YAMAHA GEAR COVER 6E5-45321-00 REC6E5-45321-00

Function and technical context

The shift cover is a closure component that is part of the marine engine transmission system, sealing the gear housing and preventing salt water and contaminants from entering the interior of the mechanism. In medium-power Yamaha engines such as the F115, this part works in conditions of extreme humidity and constant marine corrosion, so its structural integrity is essential to maintain the tightness of the gearbox. A failure or corrosion in this cover can allow water to infiltrate the transmission system, causing internal oxidation, loss of oil viscosity and gear and clutch failure.

When to replace this part?

Gear covers usually show surface corrosion, fine cracks or deformations after several years of exposure to the saline environment, especially if oil leaks around the gearbox or hard shifts on the control lever have been detected. It is recommended to visually inspect during each seasonal maintenance and replace preventively if it shows advanced rust, compromised sealing or water contact marks. Changing the cover preventively is an economical intervention that prevents costly repairs of the complete gearbox while sailing.

Equivalent manufacturer part numbers