to flow through the open valve to exit the engine block.\u003c\/p\u003e\n\u003cp\u003eKeep your Yamaha 4-Stroke outboard motor running smooth and cool by replacing your thermostat with a genuine Yamaha Marine 4-Stroke Outboard Thermostat.\u003c\/p\u003e","products":[{"product_id":"yamaha-thermostat-67f-12411-01-00-f75-f90-f150-f200-f225-f250","title":"Yamaha - Thermostat - 67F-12411-01-00 - F75 F90 F150 F200 F225 F250","description":"\u003ch2\u003eYamaha Thermostat 67F-12411-01-00\u003c\/h2\u003e\n\u003cp\u003eShop Yamaha Thermostat 67F-12411-01-00 for compatible Yamaha outboard applications, including select F75, F90, F150, F200, F225, and F250 models.\u003c\/p\u003e\n\u003cp\u003eA Yamaha outboard thermostat helps regulate engine temperature by controlling coolant water flow through the engine. When the thermostat opens and closes properly, the engine can warm up correctly and maintain a more consistent operating temperature during use.\u003c\/p\u003e\n\u003cp\u003eYamaha 67F-12411-01-00 is an OEM Yamaha thermostat part number. The safest way to confirm fitment is to match the full part number, Yamaha outboard model, horsepower, serial-number range, and parts diagram before purchasing.\u003c\/p\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct name:\u003c\/strong\u003e Yamaha Thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM part number:\u003c\/strong\u003e 67F-12411-01-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Yamaha outboard thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Yamaha\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Cooling system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Compatible Yamaha outboards where 67F-12411-01-00 is specified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon model references:\u003c\/strong\u003e Select Yamaha F75, F90, F150, F200, F225, and F250 outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSearch variants:\u003c\/strong\u003e 67F 12411 01 00, 67F-12411-01-00, Yamaha thermostat, Yamaha outboard thermostat, Yamaha F150 thermostat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat Yamaha 67F-12411-01-00 Is Used For\u003c\/h3\u003e\n\u003cp\u003eYamaha 67F-12411-01-00 is a genuine Yamaha thermostat used in compatible Yamaha outboard cooling systems. The thermostat helps control engine temperature by regulating when cooling water flows through the engine.\u003c\/p\u003e\n\u003cp\u003eUse this Yamaha thermostat when your parts diagram or Yamaha service guidance specifies 67F-12411-01-00 for the cooling-system service:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe engine is running too cool\u003c\/li\u003e\n\u003cli\u003eThe engine is running hotter than normal\u003c\/li\u003e\n\u003cli\u003eThe thermostat is stuck open or closed\u003c\/li\u003e\n\u003cli\u003eThe engine has inconsistent operating temperature\u003c\/li\u003e\n\u003cli\u003eCooling-system service is being performed\u003c\/li\u003e\n\u003cli\u003eThe existing thermostat is corroded or worn\u003c\/li\u003e\n\u003cli\u003eA Yamaha parts diagram lists 67F-12411-01-00\u003c\/li\u003e\n\u003cli\u003eThe existing thermostat part number matches 67F-12411-01-00\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBecause Yamaha cooling-system parts can vary by model, production range, and engine configuration, part-number confirmation is important before ordering.\u003c\/p\u003e\n\u003ch3\u003eWhy the Yamaha Thermostat Matters\u003c\/h3\u003e\n\u003cp\u003eThe thermostat is a small cooling-system part, but it plays an important role in engine temperature control. A properly working thermostat helps the engine warm up, maintain the right operating range, and avoid temperature swings that can affect performance.\u003c\/p\u003e\n\u003cp\u003eA worn, stuck, or failed Yamaha thermostat can contribute to:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngine overheating\u003c\/li\u003e\n\u003cli\u003eEngine running too cool\u003c\/li\u003e\n\u003cli\u003eRough running during warm-up\u003c\/li\u003e\n\u003cli\u003ePoor idle quality\u003c\/li\u003e\n\u003cli\u003eReduced fuel efficiency\u003c\/li\u003e\n\u003cli\u003eInconsistent temperature readings\u003c\/li\u003e\n\u003cli\u003eOverheat warnings\u003c\/li\u003e\n\u003cli\u003eCooling-system performance issues\u003c\/li\u003e\n\u003cli\u003eLong-term engine wear if ignored\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eReplacing a faulty thermostat during cooling-system service helps support smoother and more reliable Yamaha outboard operation.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision temperature regulation\u003c\/strong\u003e – opens and closes at the correct temperature to maintain proper engine operating conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Yamaha OEM component\u003c\/strong\u003e – manufactured to Yamaha specifications for correct fit and dependable cooling-system performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupports efficient engine operation\u003c\/strong\u003e – helps maintain optimal combustion efficiency and fuel economy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect service replacement\u003c\/strong\u003e – designed for straightforward installation during cooling-system maintenance or thermostat service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart-number-specific fitment\u003c\/strong\u003e – supports accurate ordering when 67F-12411-01-00 is listed for your engine\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngine and Boat Compatibility\u003c\/h3\u003e\n\u003cp\u003eThis Yamaha thermostat is commonly associated with select Yamaha outboard models listed for this product.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eF75 - 2005-Current\u003c\/li\u003e\n\u003cli\u003eF80 - All Models\u003c\/li\u003e\n\u003cli\u003eF90 - 2005-Current\u003c\/li\u003e\n\u003cli\u003eF100 - 2001 and newer\u003c\/li\u003e\n\u003cli\u003eF150 - 2005-Current\u003c\/li\u003e\n\u003cli\u003eF200 - 2005-Current\u003c\/li\u003e\n\u003cli\u003eF225 - 2005-Current\u003c\/li\u003e\n\u003cli\u003eF250 - 2005-Current\u003c\/li\u003e\n\u003cli\u003eFL150 - 2010\u003c\/li\u003e\n\u003cli\u003eLF150 - 2005-Current\u003c\/li\u003e\n\u003cli\u003eLF200 - 2005-Current\u003c\/li\u003e\n\u003cli\u003eLF225 - 2005-Current\u003c\/li\u003e\n\u003cli\u003eLF250 - 2005-Current\u003c\/li\u003e\n\u003cli\u003eVF200 - 2009-2010\u003c\/li\u003e\n\u003cli\u003eVF225 - 2009-2010\u003c\/li\u003e\n\u003cli\u003eVF250 - 2009-2010\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAlways verify your specific model for fitment.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eHow to Confirm This Yamaha Thermostat Fits\u003c\/h3\u003e\n\u003cp\u003eConfirm fitment before ordering Yamaha Thermostat 67F-12411-01-00. Thermostats can vary by Yamaha outboard model, horsepower, serial-number range, and cooling-system design.