REVERSE PINION BEARING 93306-209U0

Function and technical context

The reverse sprocket bearing is a critical drive system component that supports and guides the reverse sprocket during engine operation. This bearing works inside the gearbox, allowing the pinion to rotate without excessive friction when reverse gear is engaged. Wear or deterioration of the bearing causes abnormal vibrations, metallic noises during reversal and, in advanced cases, can cause a partial blockage of the transmission or misalignment of the pinion that compromises the reliability of the reverse maneuver, especially critical in docking or emergency maneuvers.

When to replace this part?

Typical symptoms of wear include an audible chattering or grinding noise when engaging reverse gear, vibration transmitted to the shift lever or helmet, and an abnormal increase in resistance to shifting gears. This type of bearing should be inspected during periodic transmission maintenance services or when the above symptoms are detected; Preventive replacement during general engine inspections avoids unexpected failures in navigation and costly repairs at the dock. For Yamaha engines in regular use, it is recommended to check the condition of the bearing every boating season or after 300-400 hours of operation.

Equivalent manufacturer part numbers