309-0626 Onan Thermostat By-Pass Kit OBSOLETE For MCE Ensign Series 1/15/2026 THIS PART IS IN STOCK as of 1/15/2026

309-0626 Onan Thermostat By-Pass Kit OBSOLETE For MCE Ensign Series

Thermostats (two): Two thermostats, one in each cylinder head, regulate the engine operating temperature by controlling the flow of coolant, for better efficiency and engine life. It is recommended that both thermostats be replaced when the coolant is changed.

"1/15/2026 THIS PART IS IN STOCK as of 1/15/2026"