COVER GASKET 27-8347751

Function and technical context

The 27-8347751 REC67C-41114-00 head gasket is a critical sealing component that seals the interface between the cylinder head and engine block in marine cooling systems. Its main function is to guarantee the absolute tightness of the combustion chambers and coolant circuits, preventing coolant leaks into the engine crankcase and compression losses in the cylinders. Designed to withstand intense thermal cycles and sustained pressures typical of the marine environment, this gasket is essential to maintain the integrity of the cooling and combustion systems during continuous navigation. The deterioration of this gasket causes loss of coolant, progressive overheating of the engine, entry of salt water into the cylinders and accelerated degradation of the lubrication oil.

When to replace this part?

The cover gaskets show signs of aging after prolonged compression cycles and thermal variations, especially visible through specific coolant losses in the cover area without apparent cause in hoses or radiator. It is recommended to check the condition of this gasket during each seasonal maintenance and consider its preventive replacement if minimal leaks are detected around the perimeter of the cover, visible oxidation or traces of crystallized coolant at the closing points. Replacing the cover gasket preventively is highly recommended during major engine repairs or after prolonged periods of storage, thus avoiding critical breakdowns in high-altitude navigation where access to technical services is limited.

Compatible engines

Mercury/MerCruiser

Equivalent manufacturer part numbers