SUZUKI ATTACK PIN 57311-98600

Function and technical context

The drive pinion is a bevel gear located in the outboard gearbox that transmits torque from the vertical drive shaft to the horizontal propeller shaft. It works within the lower transmission system, meshing with the forward and reverse gear pinions to allow rotation reversal without modifying the direction of rotation of the motor. Its wear or breakage causes a total loss of propulsion, metallic noises in the box and, in extreme cases, damage to other gears in the bevel group that can render the entire transmission unusable. The reference 57311-98600 is updated by Suzuki with the references 57311-91J00 and 57611-91J10, guaranteeing full interchangeability with the most modern parts in the range.

When to replace this part?

The most common symptoms of wear of the drive pinion are knocking or metallic grinding noises coming from the lower case during navigation, abnormal vibration in the tail of the engine and difficulty or inability to shift into gear. It is recommended to check the condition of the transmission gears every 100-200 hours of service or during each seasonal maintenance, taking advantage of the lower case oil change, since the presence of metal files in the drain oil is a clear indicator of internal wear. Replacing the drive pinion preventively when any of these symptoms are detected prevents the spread of damage to the ring gear and the reversing mechanism, which would multiply the cost of the repair.