YAMAHA GASKET 6E5-13645-A1 REC6E5-13645-A1-00

Function and technical context

This gasket plays a critical sealing role in the cooling system of Yamaha outboard motors, preventing coolant leaks between pressurized components. It works in the fresh water circuit that protects the engine block from direct contact with salt water, avoiding internal corrosion and mineral deposits that compromise thermal efficiency. A poor seal at this interface allows water to enter areas where it should not circulate, causing pressure loss in the cooling system, engine overheating and potential catastrophic failure of the propeller.

When to replace this part?

Cooling gaskets show symptoms of deterioration when drips appear under the cylinder head, gradual loss of coolant in the tank without visible cause, or engine temperature indicators constantly increasing during navigation. It is recommended to check the condition of this gasket during each seasonal maintenance and replace it preventively if hardening, deformation or traces of corrosion are observed in the contact area. Preventive replacement before an extended voyage prevents disruptions at sea and more costly damage to the cooling system.

Equivalent manufacturer part numbers