{"product_id":"yanmar-marine-engine-thermostat-129470-49801","title":"Yanmar Marine Engine Thermostat - OEM Cooling System Component","description":"\u003cp\u003e\u003cstrong\u003eOEM Thermostat for Yanmar Marine Engines\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis genuine Yanmar thermostat is designed for marine engines, regulating coolant temperature to maintain optimal engine operating temperature. Essential for cooling system service, temperature control, and ensuring efficient engine operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGenuine OEM thermostat for Yanmar marine engines\u003c\/li\u003e\n\u003cli\u003ePrecision-calibrated opening temperature for optimal engine operation\u003c\/li\u003e\n\u003cli\u003eRegulates coolant flow to maintain proper engine temperature\u003c\/li\u003e\n\u003cli\u003eManufactured to exact Yanmar specifications\u003c\/li\u003e\n\u003cli\u003eEssential for efficient engine operation and longevity\u003c\/li\u003e\n\u003cli\u003eReliable performance in demanding marine environments\u003c\/li\u003e\n\u003cli\u003ePrevents overcooling and ensures proper warm-up\u003c\/li\u003e\n\u003cli\u003eProtects engine from overheating and thermal stress\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFunction \u0026amp; Importance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe thermostat is a temperature-controlled valve that regulates coolant flow through the engine. When the engine is cold, the thermostat remains closed, restricting coolant flow to allow rapid warm-up to operating temperature. Once the coolant reaches the thermostat's opening temperature, the valve opens to allow coolant circulation through the heat exchanger, maintaining optimal engine temperature. Proper engine temperature is critical for efficiency, emissions, component longevity, and preventing damage from overcooling or overheating.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTemperature Regulation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMarine engines must reach and maintain proper operating temperature for optimal performance. Running too cold causes incomplete combustion, increased wear, poor fuel efficiency, and carbon buildup. Running too hot causes overheating damage, increased wear, and potential engine failure. The thermostat maintains the precise temperature range for optimal engine operation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM Quality:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eGenuine Yanmar OEM thermostats are precision-calibrated to open at the correct temperature for your specific engine. They use high-quality materials and construction to ensure reliable operation and long service life. Using genuine OEM thermostats ensures proper temperature regulation and protects your engine investment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen to Replace:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eReplace thermostat during cooling system service, typically every 2-3 years or as specified by Yanmar. Symptoms of thermostat failure include engine running too cold (thermostat stuck open), engine overheating (thermostat stuck closed), slow warm-up, or temperature fluctuations. A failed thermostat can cause serious engine damage - replace at first sign of problems or during preventive maintenance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eDrain cooling system before thermostat replacement. Clean thermostat housing thoroughly. Install new thermostat with proper orientation - note temperature rating and flow direction markings. Use new gasket or O-ring. Torque housing fasteners to Yanmar specifications. Refill cooling system with proper coolant mixture. Bleed air from cooling system. Monitor temperature gauge during initial operation to verify proper thermostat function.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eService Best Practices:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAlways use genuine Yanmar OEM thermostat with correct temperature rating. Replace thermostat gasket or O-ring during installation. Flush cooling system when replacing thermostat. Use proper coolant mixture. Bleed air from cooling system completely. Monitor engine temperature after installation. Replace thermostat preventively rather than waiting for failure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eType: Engine thermostat\u003c\/li\u003e\n\u003cli\u003eCompatible with: Yanmar marine engines\u003c\/li\u003e\n\u003cli\u003ePart Number: 129470-49801\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"YAN","offers":[{"title":"Default Title","offer_id":43564307677220,"sku":"129470-49801","price":128.7,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/129470-49801.png?v=1771183989","url":"https:\/\/marisolmarine.com\/products\/yanmar-marine-engine-thermostat-129470-49801","provider":"Marisol Marine Company","version":"1.0","type":"link"}