YAMAHA SCREW 90105-08M36

Function and technical context

This fixing screw is part of the critical structural elements of the Yamaha engine, ensuring the mechanical union of vital components in the engine block or auxiliary systems of the engine. Its correct tightening guarantees the tightness and structural integrity of the assembly, avoiding unwanted vibrations and pressure loss in the internal circuits of the engine. Failure of this fastening element can lead to misalignments, entry of water into prohibited areas or catastrophic loosening of critical components during navigation, compromising the safety of the boat.

When to replace this part?

Motor screws subjected to continuous thermal cycles and vibration can lose their tightening capacity after years of operation, presenting symptoms such as abnormal vibrations, microleaks around the fixing area or visible deterioration of the galvanized coating. It is recommended to inspect all engine fastening elements during each seasonal maintenance, and preventively replace those that show advanced corrosion, deformation or loss of tension. Early replacement of worn screws prevents costly emergent repairs at sea and prolongs the operational reliability of the thruster.

Equivalent manufacturer part numbers