YAMAHA BUSHING REC90386-38M89

Function and technical context

The Yamaha 90386-38M89 bushing is a precision component that acts as a guiding and supporting element in the transmission and mechanical drive system of Yamaha outboard engines. Integrated into the shaft and camshaft assemblies, this bushing facilitates smooth, controlled movement while evenly distributing the operating loads generated during cruising. Its correct condition is essential to maintain optimal alignment of the internal rotating components, prevent excessive vibrations and avoid premature wear of adjacent parts. A deterioration or loosening of this bushing generates abnormal clearances in the transmission, loss of effective engine power and, in serious cases, can cause significant structural damage to the engine block that requires high-cost repairs.

When to replace this part?

Precision bushings require periodic inspection during seasonal maintenance, especially after prolonged periods of sailing or in saltwater conditions that accelerate metal deterioration. Typical symptoms of wear include unusual vibrations in engine operation, intermittent metallic noises in the transmission area, reduced throttle response or abnormal movement of the steering controls. It is recommended to replace this component preventively if any looseness is detected during the technical inspection, since an early replacement avoids significantly more costly repairs and guarantees the safe operation of the boat under all circumstances.

Equivalent manufacturer part numbers