FORWARD DRIVE PIN 6H4-45560-00

Function and technical context

The forward gear is the gear responsible for transmitting the engine's power to the propeller in the forward direction. It is part of the transmission system, working in conjunction with the shift mechanism to engage and disengage according to the required maneuver. Its condition is critical for propulsion capacity: a worn or damaged pinion causes gear slippage, loss of thrust, abnormal vibrations and, in severe cases, the inability to navigate in a straight line or maintain speed.

When to replace this part?

Typical symptoms of pinion wear include metallic squeaks during gear changes, loss of engagement under load or forced turns, and noticeable vibrations in the tiller. It is recommended to inspect the condition of the pinion every season or after 200-300 hours of navigation, especially in saltwater boats where corrosion accelerates wear. Preventive replacement prevents sudden breakdown during navigation and minimizes risks associated with loss of propulsion control.

Compatible Yamaha Engines

Equivalent manufacturer part numbers