BEARING 93306-00612 REC93306-00612

Function and technical context

This bearing is part of the transmission and shaft support system in Yamaha and Mercury marine engines, acting as a rolling element that facilitates the axial rotation of the propeller with minimal friction. It is mounted in the tail area of ​​the engine, where it supports radial and axial loads generated during navigation, especially in reversing and acceleration maneuvers. Its correct operation is essential to maintain the alignment of the output shaft and prevent abnormal vibrations that could compromise the efficiency of the propeller and the structural integrity of the engine-transmission assembly.

When to replace this part?

The deterioration of this bearing is manifested by metallic or grinding noises in the rear area of the engine, excessive play in the tail shaft, or vibrations that intensify with acceleration. It is a good idea to visually inspect the condition of the bearing during each seasonal maintenance, especially if the engine has been exposed to salt water environments where corrosion accelerates wear. Preventive replacement of this component avoids more costly accidents resulting from complete bearing collapse, which could render the engine inoperative or cause secondary damage to the drive shaft.

Equivalent manufacturer part numbers