\u003c\/p\u003e\n\u003cp\u003eBefore buying, check:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYamaha outboard model\u003c\/li\u003e\n\u003cli\u003eEngine horsepower\u003c\/li\u003e\n\u003cli\u003eSerial number or production range\u003c\/li\u003e\n\u003cli\u003eExisting thermostat part number\u003c\/li\u003e\n\u003cli\u003eYamaha parts diagram\u003c\/li\u003e\n\u003cli\u003eOwner’s manual or service manual\u003c\/li\u003e\n\u003cli\u003eWhether 67F-12411-01-00 is listed for your engine\u003c\/li\u003e\n\u003cli\u003eWhether thermostat gaskets, seals, or covers are also needed\u003c\/li\u003e\n\u003cli\u003eWhether the cooling issue may involve the water pump, poppet valve, or temperature sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf your parts diagram or existing thermostat lists 67F-12411-01-00, this is the correct product page to review.\u003c\/p\u003e\n\u003ch3\u003eCommon Yamaha Model References\u003c\/h3\u003e\n\u003cp\u003eThis Yamaha thermostat is commonly associated with select Yamaha outboard models listed for this product.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYamaha F75\u003c\/li\u003e\n\u003cli\u003eYamaha F90\u003c\/li\u003e\n\u003cli\u003eYamaha F150\u003c\/li\u003e\n\u003cli\u003eYamaha F200\u003c\/li\u003e\n\u003cli\u003eYamaha F225\u003c\/li\u003e\n\u003cli\u003eYamaha F250\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways confirm final compatibility by checking the specific model, serial-number range, and Yamaha parts diagram before ordering.\u003c\/p\u003e\n\u003ch3\u003eWhen to Replace a Yamaha Outboard Thermostat\u003c\/h3\u003e\n\u003cp\u003eReplace a Yamaha outboard thermostat when it is stuck, corroded, damaged, no longer regulating temperature correctly, or recommended for replacement during cooling-system service.\u003c\/p\u003e\n\u003cp\u003eCommon reasons to inspect or replace the thermostat include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEngine overheating\u003c\/li\u003e\n\u003cli\u003eEngine running colder than expected\u003c\/li\u003e\n\u003cli\u003eInconsistent temperature readings\u003c\/li\u003e\n\u003cli\u003eOverheat alarm\u003c\/li\u003e\n\u003cli\u003ePoor warm-up behavior\u003c\/li\u003e\n\u003cli\u003eCorrosion around the thermostat\u003c\/li\u003e\n\u003cli\u003eSalt, scale, or debris buildup\u003c\/li\u003e\n\u003cli\u003eCooling-system maintenance\u003c\/li\u003e\n\u003cli\u003eUnknown service history\u003c\/li\u003e\n\u003cli\u003eThermostat housing already removed for inspection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf an engine overheats, inspect the full cooling system before assuming the thermostat is the only problem.\u003c\/p\u003e\n\u003ch3\u003eYamaha Thermostat vs. Water Pump Issue\u003c\/h3\u003e\n\u003cp\u003eA thermostat problem and a water pump problem can both affect engine temperature, but they are different cooling-system issues.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermostat issue:\u003c\/strong\u003e may cause the engine to run too hot, too cool, or inconsistently because the thermostat is not opening or closing correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater pump issue:\u003c\/strong\u003e may cause weak telltale flow, reduced cooling-water circulation, overheating, or poor water pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoppet valve issue:\u003c\/strong\u003e may affect water pressure regulation in some Yamaha cooling systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor issue:\u003c\/strong\u003e may cause inaccurate temperature readings or warnings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf the engine is overheating, check the thermostat, water pump, impeller, cooling passages, poppet valve, and temperature sensors as needed.\u003c\/p\u003e\n\u003ch3\u003eWhat to Order With Yamaha 67F-12411-01-00\u003c\/h3\u003e\n\u003cp\u003eWhen replacing a Yamaha thermostat, inspect related cooling-system parts and gather all required service items before starting.\u003c\/p\u003e\n\u003cp\u003eRelated parts to verify in the diagram include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThermostat gasket\u003c\/li\u003e\n\u003cli\u003eThermostat cover gasket\u003c\/li\u003e\n\u003cli\u003eO-ring or seal, where applicable\u003c\/li\u003e\n\u003cli\u003eThermostat cover hardware\u003c\/li\u003e\n\u003cli\u003eWater pump repair kit\u003c\/li\u003e\n\u003cli\u003eImpeller\u003c\/li\u003e\n\u003cli\u003ePoppet valve components\u003c\/li\u003e\n\u003cli\u003eTemperature sensor, if diagnosis points to it\u003c\/li\u003e\n\u003cli\u003eMarine grease or anti-corrosion products\u003c\/li\u003e\n\u003cli\u003eReplacement bolts, if old hardware is corroded\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDo not reuse damaged gaskets or seals if the service procedure calls for replacement.\u003c\/p\u003e\n\u003ch3\u003eBasic Yamaha Thermostat Replacement Considerations\u003c\/h3\u003e\n\u003cp\u003eAlways follow the Yamaha service manual for your exact outboard model. Thermostat location, cover design, gasket type, and torque specifications can vary by engine.\u003c\/p\u003e\n\u003cp\u003eBasic process:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eTurn off the engine and allow it to cool completely.\u003c\/li\u003e\n\u003cli\u003eDisconnect the battery if required by the service procedure.\u003c\/li\u003e\n\u003cli\u003eLocate the thermostat housing.\u003c\/li\u003e\n\u003cli\u003eRemove the thermostat cover carefully.\u003c\/li\u003e\n\u003cli\u003eNote the orientation of the old thermostat.\u003c\/li\u003e\n\u003cli\u003eRemove the old thermostat.\u003c\/li\u003e\n\u003cli\u003eInspect the housing, gasket surface, and cooling passages.\u003c\/li\u003e\n\u003cli\u003eInstall the new Yamaha thermostat in the correct orientation.\u003c\/li\u003e\n\u003cli\u003eReplace gaskets or seals where required.\u003c\/li\u003e\n\u003cli\u003eReinstall the thermostat cover according to Yamaha guidance.\u003c\/li\u003e\n\u003cli\u003eRun the engine with proper water supply.\u003c\/li\u003e\n\u003cli\u003eCheck for leaks and confirm normal operating temperature.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eDo not open the cooling system while the engine is hot.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions About Yamaha Thermostat 67F-12411-01-00\u003c\/h3\u003e\n\u003ch4\u003eWhat is Yamaha 67F-12411-01-00?\u003c\/h4\u003e\n\u003cp\u003eYamaha 67F-12411-01-00 is a genuine Yamaha thermostat part number used in compatible Yamaha outboard cooling systems.\u003c\/p\u003e\n\u003ch4\u003eWhat does a Yamaha outboard thermostat do?\u003c\/h4\u003e\n\u003cp\u003eA Yamaha outboard thermostat helps regulate engine temperature by controlling cooling water flow through the engine as it warms up and operates.\u003c\/p\u003e\n\u003ch4\u003eHow do I know if 67F-12411-01-00 fits my Yamaha outboard?\u003c\/h4\u003e\n\u003cp\u003eConfirm fitment by checking your Yamaha outboard model, horsepower, serial number, parts diagram, and existing thermostat part number. If your diagram lists 67F-12411-01-00, this is the correct product page to review.\u003c\/p\u003e\n\u003ch4\u003eIs 67F-12411-01-00 an OEM Yamaha part number?\u003c\/h4\u003e\n\u003cp\u003eYes, 67F-12411-01-00 is an OEM Yamaha thermostat part number. Always match the full part number before ordering.\u003c\/p\u003e\n\u003ch4\u003eWhat are signs of a bad Yamaha thermostat?