Maximize engine performance and efficiency by running at the optimum temperature A failed thermostat can cause an engine to run at outside of its optimum temperature adversely affect performance and efficiency. The fix can be as simple as replacing the thermostat. Sierra makes gathering the parts easy by packaging the thermostat with all the necessary components for an easy out the box installation. Kit includes thermostat and gaskets. For 50 years Sierra has been producing parts engineered to meet or exceed the specifications of marine engine manufacturers and has gained the confidence of engine manufacturers and boat builders. Boaters and technicians can be assured a Sierra part will fit right the first time and restore function to OEM specifications. Key Features Thermostat meets or exceeds manufacturer specifications Complete kit includes thermostat, and gaskets to eliminate time spent sourcing individual parts Temperature rating of 142F Compatible with Ford based 302 and 351 cu in raw water cooled marine enginesFits CH190/220-305cu.in., CH270-350cu.in., CH350-454cu.in enginesThe Sierra Engine Parts Selector In addition to thermostats, we offer a wide variety of other engine parts manufactured by Sierra. To see if we have the part you need, see ourEngine Parts Selector, where you can search by engine make, serial number and model or year of manufacture.