THICK 676-45587-00-80

Function and technical context

The 676-45587-00-80 supplement disc is a critical component in the transmission and drive chain of Yamaha engines, responsible for facilitating the transfer of motion between axles and propulsion systems. This disc acts as a coupling element and distribution of rotating forces, integrating into the mechanical assembly that guarantees efficient power transmission from the crankshaft to the propeller. Its wear or deterioration directly compromises the reliability of the propulsion, and can cause abnormal vibrations, loss of synchronization in multiple engine systems or, in advanced cases, partial blockages that seriously limit the performance of the boat.

When to replace this part?

It is recommended that the shim disc be inspected during each seasonal inspection, especially after prolonged sailing or under high load conditions. Symptoms of wear include unusual vibrations during acceleration, metallic noises in the transmission area, or reduced throttle response. Preventive replacement of this component prevents major offshore repairs and prolongs the life of the entire drive system.

Equivalent manufacturer part numbers