\u003c\/h4\u003e\n\u003cp\u003eSigns of a bad Yamaha thermostat can include overheating, running too cool, inconsistent temperature readings, poor warm-up behavior, corrosion, or temperature-related warning alarms.\u003c\/p\u003e\n\u003ch4\u003eCan a bad thermostat cause a Yamaha outboard to overheat?\u003c\/h4\u003e\n\u003cp\u003eYes, a stuck or failed thermostat can cause a Yamaha outboard to overheat if it does not allow proper cooling water flow through the engine.\u003c\/p\u003e\n\u003ch4\u003eShould I replace the gasket with a Yamaha thermostat?\u003c\/h4\u003e\n\u003cp\u003eYes, replace the thermostat gasket or seal if Yamaha service guidance calls for it or if the old gasket is worn, damaged, or compressed.\u003c\/p\u003e\n\u003ch4\u003eIs overheating always caused by the thermostat?\u003c\/h4\u003e\n\u003cp\u003eNo, overheating can also be caused by a worn impeller, weak water pump, clogged cooling passages, poppet valve issues, low water flow, or sensor problems. Diagnose the cooling system before replacing parts.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":45626467877155,"sku":"67F-12411-01-00","price":40.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/nobrand-67f-12411-01-00.jpg?v=1698805233"},{"product_id":"yamaha-thermostat-6ce-12411-00-00-f225-f250-f300-vf250","title":"Yamaha - Thermostat - 6CE-12411-00-00 - F225 F250 F300 VF250","description":"\u003ch2 data-end=\"75\" data-start=\"0\"\u003eYamaha - Thermostat - Engine Cooling System Component - F225 F250 F300 VF250 - 6CE-12411-00-00\u003c\/h2\u003e\n\u003chr data-end=\"80\" data-start=\"77\"\u003e\n\u003ch2 data-end=\"93\" data-start=\"82\" data-section-id=\"rzkdgm\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-end=\"633\" data-start=\"95\"\u003eIf you work around Yamaha outboards long enough, you learn that steady engine temperature makes a big difference in how a motor performs. The Yamaha Thermostat 6CE-12411-00-00 helps regulate coolant flow so the engine warms up properly and stays within its designed temperature range. It is a small component, but it plays an important role in keeping larger offshore motors running smoothly. Many boat owners replace thermostats during routine cooling system service to keep their Yamaha engines dependable on long days out on the water.\u003c\/p\u003e\n\u003chr data-end=\"638\" data-start=\"635\"\u003e\n\u003ch2 data-end=\"655\" data-start=\"640\" data-section-id=\"1ma7m6t\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-end=\"1147\" data-start=\"657\"\u003e• \u003cstrong data-end=\"694\" data-start=\"659\"\u003eGenuine Yamaha OEM Construction\u003c\/strong\u003e – Built to Yamaha specifications for dependable fit and long lasting durability.\u003cbr data-end=\"778\" data-start=\"775\"\u003e• \u003cstrong data-end=\"817\" data-start=\"780\"\u003eConsistent Temperature Regulation\u003c\/strong\u003e – Helps the engine maintain proper operating temperature by controlling coolant flow.\u003cbr data-end=\"906\" data-start=\"903\"\u003e• \u003cstrong data-end=\"934\" data-start=\"908\"\u003eDirect Fit Replacement\u003c\/strong\u003e – Designed to install correctly within Yamaha thermostat housings without modification.\u003cbr data-end=\"1025\" data-start=\"1022\"\u003e• \u003cstrong data-end=\"1062\" data-start=\"1027\"\u003eReliable Cooling System Support\u003c\/strong\u003e – Works with the engine cooling system to help prevent overheating during operation.\u003c\/p\u003e\n\u003chr data-end=\"1152\" data-start=\"1149\"\u003e\n\u003ch2 data-end=\"1184\" data-start=\"1154\" data-section-id=\"1qx5o2j\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-end=\"1375\" data-start=\"1186\"\u003e• F225 - 2010-Current\u003cbr data-end=\"1207\" data-start=\"1204\"\u003e• F250 - 2010-Current\u003cbr data-end=\"1228\" data-start=\"1225\"\u003e• F300 - 2010-Current\u003cbr data-end=\"1249\" data-start=\"1246\"\u003e• FL250 - 2010\u003cbr data-end=\"1266\" data-start=\"1263\"\u003e• FL300 - 2010-Current\u003cbr data-end=\"1288\" data-start=\"1285\"\u003e• LF225 - 2010-Current\u003cbr data-end=\"1310\" data-start=\"1307\"\u003e• LF250 - 2010-Current\u003cbr data-end=\"1332\" data-start=\"1329\"\u003e• LF300 - 2010-Current\u003cbr data-end=\"1354\" data-start=\"1351\"\u003e• VF250 - 2015-Current\u003c\/p\u003e\n\u003chr data-end=\"1380\" data-start=\"1377\"\u003e\n\u003ch2 data-end=\"10\" data-start=\"0\" data-section-id=\"elc90z\"\u003e\u003cspan role=\"text\"\u003eFAQ\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-end=\"208\" data-start=\"12\"\u003e\u003cstrong data-end=\"71\" data-start=\"12\"\u003eQ: What are the signs that a thermostat may be failing?\u003c\/strong\u003e\u003cbr data-end=\"74\" data-start=\"71\"\u003eA: Common symptoms include inconsistent engine temperature, overheating alerts, or an engine that takes longer than normal to warm up.\u003c\/p\u003e\n\u003cp data-end=\"432\" data-start=\"210\"\u003e\u003cstrong data-end=\"281\" data-start=\"210\"\u003eQ: Should the thermostat be replaced during cooling system service?\u003c\/strong\u003e\u003cbr data-end=\"284\" data-start=\"281\"\u003eA: Many technicians recommend replacing thermostats during major cooling system maintenance to keep the engine operating at the correct temperature.\u003c\/p\u003e\n\u003cp data-end=\"615\" data-start=\"434\"\u003e\u003cstrong data-end=\"489\" data-start=\"434\"\u003eQ: Can saltwater use affect thermostat performance?\u003c\/strong\u003e\u003cbr data-end=\"492\" data-start=\"489\"\u003eA: Yes. Salt deposits and corrosion can build up around the thermostat over time, which may affect how it opens and closes.\u003c\/p\u003e\n\u003cp data-end=\"803\" data-start=\"617\"\u003e\u003cstrong data-end=\"680\" data-start=\"617\"\u003eQ: Is thermostat replacement difficult on Yamaha outboards?\u003c\/strong\u003e\u003cbr data-end=\"683\" data-start=\"680\"\u003eA: On most models it is a straightforward job that involves removing the thermostat housing and installing the new unit.\u003c\/p\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"1006\" data-start=\"805\"\u003e\u003cstrong data-end=\"889\" data-start=\"805\"\u003eQ: Will replacing the thermostat help if my engine is running warmer than usual?\u003c\/strong\u003e\u003cbr data-end=\"892\" data-start=\"889\"\u003eA: If the thermostat is sticking or worn, replacing it can help restore proper cooling system temperature control.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":45626468303139,"sku":"6CE-12411-00-00","price":47.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/nobrand-6ce-12411-00-00.jpg?v=1698802448"},{"product_id":"yamaha-thermostat-60v-12411-00-00-f115-vz200-vz225-vz250-vz300","title":"Yamaha - Thermostat - 60V-12411-00-00 - F115 VZ200 VZ225 VZ250 VZ300","description":"\u003ch2 data-section-id=\"fou1ff\" data-start=\"295\" data-end=\"374\"\u003eYamaha - Thermostat - 60V-12411-00-00 - F115 VZ200 VZ225 VZ250 VZ300\u003c\/h2\u003e\n\u003chr data-start=\"376\" data-end=\"379\"\u003e\n\u003ch2 data-section-id=\"6lznae\" data-start=\"381\" data-end=\"394\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"396\" data-end=\"856\"\u003eThe Yamaha Thermostat | 60V-12411-00-00 is one of those parts that keeps your engine running at the right temperature without you thinking about it. When it starts sticking open or closed, you’ll notice it with slow warm-ups, overheating, or inconsistent temps. It controls how coolant flows through the engine, so everything depends on it opening at the right time. If your motor isn’t holding a steady temperature, this is one of the first things to check.