319661 OMC BYPASS COVER GASKET

OEM Evinrude Johnson OMC bypass assembly cover gasket (0319661) seals the thermostat bypass housing on outboard engines. Equivalent to Sierra Marine 18-0971 and GLM 34340. Genuine factory part manufactured by Bombardier/OMC for Johnson and Evinrude outboard motors. Maintains proper coolant flow through the bypass circuit during engine warm-up, ensuring accurate thermostat operation and preventing coolant system leaks. Available from marine specialists including Crowley Marine, Marine Engine, and eBay retailers. Essential component for engines requiring precise thermal management and cooling system integrity.