MOTHS 99999-02808

Function and technical context

Wing nuts are small fixing and positioning components that work on various Yamaha marine engine systems, ensuring that mechanical parts remain aligned and secured during operation. These parts intervene in the correct functioning of critical systems such as the transmission, cooling and ignition system, avoiding unwanted movements of components under vibration and pressure. If a wing nut becomes detached, loose or corroded, it can cause misalignment in the parts it holds, resulting in irregular engine operation, increased vibrations and, in severe cases, cascading damage to other mechanical components.

When to replace this part?

It is advisable to inspect and replace the wing nuts when symptoms such as visible loosening, marine corrosion, deformation or total loss of the part are detected. Although they do not have a fixed maintenance interval like filters, it is recommended to check their condition during each seasonal maintenance or after sailing in salt waters, where corrosion acts more quickly. Replacing them preventively, especially if they show rust or damage, avoids unpleasant surprises during navigation and protects the structural integrity of the engine.

Equivalent manufacturer part numbers