YAMAHA BEARING 93310-727U0 REC93310-727U0

Function and technical context

This bearing is a critical component in the transmission and rotation systems of Yamaha engines, responsible for facilitating the smooth and frictionless rotation of shafts subjected to constant loads. It works within the engine's propulsion system, supporting radial and axial forces that are generated during the operation of the propeller. Its deterioration causes abnormal vibrations, loss of engine performance and, in advanced states of wear, it can compromise the structural integrity of adjacent components due to misalignment and progressive rubbing.

When to replace this part?

The bearings show symptoms of failure such as rubbing or grinding noise during engine operation, excessive vibration noticeable in the structure of the boat, or progressive loss of smoothness in rotation. It is recommended that this component be inspected at each seasonal inspection and replaced preventively every 500-800 hours of operation or if any signs of radial play, corrosion or thermal discoloration are detected. Preventive replacement at the dock avoids unexpected failures in navigation and high-cost emergency repairs.

Equivalent manufacturer part numbers