312345 OMC GASKET

OEM OMC 312345 is a base to crankcase gasket used on Johnson/Evinrude outboard engines, also documented as an intake gasket. This gasket seals the interface between engine base and crankcase, preventing oil seepage and maintaining proper combustion chamber pressure. Suitable for various Johnson Evinrude outboard models across multiple displacement ranges. Part 312345 is commonly included in powerhead gasket kits for engine rebuilds. Replace during engine servicing when visible wear or leakage occurs at base mounting points.