EXHAUST GASKET 27-11456M

Function and technical context

This exhaust gasket is a critical sealing component that seals the joint between the exhaust manifold and exhaust system on Mercury, MerCruiser and Yamaha marine engines. It works in the exhaust system, supporting high pressures and temperatures generated by the combustion gases expelled from the engine. Its deterioration allows toxic gas leaks, system vibration, salt water entry into the combustion chambers and loss of engine performance, which compromises the reliability and safety of navigation.

When to replace this part?

Typical symptoms of deterioration include abnormal exhaust noises, visible water or gas leaks, loss of power, and accelerated corrosion of adjacent components. It is recommended that this gasket be checked and replaced during seasonal maintenance, especially on saltwater boats where corrosion accelerates wear. Preventively replacing this gasket prevents costly repairs and ensures a long-lasting seal under demanding boating conditions.

Compatible Mercury Mariner Engines

Equivalent manufacturer part numbers