PIÑON ATTACK 6H9-45551-00

Function and technical context

The drive pinion is the drive gear of the transmission system in outboard engines, responsible for transferring power from the crankshaft to the gearbox and propeller. This component works under conditions of continuous mechanical stress, subjected to vibrations, extreme torsional forces and, in many cases, direct exposure to the saline marine environment. Its correct operation is critical to guarantee fluid acceleration, precise gear changes and full transmission of engine power to propulsion.

When to replace this part?

Symptoms of drive pinion wear include abnormal metallic noises during gear shifting, noticeable vibrations in the steering knuckle, difficulty engaging gears, or transmission slippage under load. It is recommended to check this part during each seasonal maintenance and, if visible wear on the teeth or excessive play in the gear is observed, replace it immediately. Changing the pinion preventively avoids cascading damage to the gearbox and costly repairs while sailing.

Equivalent manufacturer part numbers