Marine Thermostats & Sensors
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GLM®Thermostat Housing Kit for GM EnginesThermostat Housing Kit for GM Engines by GLM®. What can be more fun and rewarding than boating on the open waters? This is an excellent solution for your boating needs. This product is great for use in all marine applications. It will...Expertly crafted from premium materialsDesigned to match rigorous quality standards$397.76 - $466.09 - WSM®Thermostat GasketThermostat Gasket by WSM®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...Fabricated on state-of-the-art equipmentComply with stringent standards for quality$0.92 - $3.62
- Weiand®Remote Thermostat Housing for Chevrolet EnginesRemote Thermostat Housing for Chevrolet Engines by Weiand®. The offset adapter is used primarily in marine applications for clearance of the large water outlet normally encountered. What can be more fun and rewarding than boating on the...Expertly crafted from premium materialsDesigned to match rigorous quality standards$213.95 - $235.95
- Weiand®Remote Thermostat Housing for Chevrolet EnginesRemote Thermostat Housing for Chevrolet Engines by Weiand®. The water outlet spacer is used primarily in marine applications where hose to supercharger nose clearance is required. What can be more fun and rewarding than boating on the...Expertly crafted from premium materialsDesigned to match rigorous quality standards$235.95
- CDI Electronics®Coolant Temperature Sensor for MerCruiser EnginesCoolant Temperature Sensor for MerCruiser Engines by CDI Electronics®. What can be more fun and rewarding than boating on the open waters? This is an excellent solution for your boating needs. This product is great for use in all marine...Expertly crafted from premium materialsDesigned to match rigorous quality standards$26.61
- CDI Electronics®Coolant Temperature Sensor for Volvo Penta EnginesCoolant Temperature Sensor for Volvo Penta Engines by CDI Electronics®. What can be more fun and rewarding than boating on the open waters? This is an excellent solution for your boating needs. This product is great for use in all...Expertly crafted from premium materialsDesigned to match rigorous quality standards$43.03
- Prime Line®Thermostat Gasket for Johnson/Evinrude EnginesThermostat Gasket for Johnson/Evinrude Engines by Prime Line®. What can be more fun and rewarding than boating on the open waters? This is an excellent solution for your boating needs. This product is great for use in all marine...High quality at an affordable priceExpertly made from premium materials$2.75 - $3.69
- Prime Line®Thermostat Gasket for MerCruiser EnginesThermostat Gasket for MerCruiser Engines by Prime Line®. What can be more fun and rewarding than boating on the open waters? This is an excellent solution for your boating needs. This product is great for use in all marine applications....High quality at an affordable priceExpertly made from premium materials$4.26 - $8.08
- Prime Line®Thermostat Gasket for Mercury EnginesThermostat Gasket for Mercury Engines by Prime Line®. What can be more fun and rewarding than boating on the open waters? This is an excellent solution for your boating needs. This product is great for use in all marine applications. It...High quality at an affordable priceExpertly made from premium materials$3.69
- Prime Line®Thermostat Gasket for OMC EnginesThermostat Gasket for OMC Engines by Prime Line®. What can be more fun and rewarding than boating on the open waters? This is an excellent solution for your boating needs. This product is great for use in all marine applications. It...High quality at an affordable priceExpertly made from premium materials$4.26 - $8.08
- Prime Line®Thermostat Gasket for Volvo Penta EnginesThermostat Gasket for Volvo Penta Engines by Prime Line®. What can be more fun and rewarding than boating on the open waters? This is an excellent solution for your boating needs. This product is great for use in all marine...High quality at an affordable priceExpertly made from premium materials$4.26 - $6.24
- Prime Line®Thermostat for Suzuki EnginesThermostat for Suzuki Engines by Prime Line®. What can be more fun and rewarding than boating on the open waters? This is an excellent solution for your boating needs. This product is great for use in all marine applications. It will...Expertly crafted from premium materialsDesigned to match rigorous quality standards$33.45
- Prime Line®Thermostat for Yamaha EnginesThermostat for Yamaha Engines by Prime Line®. What can be more fun and rewarding than boating on the open waters? This is an excellent solution for your boating needs. This product is great for use in all marine applications. It will...Expertly crafted from premium materialsDesigned to match rigorous quality standards$33.45
- WSM®Thermostat (775-200)Thermostat by WSM®. Temperature Rating: 122° F. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Fabricated on state-of-the-art equipmentComply with stringent standards for quality$19.36
- WSM®Thermostat Gasket (540-27)Thermostat Gasket (540-27) by WSM®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Fabricated on state-of-the-art equipmentComply with stringent standards for quality$3.62
- WSM®Thermostat Gasket (541-27)Thermostat Gasket (541-27) by WSM®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Fabricated on state-of-the-art equipmentComply with stringent standards for quality$2.49
- WSM®Thermostat Gasket (517-31)Thermostat Gasket (517-31) by WSM®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Fabricated on state-of-the-art equipmentComply with stringent standards for quality$0.92
A thermostat is a crucial engine component meant for keeping the operating temperature under control, which is necessary for optimal engine performance and fuel consumption. Its working principle in boat motors is almost the same as in cars: when the powerplant gets hotter, the thermostat gradually opens and vice versa. However, most outboard motors have an open-loop cooling system instead of a radiator and take the water from the environment. A thermostat is thus installed to prevent this water from entering the engine when it's still cold, and gradually opens when the motor becomes warmer.
When engine temperature gets lower, the thermostat gradually closes. But over time, this part goes bad and may get stuck in an open or closed position. In the first case, the powerplant gets slow to warm up or even can't achieve its normal temperature, which results in poor performance and high emissions, especially in cold weather. The second case is fraught with engine overheating that may happen even at idle or low running speed. If you're going to change your thermostat, browse our marine thermostats & sensors inventory where you can also find all the necessary gaskets, housings, and other components.
