DIABOLO 688-45331-00-94 REC688-45331-00-94

Function and technical context

The diabolo is an essential component in the Yamaha engine transmission system, responsible for transmitting and distributing the engine's power to the propeller and other propulsion systems. It acts as a coupling element in the kinematic chain, allowing the rotary motion of the crankshaft to be efficiently transferred to the output shaft. Its correct operation is essential to guarantee smooth and vibration-free propulsion, avoiding secondary damage to adjacent bearings and mechanical seals. A worn or damaged diabolo causes loss of power output, increased vibrations during navigation and the risk of sudden propeller blockage.

When to replace this part?

The most common symptoms of wear on the diabolo include abnormal vibrations during acceleration, friction noises in the transmission area and gradual loss of propulsive efficiency. It is recommended that this part be inspected during each seasonal inspection or annual maintenance, especially on heavily used boats or in silty waters. The preventive replacement of the diabolo prevents unexpected breakages during navigation and prolongs the useful life of the rest of the transmission components.

Equivalent manufacturer part numbers