YAMAHA GASKET 6H4-41112-A0 REC6H4-41112-A0

Function and technical context

This gasket is part of the Yamaha engine sealing systems, ensuring a hermetic seal between components subjected to pressure and fluid circulation. Its correct installation prevents leaks of cooling water, lubricating oil or fuel depending on its specific location in the engine. The deterioration or absence of this gasket compromises the structural integrity of the closed circuit, exposing the engine to infiltrations that can cause internal corrosion, loss of compression and progressive damage to cylinders and crankcases.

When to replace this part?

Gaskets should be inspected after each boating season or every 100-150 hours of engine operation, especially on boats subject to frequent thermal changes or salt water. Symptoms of failure include visible drips around the coupling area, gradual loss of coolant without an apparent source, or presence of moisture in spaces in the crankcase that should be dry. Preventative replacement during scheduled maintenance checks is significantly more economical than repairing damage from a prolonged leak, which can affect multiple internal components.

Compatible Yamaha engines

Equivalent manufacturer part numbers