DOCK 90501-10M77

Function and technical context

The 90501-10M77 spring is a suspension and damping component that is part of the anchoring and stabilization system of Yamaha, Mercury and other manufacturers marine engines. This spring works in the engine mounting bracket, absorbing vibrations and movements transmitted by the propulsion, allowing the engine block to stabilize while driving and in different navigation conditions. Its correct operation is essential to guarantee the alignment of the drive shaft, avoid damage to the structure of the boat and prolong the useful life of other components of the drive train.

When to replace this part?

The spring should be inspected regularly during seasonal maintenance operations, especially if you notice abnormal vibrations in the cabin, visual shifting of the engine to the sides, or rubbing noises in the mounting brackets. These symptoms indicate loss of elasticity or permanent deformation of the spring. It is recommended to carry out a complete inspection of the supports after each season of intensive navigation or when between 2 and 3 years have passed since the last replacement, since exposure to salt, temperature changes and constant vibrations accelerate the aging of the material. Preventative replacement prevents more serious engine alignment problems and reduces the risk of costly offshore repairs.

Equivalent manufacturer part numbers