YAMAHA MANIFOLD GASKET 6K7-13645-A2

Function and technical context

The manifold gasket is a critical sealing element in the cooling system of Yamaha outboard motors. This component guarantees the tightness between the water collector and the cooling circuit pipes, preventing fresh or salt water leaks that could compromise the operation of the propeller. A deteriorated or defective gasket allows water to infiltrate into areas where it should not circulate, causing internal corrosion, loss of thermal efficiency and entry of moisture into the engine crankcase.

When to replace this part?

Symptoms of wear on manifold gaskets include visible dripping around the mating area, an increase in engine temperature without apparent cause, or the formation of rust deposits on adjoining surfaces. It is recommended to check the condition of this gasket during each seasonal maintenance, especially after sailing in salt water, and replace it preventively if hardening, cracks or loss of elasticity of the material are observed. Changing the gasket early avoids costly repairs resulting from secondary corrosion or water entry into the lubrication system.

Equivalent manufacturer part numbers

This gasket is supplied under multiple Yamaha reference code variants, all of them functionally identical and compatible with the cooling manifolds of the brand's outboard motors. The main reference is 6K7-13645-A2, the other variations being the result of changes in the catalog nomenclature or updates to manufacturing lots. To ensure correct identification when ordering, always consult the technical manual or identification label of your engine.