YAMAHA PIONEER 68D-E3102-00 PAF4-04050100

Function and technical context

The 68D-E3102-00 sprocket is an essential component of the transmission system in Yamaha outboard engines, responsible for transferring power from the crankshaft to the propeller through the tail gear. This small bevel gear works under conditions of high load and continuous friction, supporting intense torsional stresses during acceleration and engine maneuvers. Its progressive wear directly affects the efficiency of the propulsion and can cause excessive play in the transmission, loss of acceleration and, in serious cases, failures in the power transmission that compromise the navigability of the boat.

When to replace this part?

The transmission sprockets usually show progressive wear manifested as metallic noises or squeaks in the tail area of the engine, especially under strong acceleration, or as a sensation of play or abnormal play when changing gears. Although there is no universal fixed service interval, it is recommended to inspect the condition of the pinion during each seasonal maintenance, especially on boats with intensive use or after sailing in difficult conditions. Preventive replacement prevents a worn pinion from irreversibly damaging the tail gear and gearbox, interventions that are much more expensive and complex than changing the pinion.

Equivalent manufacturer part numbers