\u003c\/p\u003e\n\u003chr data-start=\"858\" data-end=\"861\"\u003e\n\u003ch2 data-section-id=\"14at72t\" data-start=\"863\" data-end=\"880\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"882\" data-end=\"992\"\u003e• \u003cstrong data-start=\"884\" data-end=\"918\"\u003eAccurate Temperature Control –\u003c\/strong\u003e Regulates coolant flow to maintain proper engine operating temperature.\u003c\/p\u003e\n\u003cp data-start=\"994\" data-end=\"1094\"\u003e• \u003cstrong data-start=\"996\" data-end=\"1019\"\u003eOEM Fit Precision –\u003c\/strong\u003e Built to Yamaha specifications for correct operation and proper sealing.\u003c\/p\u003e\n\u003cp data-start=\"1096\" data-end=\"1191\"\u003e• \u003cstrong data-start=\"1098\" data-end=\"1130\"\u003eSupports Engine Efficiency –\u003c\/strong\u003e Helps maintain optimal combustion and overall performance.\u003c\/p\u003e\n\u003cp data-start=\"1193\" data-end=\"1293\"\u003e• \u003cstrong data-start=\"1195\" data-end=\"1228\"\u003eHeat-Resistant Construction –\u003c\/strong\u003e Designed to handle constant temperature cycles and marine use.\u003c\/p\u003e\n\u003chr data-start=\"1295\" data-end=\"1298\"\u003e\n\u003ch2 data-section-id=\"1b7w7ff\" data-start=\"1300\" data-end=\"1332\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1334\" data-end=\"1496\"\u003e• F115 2000\u003cbr data-start=\"1353\" data-end=\"1356\"\u003e• LF115 2000\u003cbr data-start=\"1376\" data-end=\"1379\"\u003e• VZ200 2005-2009\u003cbr data-start=\"1396\" data-end=\"1399\"\u003e• VZ225 2003-2009\u003cbr data-start=\"1416\" data-end=\"1419\"\u003e• VZ250 2003-2009\u003cbr data-start=\"1436\" data-end=\"1439\"\u003e• VZ300 2004-2009\u003cbr data-start=\"1456\" data-end=\"1459\"\u003e• Z250 2003-2005\u003cbr data-start=\"1475\" data-end=\"1478\"\u003e• Z300 2004-2005\u003c\/p\u003e\n\u003chr data-start=\"1498\" data-end=\"1501\"\u003e\n\u003ch2 data-section-id=\"w36ijk\" data-start=\"1503\" data-end=\"1512\"\u003eFAQs\u003c\/h2\u003e\n\u003cp data-start=\"1514\" data-end=\"1645\"\u003e\u003cstrong data-start=\"1514\" data-end=\"1563\"\u003eQ1: What are signs the thermostat is failing?\u003c\/strong\u003e\u003cbr data-start=\"1563\" data-end=\"1566\"\u003eA: Overheating, engine running too cool, or fluctuating temperature readings.\u003c\/p\u003e\n\u003cp data-start=\"1647\" data-end=\"1765\"\u003e\u003cstrong data-start=\"1647\" data-end=\"1694\"\u003eQ2: Can a bad thermostat cause overheating?\u003c\/strong\u003e\u003cbr data-start=\"1694\" data-end=\"1697\"\u003eA: Yes, especially if it sticks closed and restricts coolant flow.\u003c\/p\u003e\n\u003cp data-start=\"1767\" data-end=\"1913\"\u003e\u003cstrong data-start=\"1767\" data-end=\"1827\"\u003eQ3: Should I replace this during cooling system service?\u003c\/strong\u003e\u003cbr data-start=\"1827\" data-end=\"1830\"\u003eA: Yes, it’s a common maintenance item and worth replacing while you’re in there.\u003c\/p\u003e\n\u003cp data-start=\"1915\" data-end=\"2042\"\u003e\u003cstrong data-start=\"1915\" data-end=\"1955\"\u003eQ4: Does this part require a gasket?\u003c\/strong\u003e\u003cbr data-start=\"1955\" data-end=\"1958\"\u003eA: Yes, proper sealing is important to prevent leaks and ensure correct operation.\u003c\/p\u003e\n\u003cp data-start=\"2044\" data-end=\"2165\"\u003e\u003cstrong data-start=\"2044\" data-end=\"2078\"\u003eQ5: Is installation difficult?\u003c\/strong\u003e\u003cbr data-start=\"2078\" data-end=\"2081\"\u003eA: Usually straightforward, just make sure surfaces are clean and properly seated.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":45626473840931,"sku":"60V-12411-00-00","price":49.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/nobrand-60v-12411-00-00.jpg?v=1698808209"},{"product_id":"yamaha-thermostat-6aw-12411-00-00-f300-f350-v8","title":"Yamaha - Thermostat - 6AW-12411-00-00 - F300 F350 (V8)","description":"\u003ch2 data-section-id=\"xdbumj\" data-start=\"163\" data-end=\"220\"\u003eYamaha - Thermostat - Engine Cooling - F300 F350 (V8) - 6AW-12411-00-00\u003c\/h2\u003e\n\u003chr data-start=\"222\" data-end=\"225\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"227\" data-end=\"238\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"240\" data-end=\"794\"\u003eOn large Yamaha offshore motors, temperature control is critical for keeping the engine running smoothly under heavy load. The \u003cstrong data-start=\"367\" data-end=\"404\"\u003eYamaha 6AW-12411-00-00 Thermostat\u003c\/strong\u003e helps regulate coolant flow so the engine warms up properly and maintains a stable operating temperature. When thermostats wear out or stick, engines can run too cold or start running hotter than they should. Replacing this part during regular cooling system service helps keep big horsepower Yamaha outboards performing reliably whether you're cruising offshore or running long distances.\u003c\/p\u003e\n\u003chr data-start=\"796\" data-end=\"799\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"801\" data-end=\"816\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"818\" data-end=\"928\"\u003e• \u003cstrong data-start=\"820\" data-end=\"852\"\u003eAccurate Temperature Control\u003c\/strong\u003e – Regulates coolant flow to maintain proper engine operating temperature.\u003c\/p\u003e\n\u003cp data-start=\"930\" data-end=\"1044\"\u003e• \u003cstrong data-start=\"932\" data-end=\"958\"\u003eOEM Yamaha Engineering\u003c\/strong\u003e – Built to Yamaha factory specifications for dependable performance and proper fit.\u003c\/p\u003e\n\u003cp data-start=\"1046\" data-end=\"1148\"\u003e• \u003cstrong data-start=\"1048\" data-end=\"1078\"\u003eSupports Engine Efficiency\u003c\/strong\u003e – Helps the engine reach and maintain optimal operating conditions.\u003c\/p\u003e\n\u003cp data-start=\"1150\" data-end=\"1269\"\u003e• \u003cstrong data-start=\"1152\" data-end=\"1195\"\u003eImportant Preventative Maintenance Part\u003c\/strong\u003e – Often replaced during cooling system service or water pump maintenance.\u003c\/p\u003e\n\u003chr data-start=\"1271\" data-end=\"1274\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1276\" data-end=\"1306\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1308\" data-end=\"1410\"\u003e• F300 - 2007-2009\u003cbr data-start=\"1326\" data-end=\"1329\"\u003e• F350 - 2007-Current\u003cbr data-start=\"1347\" data-end=\"1350\"\u003e• FL350 - 2010\u003cbr data-start=\"1364\" data-end=\"1367\"\u003e• LF300 - 2007-2009\u003cbr data-start=\"1386\" data-end=\"1389\"\u003e• LF350 - 2007-Current\u003c\/p\u003e\n\u003chr data-start=\"1412\" data-end=\"1415\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"1417\" data-end=\"1423\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1425\" data-end=\"1599\"\u003e\u003cstrong data-start=\"1425\" data-end=\"1496\"\u003eQ: What happens if a thermostat sticks closed on a Yamaha outboard?