REVERSE PINION BEARING 93306-001U1

Function and technical context

The reverse sprocket bearing is a critical component in the Yamaha outboard motor drive system, responsible for supporting the radial and axial loads generated by the sprocket during rotational reversal of the output shaft. This piece works inside the tail group, where it must resist intense mechanical stress and the humid and saline environment of the marine environment. A worn or damaged bearing causes excessive play in the gear system, characteristic metallic noises during reverse gear and, in advanced cases, water ingress through the drive shaft.

When to replace this part?

Replacement becomes necessary when abnormal vibrations or squeaks appear when engaging reverse gear, symptoms that indicate wear of the roller and loss of precision in the adjustment. It is recommended to check the condition of the bearing during each seasonal maintenance and especially after prolonged periods of sailing in salt water. Preventive replacement of this component prevents sudden breakdowns at sea and significantly reduces the risk of secondary damage to gears and associated shafts.

Equivalent manufacturer part numbers