BOARD 351019 REC351019

Function and Technical Context

This gasket acts as a sealing element between mating surfaces within the outboard motor, preventing fluid or gas leaks in the mounting area where it is installed. It is typically used in cooling, exhaust, or fuel systems, where a tight seal is essential to maintain internal pressure and prevent contamination between circuits. Deterioration of the gasket can cause coolant leaks, water ingress into the oil circuit, or exhaust gas leaks, compromising the engine’s performance and integrity. Proper installation is key to ensuring reliable operation of the assembly under marine operating conditions, where vibrations and thermal changes accelerate wear on sealing components. This corresponds to part number 351019, with direct equivalence for Mercury/Mariner/MerCruiser (878635) and OMC (0351019, 351019).

When should this part be replaced?

The most common symptoms of a deteriorated gasket include the appearance of oil or coolant stains in the joint areas, a burning smell from gas leaks, loss of pressure in the affected circuit, or engine overheating with no apparent cause. It is recommended to inspect the gaskets during every seasonal maintenance and replace them whenever the area where they are located is disassembled, as the tightening process and thermal cycles compromise their sealing ability if they are reused. Replacing the gasket as a preventive measure during any engine work prevents more costly secondary failures, especially while underway.

Compatible Johnson/Evinrude Engines

Equivalent Manufacturer Part Numbers