\u003c\/strong\u003e\u003cbr data-start=\"1496\" data-end=\"1499\"\u003e\u003cstrong data-start=\"1499\" data-end=\"1505\"\u003eA:\u003c\/strong\u003e The engine may overheat because coolant cannot circulate properly through the cooling system.\u003c\/p\u003e\n\u003cp data-start=\"1601\" data-end=\"1763\"\u003e\u003cstrong data-start=\"1601\" data-end=\"1657\"\u003eQ: Can a thermostat cause an engine to run too cool?\u003c\/strong\u003e\u003cbr data-start=\"1657\" data-end=\"1660\"\u003e\u003cstrong data-start=\"1660\" data-end=\"1666\"\u003eA:\u003c\/strong\u003e Yes. If the thermostat sticks open, the engine may never reach its proper operating temperature.\u003c\/p\u003e\n\u003cp data-start=\"1765\" data-end=\"1972\"\u003e\u003cstrong data-start=\"1765\" data-end=\"1840\"\u003eQ: How often should thermostats be replaced on larger Yamaha outboards?\u003c\/strong\u003e\u003cbr data-start=\"1840\" data-end=\"1843\"\u003e\u003cstrong data-start=\"1843\" data-end=\"1849\"\u003eA:\u003c\/strong\u003e Many technicians recommend inspecting or replacing them every couple of seasons as part of routine cooling system service.\u003c\/p\u003e\n\u003cp data-start=\"1974\" data-end=\"2134\"\u003e\u003cstrong data-start=\"1974\" data-end=\"2023\"\u003eQ: Does saltwater use affect thermostat life?\u003c\/strong\u003e\u003cbr data-start=\"2023\" data-end=\"2026\"\u003e\u003cstrong data-start=\"2026\" data-end=\"2032\"\u003eA:\u003c\/strong\u003e Salt buildup and mineral deposits can shorten thermostat life if the engine is not flushed regularly.\u003c\/p\u003e\n\u003cp data-start=\"2136\" data-end=\"2319\"\u003e\u003cstrong data-start=\"2136\" data-end=\"2218\"\u003eQ: Is thermostat replacement typically done with other cooling system service?\u003c\/strong\u003e\u003cbr data-start=\"2218\" data-end=\"2221\"\u003e\u003cstrong data-start=\"2221\" data-end=\"2227\"\u003eA:\u003c\/strong\u003e Yes. It is commonly replaced during water pump service or other cooling system maintenance.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":45626474463523,"sku":"6AW-12411-00-00","price":50.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/nobrand-6aw-12411-00-00.jpg?v=1698803583"},{"product_id":"yamaha-thermostat-66m-12411-01-00-f60-t60-f50-t50-f40-f15-f4-f6-f8-f9-9","title":"Yamaha - Thermostat - 66M-12411-01-00 - F60 T60 F50 T50 F40 F15 F4 F6 F8 F9.9","description":"\u003ch2 data-section-id=\"sl3h5z\" data-start=\"548\" data-end=\"605\"\u003eYamaha -Thermostat - Engine Cooling - F60 T60 F50 T50 F40 F15 F4 F6 F8 F9.9 - 66M-12411-01-00\u003c\/h2\u003e\n\u003chr data-start=\"607\" data-end=\"610\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"612\" data-end=\"623\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"625\" data-end=\"1177\"\u003eKeeping the engine at the right temperature is critical for small and mid-range Yamaha outboards. The \u003cstrong data-start=\"727\" data-end=\"764\"\u003eYamaha 66M-12411-01-00 Thermostat\u003c\/strong\u003e regulates coolant flow through the engine so it warms up properly and maintains stable operating temperatures while running. When a thermostat sticks open or closed, the motor can run too cold, lose efficiency, or start creeping toward overheating. Replacing the thermostat during routine cooling system service helps keep your Yamaha running smooth whether you are trolling, cruising, or running long distances.\u003c\/p\u003e\n\u003chr data-start=\"1179\" data-end=\"1182\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"1184\" data-end=\"1199\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"1201\" data-end=\"1333\"\u003e• \u003cstrong data-start=\"1203\" data-end=\"1236\"\u003eEngine Temperature Regulation\u003c\/strong\u003e – Controls coolant flow to maintain the correct operating temperature during engine operation.\u003c\/p\u003e\n\u003cp data-start=\"1335\" data-end=\"1461\"\u003e• \u003cstrong data-start=\"1337\" data-end=\"1365\"\u003eOEM Yamaha Precision Fit\u003c\/strong\u003e – Manufactured to Yamaha specifications to ensure reliable operation and proper installation.\u003c\/p\u003e\n\u003cp data-start=\"1463\" data-end=\"1586\"\u003e• \u003cstrong data-start=\"1465\" data-end=\"1509\"\u003eSupports Fuel Efficiency and Performance\u003c\/strong\u003e – Helps the engine reach optimal operating temperature for smooth running.\u003c\/p\u003e\n\u003cp data-start=\"1588\" data-end=\"1710\"\u003e• \u003cstrong data-start=\"1590\" data-end=\"1629\"\u003eIdeal Preventative Maintenance Part\u003c\/strong\u003e – Often replaced during water pump service or routine cooling system inspection.\u003c\/p\u003e\n\u003chr data-start=\"1712\" data-end=\"1715\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1717\" data-end=\"1747\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1749\" data-end=\"2161\"\u003e• F2.5 - All Models\u003cbr data-start=\"1768\" data-end=\"1771\"\u003e• F4 - 1999-Current\u003cbr data-start=\"1787\" data-end=\"1790\"\u003e• F6 - 2003-Current\u003cbr data-start=\"1806\" data-end=\"1809\"\u003e• F8 - 2003-Current\u003cbr data-start=\"1825\" data-end=\"1828\"\u003e• T8 - 2003-2010\u003cbr data-start=\"1844\" data-end=\"1847\"\u003e• F9.9 - 2001-Current\u003cbr data-start=\"1865\" data-end=\"1868\"\u003e• T9.9 - 2005-Current\u003cbr data-start=\"1886\" data-end=\"1889\"\u003e• F15 - 2005-2006\u003cbr data-start=\"1906\" data-end=\"1909\"\u003e• F25 - 2005-2006\u003cbr data-start=\"1926\" data-end=\"1929\"\u003e• T25 - All Models\u003cbr data-start=\"1947\" data-end=\"1950\"\u003e• F30 - All Models\u003cbr data-start=\"1968\" data-end=\"1971\"\u003e• F40 - All Models\u003cbr data-start=\"1989\" data-end=\"1992\"\u003e• F40A - All Models\u003cbr data-start=\"2011\" data-end=\"2014\"\u003e• F50 - All Models\u003cbr data-start=\"2032\" data-end=\"2035\"\u003e• T50 - All Models\u003cbr data-start=\"2053\" data-end=\"2056\"\u003e• F60 - All Models\u003cbr data-start=\"2074\" data-end=\"2077\" data-is-only-node=\"\"\u003e• T60 - All Models\u003cbr data-start=\"2095\" data-end=\"2098\"\u003e• F70 - All Models\u003cbr data-start=\"2116\" data-end=\"2119\"\u003e• F80 - All Models\u003cbr data-start=\"2137\" data-end=\"2140\"\u003e• F100 - Up to 2000\u003c\/p\u003e\n\u003chr data-start=\"2163\" data-end=\"2166\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"2168\" data-end=\"2174\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"2176\" data-end=\"2382\"\u003e\u003cstrong data-start=\"2176\" data-end=\"2233\"\u003eQ: What are common signs a thermostat may be failing?\u003c\/strong\u003e\u003cbr data-start=\"2233\" data-end=\"2236\"\u003e\u003cstrong data-start=\"2236\" data-end=\"2242\"\u003eA:\u003c\/strong\u003e The engine may run hotter than normal, take longer to warm up, or trigger temperature warnings if the thermostat stops operating correctly.\u003c\/p\u003e\n\u003cp data-start=\"2384\" data-end=\"2587\"\u003e\u003cstrong data-start=\"2384\" data-end=\"2448\"\u003eQ: Should thermostats be replaced during water pump service?