YAMAHA COVER GASKET 6F5-13645-A1 REC6F5-13645-A0

Function and technical context

This cover gasket is part of the engine crankcase sealing system, guaranteeing tightness between the valve cover and the engine block on boats equipped with Yamaha outboard engines. Its function is to prevent the entry of water and humidity into the internal cavities of the engine, as well as to prevent lubricating oil leaks that would compromise the operation of the lubrication system. The deterioration of this gasket can cause oil leaks, water entry into critical areas, internal corrosion and loss of pressure in the lubrication circuit, situations that directly affect the reliability and performance of the propeller.

When to replace this part?

Cover gaskets wear progressively from exposure to thermal cycling, engine vibration and marine humidity, especially on vessels with frequent use or in saline conditions. Typical symptoms include visible oil drips in the cap area, oil stains on the casing or around the engine, and in advanced cases, water entering the crankcase which degrades the quality of the lubricant. It is recommended to inspect this gasket at each seasonal inspection and replace it preventively every two or three seasons of intensive navigation, or when the first signs of leaks are detected; Timely replacement prevents more costly repairs due to internal corrosion or damage to the motor bearings.

Equivalent manufacturer part numbers