YAMAHA INTAKE GASKET 648-13621-A1

Function and technical context

The intake gasket constitutes a critical component in the air intake system of the Yamaha engine, responsible for hermetically sealing the joint between the intake manifold and the cylinder head. Its main function is to prevent air leaks in the intake circuit, maintaining the integrity of the combustion system and preventing external contaminants from entering the combustion chambers. A poor seal in this gasket generates pressure losses in the intake manifold, leading to irregularities in engine operation, decreased power and unregulated fuel consumption.

When to replace this part?

The intake gasket requires replacement when noticeable air leaks are observed around the manifold, especially after prolonged navigation campaigns or when the engine has difficulty starting cold, rough idling or loss of power without apparent cause in the fuel or ignition system. It is recommended to check its condition during each seasonal maintenance and replace it preventively during disassembly work on the intake manifold to avoid urgent repairs during the navigation season.

Equivalent manufacturer part numbers