PIÑON ATTACK 6E5-45551-02

Function and technical context

The drive pinion is the drive gear of the transmission system in Yamaha outboard motors, responsible for transferring power from the crankshaft to the propeller through the tail shaft. This part works within the gearbox gear assembly, withstanding extreme torque forces during acceleration and gear shifting. Its correct operation is essential to guarantee efficient transmission of engine power, avoiding slipping, abnormal vibrations or loss of propulsion thrust that would compromise the safety and performance of the boat.

When to replace this part?

Symptoms such as metallic squealing or creaking coming from the gearbox, difficulty engaging gears, or progressive loss of thrust during acceleration indicate wear on the drive pinion. It is recommended to check the condition of this gear during annual maintenance during the boating season, especially if the boat has frequently operated under heavy load conditions or sudden gear changes. Preventive replacement of this part prevents cascading damage to other transmission components and reduces the risk of unforeseen breakdowns at sea.

Compatibility with Yamaha engines

Equivalent manufacturer part numbers