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The Sierra 18-3605 Thermostat Kit is designed specifically for Mercury 225/250 EFI outboard engines, providing reliable temperature regulation for optimal engine performance. This complete kit features a temperature rating of 143°F (62°C), which is the proper operating temperature for these high-performance two-stroke engines.
Complete Kit Includes:
This kit provides everything needed for a complete thermostat replacement on dual-thermostat Mercury outboard engines. The original Mercury part numbers are 27-62386001, 27-8503181, and 833072004. Each Sierra product meets or exceeds the original equipment part it replaces, ensuring reliable performance and proper fit.
The 143°F thermostats help maintain optimal engine temperature for efficient combustion and performance in marine environments. Sierra is a trusted name in marine aftermarket parts, known for quality components that stand up to harsh saltwater and freshwater conditions.
Tanya was great help
gerad c
Product was as advertised and delivered on time
Roger L
great pricing!
lowell c
Quick and easy
Randolph T
Items arrived quick and worked perfectly!
Stephanie P
Delivery was fast and always checked up on us about the package
Efren A
Order was delivered quickly
William M
Wow, the price was unbeatable and the delivery was quick. The props came in perfect condition, couldn't be happier.
Timothy B
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