\u003c\/strong\u003e\u003cbr data-start=\"2448\" data-end=\"2451\"\u003e\u003cstrong data-start=\"2451\" data-end=\"2457\"\u003eA:\u003c\/strong\u003e Many technicians replace them at the same time since both are part of the cooling system and accessed during routine maintenance.\u003c\/p\u003e\n\u003cp data-start=\"2589\" data-end=\"2755\"\u003e\u003cstrong data-start=\"2589\" data-end=\"2634\"\u003eQ: Can saltwater cause thermostat issues?\u003c\/strong\u003e\u003cbr data-start=\"2634\" data-end=\"2637\"\u003e\u003cstrong data-start=\"2637\" data-end=\"2643\"\u003eA:\u003c\/strong\u003e Yes. Salt deposits and debris can cause the thermostat to stick if the cooling system is not flushed regularly.\u003c\/p\u003e\n\u003cp data-start=\"2757\" data-end=\"2933\"\u003e\u003cstrong data-start=\"2757\" data-end=\"2812\"\u003eQ: Will a bad thermostat affect engine performance?\u003c\/strong\u003e\u003cbr data-start=\"2812\" data-end=\"2815\"\u003e\u003cstrong data-start=\"2815\" data-end=\"2821\"\u003eA:\u003c\/strong\u003e It can. If the engine runs too cool or too hot, it may not perform efficiently and could suffer long-term wear.\u003c\/p\u003e\n\u003cp data-start=\"2935\" data-end=\"3106\"\u003e\u003cstrong data-start=\"2935\" data-end=\"2997\"\u003eQ: Is this a part most boat owners can replace themselves?\u003c\/strong\u003e\u003cbr data-start=\"2997\" data-end=\"3000\"\u003e\u003cstrong data-start=\"3000\" data-end=\"3006\"\u003eA:\u003c\/strong\u003e In many cases yes, though access varies by model. It is often handled during scheduled maintenance.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":45626474496291,"sku":"66M-12411-01-00","price":40.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/nobrand-66m-12411-01-00.jpg?v=1698805770"},{"product_id":"yamaha-thermostat-6ek-12411-00-00-f115-vf115","title":"Yamaha - Thermostat - 6EK-12411-00-00 - F115 VF115","description":"\u003ch2 data-section-id=\"1ffjlll\" data-start=\"0\" data-end=\"74\"\u003eYamaha - Thermostat - Engine Cooling System Component - F115 VF115 - 6EK-12411-00-00\u003c\/h2\u003e\n\u003chr data-start=\"76\" data-end=\"79\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"81\" data-end=\"92\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"94\" data-end=\"600\"\u003eIf you spend enough time working on Yamaha four-strokes, you learn pretty quickly that the cooling system is everything. This Yamaha thermostat helps regulate engine temperature so the motor warms up properly and stays within its designed operating range. When it opens and closes the way it should, the engine runs smoother, burns fuel cleaner, and avoids unnecessary wear. It’s a simple service item, but replacing a tired thermostat is one of the easiest ways to keep a Yamaha running the way it should.\u003c\/p\u003e\n\u003chr data-start=\"602\" data-end=\"605\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"607\" data-end=\"622\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"624\" data-end=\"1133\"\u003e• \u003cstrong data-start=\"626\" data-end=\"660\"\u003eTemperature Regulation Control\u003c\/strong\u003e – Opens and closes based on coolant temperature to maintain proper engine operating conditions.\u003cbr data-start=\"756\" data-end=\"759\"\u003e• \u003cstrong data-start=\"761\" data-end=\"793\"\u003eOptimized Engine Performance\u003c\/strong\u003e – Helps the motor reach and maintain its designed running temperature for efficient combustion.\u003cbr data-start=\"889\" data-end=\"892\"\u003e• \u003cstrong data-start=\"894\" data-end=\"925\"\u003eGenuine Yamaha Construction\u003c\/strong\u003e – Built to Yamaha specifications for correct fit and reliable cooling system operation.\u003cbr data-start=\"1013\" data-end=\"1016\"\u003e• \u003cstrong data-start=\"1018\" data-end=\"1047\"\u003eRoutine Service Component\u003c\/strong\u003e – Common replacement item during cooling system maintenance or overheating diagnosis.\u003c\/p\u003e\n\u003chr data-start=\"1135\" data-end=\"1138\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1140\" data-end=\"1170\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1172\" data-end=\"1231\"\u003e• F115 - 2014-Current\u003cbr data-start=\"1190\" data-end=\"1193\"\u003e• LF115 - 2014-Current\u003cbr data-start=\"1212\" data-end=\"1215\"\u003e• VF115 - 2015\u003c\/p\u003e\n\u003chr data-start=\"1233\" data-end=\"1236\"\u003e\n\u003ch2 data-section-id=\"1r8frcv\" data-start=\"1238\" data-end=\"1267\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp data-start=\"1269\" data-end=\"1450\"\u003e\u003cstrong data-start=\"1269\" data-end=\"1332\"\u003eQ: What are signs that the thermostat may need replacement?\u003c\/strong\u003e\u003cbr data-start=\"1332\" data-end=\"1335\"\u003eA: Common signs include the engine running too cold, overheating, or fluctuating temperature readings on the gauge.\u003c\/p\u003e\n\u003cp data-start=\"1452\" data-end=\"1650\"\u003e\u003cstrong data-start=\"1452\" data-end=\"1522\"\u003eQ: How often should a thermostat be replaced on a Yamaha outboard?\u003c\/strong\u003e\u003cbr data-start=\"1522\" data-end=\"1525\"\u003eA: Many technicians check or replace thermostats during routine cooling system service or every few seasons depending on use.\u003c\/p\u003e\n\u003cp data-start=\"1652\" data-end=\"1827\"\u003e\u003cstrong data-start=\"1652\" data-end=\"1700\"\u003eQ: Can saltwater use affect thermostat life?\u003c\/strong\u003e\u003cbr data-start=\"1700\" data-end=\"1703\"\u003eA: Yes. Salt buildup and corrosion can affect thermostat operation over time, which is why periodic inspection is important.\u003c\/p\u003e\n\u003cp data-start=\"1829\" data-end=\"1991\"\u003e\u003cstrong data-start=\"1829\" data-end=\"1886\"\u003eQ: Is thermostat replacement a difficult service job?\u003c\/strong\u003e\u003cbr data-start=\"1886\" data-end=\"1889\"\u003eA: On most Yamaha outboards it’s a straightforward maintenance task that can be done with basic tools.\u003c\/p\u003e\n\u003cp data-start=\"1993\" data-end=\"2200\"\u003e\u003cstrong data-start=\"1993\" data-end=\"2061\"\u003eQ: Should thermostats be replaced when servicing the water pump?\u003c\/strong\u003e\u003cbr data-start=\"2061\" data-end=\"2064\"\u003eA: It’s not required, but many boat owners choose to inspect or replace them at the same time since both are part of the cooling system.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":45626478035235,"sku":"6EK-12411-00-00","price":47.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/nobrand-6ek-12411-00-00.jpg?v=1698801488"},{"product_id":"yamaha-xto-425-thermostat-6gr-12411-00-00","title":"Yamaha XTO 425 Thermostat - 6GR-12411-00-00","description":"\u003ch2 data-section-id=\"1fvdmmg\" data-start=\"77\" data-end=\"134\"\u003eYamaha - Thermostat - Engine Cooling - XTO 425 - 6GR-12411-00-00\u003c\/h2\u003e\n\u003chr data-start=\"136\" data-end=\"139\"\u003e\n\u003ch2 data-section-id=\"rzkdgm\" data-start=\"141\" data-end=\"152\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"154\" data-end=\"743\"\u003eOn a big offshore motor like the Yamaha XTO, proper cooling system control is critical. The \u003cstrong data-start=\"246\" data-end=\"283\"\u003eYamaha 6GR-12411-00-00 Thermostat\u003c\/strong\u003e regulates coolant flow through the engine so it warms up correctly and maintains stable operating temperatures under heavy load. When thermostats begin to wear or stick, engines can run too hot or fail to reach proper operating temperature. Installing a fresh OEM thermostat during cooling system service helps keep the XTO performing consistently whether the boat is cruising offshore or running long distances at speed. