VERTICAL AXIS 676-45501-10

Function and technical context

The 676-45501-10 vertical shaft is a fundamental component of the transmission system in Yamaha outboard motors, responsible for transferring the power from the engine to the propeller through the gearbox. This axle works under conditions of constant load and high rotation, supporting the torsional forces generated during acceleration, cruising and maneuvering of the vessel. Its correct operation is critical to maintain efficient engine propulsion; A deteriorated or damaged axle can cause abnormal vibrations, loss of traction, water entering the gearbox and, in extreme cases, complete blocking of the transmission.

When to replace this part?

Typical symptoms of vertical shaft wear include excessive vibrations while sailing, abnormal axial play, metallic noises from the gearbox, and loss of propeller alignment. Although there is no fixed maintenance interval, it is recommended to visually inspect this component during each seasonal inspection, especially after prolonged navigation or in silty waters. Preventive shaft replacement prevents costly emergency repairs at sea and ensures the operational safety of the vessel.

Equivalent manufacturer part numbers