REVERSE GEAR PIN 688-45571-00-00

Function and technical context

The reverse sprocket is the gear responsible for reversing the direction of rotation of the propeller, allowing the boat to sail in reverse. This component is part of the engine transmission system, located in the marine gearbox where it couples with the forward pinion and driving gears. Its correct operation is essential for mooring, docking and navigation maneuvers in confined spaces. Wear or breakage of this pinion seriously compromises the controllability of the boat, preventing reverse gear changes and limiting operational safety in port.

When to replace this part?

Symptoms of reverse gear deterioration include clunking or grinding noises during reverse shifting, difficulty engaging reverse gear, excessive vibration in the transmission, or inability to engage reverse gear. This part should be inspected at each seasonal inspection and replaced preventively if cracks, fractures in the teeth or irregular gear wear are observed. Performing the change preventively avoids being immobilized in port or in emergency situations where immediate reverse maneuver is required.

Equivalent manufacturer part numbers