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"745\" data-end=\"748\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"750\" data-end=\"765\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"767\" data-end=\"895\"\u003e• \u003cstrong data-start=\"769\" data-end=\"802\"\u003ePrecision Temperature Control\u003c\/strong\u003e – Opens and closes at the correct temperature to regulate coolant flow through the engine.\u003c\/p\u003e\n\u003cp data-start=\"897\" data-end=\"1007\"\u003e• \u003cstrong data-start=\"899\" data-end=\"925\"\u003eOEM Yamaha Engineering\u003c\/strong\u003e – Manufactured to Yamaha specifications for exact fit and dependable operation.\u003c\/p\u003e\n\u003cp data-start=\"1009\" data-end=\"1137\"\u003e• \u003cstrong data-start=\"1011\" data-end=\"1047\"\u003eProtects High-Horsepower Engines\u003c\/strong\u003e – Helps prevent overheating or improper warm-up conditions in large offshore outboards.\u003c\/p\u003e\n\u003cp data-start=\"1139\" data-end=\"1251\"\u003e• \u003cstrong data-start=\"1141\" data-end=\"1179\"\u003eRoutine Cooling System Maintenance\u003c\/strong\u003e – Commonly replaced during thermostat inspection or water pump service.\u003c\/p\u003e\n\u003chr data-start=\"1253\" data-end=\"1256\"\u003e\n\u003ch2 data-section-id=\"1qx5o2j\" data-start=\"1258\" data-end=\"1288\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1290\" data-end=\"1314\"\u003e• XTO 425 - All Models\u003c\/p\u003e\n\u003chr data-start=\"1316\" data-end=\"1319\"\u003e\n\u003ch2 data-section-id=\"1hryhf7\" data-start=\"1321\" data-end=\"1327\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1329\" data-end=\"1529\"\u003e\u003cstrong data-start=\"1329\" data-end=\"1393\"\u003eQ: What role does the thermostat play in the XTO 425 engine?\u003c\/strong\u003e\u003cbr data-start=\"1393\" data-end=\"1396\"\u003e\u003cstrong data-start=\"1396\" data-end=\"1402\"\u003eA:\u003c\/strong\u003e It regulates coolant flow so the engine reaches and maintains the proper operating temperature for efficiency and reliability.\u003c\/p\u003e\n\u003cp data-start=\"1531\" data-end=\"1717\"\u003e\u003cstrong data-start=\"1531\" data-end=\"1582\"\u003eQ: What symptoms indicate a thermostat problem?\u003c\/strong\u003e\u003cbr data-start=\"1582\" data-end=\"1585\"\u003e\u003cstrong data-start=\"1585\" data-end=\"1591\"\u003eA:\u003c\/strong\u003e Overheating warnings, inconsistent engine temperature, or an engine that never warms up fully can indicate thermostat issues.\u003c\/p\u003e\n\u003cp data-start=\"1719\" data-end=\"1911\"\u003e\u003cstrong data-start=\"1719\" data-end=\"1787\"\u003eQ: Should thermostats be replaced during cooling system service?\u003c\/strong\u003e\u003cbr data-start=\"1787\" data-end=\"1790\"\u003e\u003cstrong data-start=\"1790\" data-end=\"1796\"\u003eA:\u003c\/strong\u003e Many technicians recommend inspecting or replacing them during scheduled cooling system or water pump maintenance.\u003c\/p\u003e\n\u003cp data-start=\"1913\" data-end=\"2087\"\u003e\u003cstrong data-start=\"1913\" data-end=\"1968\"\u003eQ: Does saltwater operation affect thermostat life?\u003c\/strong\u003e\u003cbr data-start=\"1968\" data-end=\"1971\"\u003e\u003cstrong data-start=\"1971\" data-end=\"1977\"\u003eA:\u003c\/strong\u003e Yes. Salt deposits and mineral buildup can cause thermostats to stick if the engine is not flushed regularly.\u003c\/p\u003e\n\u003cp data-start=\"2089\" data-end=\"2286\"\u003e\u003cstrong data-start=\"2089\" data-end=\"2163\"\u003eQ: Is thermostat replacement a common maintenance item on XTO engines?\u003c\/strong\u003e\u003cbr data-start=\"2163\" data-end=\"2166\"\u003e\u003cstrong data-start=\"2166\" data-end=\"2172\"\u003eA:\u003c\/strong\u003e It is typically inspected during routine service and replaced if there are signs of wear or restricted operation.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":45626485440803,"sku":"6GR-12411-00-00","price":100.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/6gr-12411-00.jpg?v=1698800646"},{"product_id":"yamaha-thermostat-6fp-12411-00-00-f90b-vf90","title":"Yamaha - Thermostat - 6FP-12411-00-00 - F90B VF90","description":"\u003ch2 data-section-id=\"be3k3v\" data-start=\"100\" data-end=\"179\"\u003eYamaha - Thermostat - F90B VF90 - 6FP-12411-00-00 \u003c\/h2\u003e\n\u003chr data-start=\"181\" data-end=\"184\"\u003e\n\u003ch2 data-section-id=\"6lznae\" data-start=\"186\" data-end=\"199\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"201\" data-end=\"678\"\u003eThe Yamaha Thermostat | 6FP-12411-00-00 is one of those parts that keeps your engine running at the right temperature without you noticing it—until something’s off. When it starts sticking or wearing out, you’ll see it in fluctuating temps, slow warm-up, or overheating. It controls when coolant flows through the engine, so it has to open and close at the right time every time. If your motor isn’t holding steady temperature, this is one of the first things worth checking.\u003c\/p\u003e\n\u003chr data-start=\"680\" data-end=\"683\"\u003e\n\u003ch2 data-section-id=\"14at72t\" data-start=\"685\" data-end=\"702\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"704\" data-end=\"814\"\u003e• \u003cstrong data-start=\"706\" data-end=\"740\"\u003eAccurate Temperature Control –\u003c\/strong\u003e Regulates coolant flow to maintain proper engine operating temperature.\u003c\/p\u003e\n\u003cp data-start=\"816\" data-end=\"916\"\u003e• \u003cstrong data-start=\"818\" data-end=\"841\"\u003eOEM Fit Precision –\u003c\/strong\u003e Built to Yamaha specifications for correct operation and proper sealing.\u003c\/p\u003e\n\u003cp data-start=\"918\" data-end=\"1016\"\u003e• \u003cstrong data-start=\"920\" data-end=\"952\"\u003eSupports Engine Efficiency –\u003c\/strong\u003e Helps maintain optimal combustion and consistent performance.\u003c\/p\u003e\n\u003cp data-start=\"1018\" data-end=\"1127\"\u003e• \u003cstrong data-start=\"1020\" data-end=\"1053\"\u003eHeat-Resistant Construction –\u003c\/strong\u003e Designed to handle continuous temperature cycles and marine conditions.\u003c\/p\u003e\n\u003chr data-start=\"1129\" data-end=\"1132\"\u003e\n\u003ch2 data-section-id=\"1b7w7ff\" data-start=\"1134\" data-end=\"1166\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1168\" data-end=\"1201\"\u003e• F90B \u003cbr data-start=\"1182\" data-end=\"1185\"\u003e• VF90 \u003c\/p\u003e\n\u003chr data-start=\"1203\" data-end=\"1206\"\u003e\n\u003ch2 data-section-id=\"w36ijk\" data-start=\"1208\" data-end=\"1217\"\u003eFAQs\u003c\/h2\u003e\n\u003cp data-start=\"1219\" data-end=\"1358\"\u003e\u003cstrong data-start=\"1219\" data-end=\"1268\"\u003eQ1: What are signs the thermostat is failing?