Maximize engine performance by running at the optimum temperature. A failed thermostat can cause an engine to run at outside of its optimum temperature and adversely affect performance and efficiency. The fix can be as simple as replacing the thermostat. Sierra makes sourcing parts for the job easy by packaging the thermostat, gaskets and seal for an easy out the box installation. Each Sierra part is engineered to meet or exceed Volvo Penta specifications. 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 Volvo Penta specifications Temperature rating of 145F (63C) Complete kit includes thermostat, gasket and seal to eliminate time spent sourcing individual parts 18-3662 Application Guide ApplicationOEM Part NumberGLM13381Mallory9-43004Volvo Penta876305, 875794The Sierra Engine Parts SelectorIn addition to thermostat kits, 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.