YAMAHA COVER GASKET 6F5-13621-A1 REC6F5-13621-A1

Function and technical context

The cover gasket is an essential sealing component in the distribution system and crankcase of the Yamaha engine. This piece seals the joint between the cylinder head and the engine block, preventing lubricating oil leaks and the entry of water or contaminants into the combustion chamber. The correct operation of this gasket is critical to maintain the internal lubrication pressure, prevent localized overheating and guarantee the tightness of the closed circuits of the marine engine. If this gasket degrades or loses elasticity, oil leaks, loss of compression and progressive corrosion of internal components can occur.

When to replace this part?

The cover gaskets show visible wear when oil stains are observed around the joint area between the cover and the block, a reduction in the oil level without apparent cause, or the presence of moisture in the engine oil. It is recommended to inspect this gasket at each seasonal maintenance check and replace it preventively every 5-7 years of intense use or when the first signs of aging of the elastomer are detected. A preventive replacement avoids complex and costly repairs resulting from persistent leaks that compromise the reliability of the engine in navigation.

Equivalent manufacturer part numbers