\u003c\/strong\u003e\u003cbr data-start=\"1268\" data-end=\"1271\"\u003eA: Overheating, running too cool, or fluctuating engine temperature are common signs.\u003c\/p\u003e\n\u003cp data-start=\"1360\" data-end=\"1478\"\u003e\u003cstrong data-start=\"1360\" data-end=\"1407\"\u003eQ2: Can a bad thermostat cause overheating?\u003c\/strong\u003e\u003cbr data-start=\"1407\" data-end=\"1410\"\u003eA: Yes, especially if it sticks closed and restricts coolant flow.\u003c\/p\u003e\n\u003cp data-start=\"1480\" data-end=\"1612\"\u003e\u003cstrong data-start=\"1480\" data-end=\"1537\"\u003eQ3: Should I replace this during routine maintenance?\u003c\/strong\u003e\u003cbr data-start=\"1537\" data-end=\"1540\"\u003eA: Yes, it’s a common service item when working on the cooling system.\u003c\/p\u003e\n\u003cp data-start=\"1614\" data-end=\"1740\"\u003e\u003cstrong data-start=\"1614\" data-end=\"1654\"\u003eQ4: Does this part require a gasket?\u003c\/strong\u003e\u003cbr data-start=\"1654\" data-end=\"1657\"\u003eA: Yes, proper sealing is important to prevent leaks and ensure correct function.\u003c\/p\u003e\n\u003cp data-start=\"1742\" data-end=\"1862\"\u003e\u003cstrong data-start=\"1742\" data-end=\"1776\"\u003eQ5: Is installation difficult?\u003c\/strong\u003e\u003cbr data-start=\"1776\" data-end=\"1779\"\u003eA: It’s usually straightforward with basic tools and proper cleaning of surfaces.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":45626492551459,"sku":"6FP-12411-00-00","price":73.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/6fp-12411-00-00.jpg?v=1698801130"},{"product_id":"yamaha-thermostat-6ah-12411-00-00-f15c-f20","title":"Yamaha - Thermostat - 6AH-12411-00-00 - F15C F20","description":"\u003ch2 data-section-id=\"19mdfgw\" data-start=\"0\" data-end=\"67\"\u003eYamaha - Thermostat - Cooling System Component - 6AH-12411-00-00\u003c\/h2\u003e\n\u003chr data-start=\"69\" data-end=\"72\"\u003e\n\u003ch2 data-section-id=\"6lznae\" data-start=\"74\" data-end=\"87\"\u003eOverview\u003c\/h2\u003e\n\u003cp data-start=\"88\" data-end=\"513\"\u003eOn smaller Yamaha motors like the F15 and F20, keeping the engine at the right temperature makes a bigger difference than most people think. I’ve seen engines run rough or inefficient just because the thermostat wasn’t doing its job. When it’s working right, the motor warms up properly and stays consistent no matter how long you’re running. It’s one of those simple parts that keeps everything running smooth and efficient.\u003c\/p\u003e\n\u003chr data-start=\"515\" data-end=\"518\"\u003e\n\u003ch2 data-section-id=\"14at72t\" data-start=\"520\" data-end=\"537\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"538\" data-end=\"1089\"\u003e• \u003cstrong data-start=\"540\" data-end=\"574\"\u003eTemperature Regulation Control\u003c\/strong\u003e – Opens and closes at set temperatures to maintain proper engine heat levels.\u003cbr data-start=\"652\" data-end=\"655\"\u003e• \u003cstrong data-start=\"657\" data-end=\"686\"\u003eConsistent Engine Warm-Up\u003c\/strong\u003e – Helps the engine reach optimal operating temperature quickly and stay there.\u003cbr data-start=\"765\" data-end=\"768\"\u003e• \u003cstrong data-start=\"770\" data-end=\"804\"\u003eImproved Combustion Efficiency\u003c\/strong\u003e – Supports better fuel burn by maintaining stable temperature conditions.\u003cbr data-start=\"878\" data-end=\"881\"\u003e• \u003cstrong data-start=\"883\" data-end=\"912\"\u003eEngine Protection Support\u003c\/strong\u003e – Helps prevent overheating and reduces internal wear over time.\u003cbr data-start=\"977\" data-end=\"980\"\u003e• \u003cstrong data-start=\"982\" data-end=\"1006\"\u003eFactory-Spec Fitment\u003c\/strong\u003e – Designed to match Yamaha cooling systems for proper installation and function.\u003c\/p\u003e\n\u003chr data-start=\"1091\" data-end=\"1094\"\u003e\n\u003ch2 data-section-id=\"1b7w7ff\" data-start=\"1096\" data-end=\"1128\"\u003eEngine \u0026amp; Boat Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"1129\" data-end=\"1281\"\u003eDesigned for Yamaha F15 and F20 outboard engines and similar small horsepower applications. Commonly used on portable and light-duty recreational boats.\u003c\/p\u003e\n\u003chr data-start=\"1283\" data-end=\"1286\"\u003e\n\u003ch2 data-section-id=\"x9bttf\" data-start=\"1288\" data-end=\"1296\"\u003eFAQ\u003c\/h2\u003e\n\u003cp data-start=\"1298\" data-end=\"1446\"\u003e\u003cstrong data-start=\"1298\" data-end=\"1344\"\u003eQ: What are signs a thermostat is failing?\u003c\/strong\u003e\u003cbr data-start=\"1344\" data-end=\"1347\"\u003e\u003cstrong data-start=\"1347\" data-end=\"1353\"\u003eA:\u003c\/strong\u003e Overheating, engine running too cool, or inconsistent temperature readings are common signs.\u003c\/p\u003e\n\u003cp data-start=\"1448\" data-end=\"1582\"\u003e\u003cstrong data-start=\"1448\" data-end=\"1499\"\u003eQ: Can a bad thermostat affect fuel efficiency?\u003c\/strong\u003e\u003cbr data-start=\"1499\" data-end=\"1502\"\u003e\u003cstrong data-start=\"1502\" data-end=\"1508\"\u003eA:\u003c\/strong\u003e Yes, if the engine runs too cool, fuel combustion becomes less efficient.\u003c\/p\u003e\n\u003cp data-start=\"1584\" data-end=\"1747\"\u003e\u003cstrong data-start=\"1584\" data-end=\"1633\"\u003eQ: How often should I replace the thermostat?\u003c\/strong\u003e\u003cbr data-start=\"1633\" data-end=\"1636\"\u003e\u003cstrong data-start=\"1636\" data-end=\"1642\"\u003eA:\u003c\/strong\u003e It’s a good idea to inspect it during routine maintenance and replace it if there are any signs of wear.\u003c\/p\u003e\n\u003cp data-start=\"1749\" data-end=\"1891\"\u003e\u003cstrong data-start=\"1749\" data-end=\"1797\"\u003eQ: Does saltwater use affect the thermostat?\u003c\/strong\u003e\u003cbr data-start=\"1797\" data-end=\"1800\"\u003e\u003cstrong data-start=\"1800\" data-end=\"1806\"\u003eA:\u003c\/strong\u003e Yes, corrosion and buildup can affect performance over time without proper flushing.\u003c\/p\u003e\n\u003cp data-start=\"1893\" data-end=\"2013\"\u003e\u003cstrong data-start=\"1893\" data-end=\"1926\"\u003eQ: Is installation difficult?\u003c\/strong\u003e\u003cbr data-start=\"1926\" data-end=\"1929\"\u003e\u003cstrong data-start=\"1929\" data-end=\"1935\"\u003eA:\u003c\/strong\u003e It’s usually straightforward, but proper sealing and placement are important.\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":46937934987555,"sku":"6AH-12411-00-00","price":42.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/6ah-12411-00.jpg?v=1698803758"},{"product_id":"yamaha-thermostat-6ce-12411-10-00","title":"Yamaha - Thermostat - 6CE-12411-10-00","description":"\u003cp\u003e\u003cspan\u003eYamaha - Thermostat - 6CE-12411-10-00\u003c\/span\u003e\u003c\/p\u003e","brand":"Yamaha","offers":[{"title":"Default Title","offer_id":55008273465635,"sku":"6CE-12411-10-00","price":40.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0783\/7410\/9475\/files\/6CE-12411-10-002.jpg?v=1777474070"}],"url":"https:\/\/partsvu.com\/en-mx\/collections\/yamaha-marine-4-stroke-outboard-thermostats.oembed","provider":"PartsVu","version":"1.0","type":"link"}