YAMAHA WASHER 90201-17682 REC90201-17682

Function and technical context

This washer intervenes in critical fastening and sealing systems in Yamaha and Mercury marine engines, guaranteeing the correct tightening and distribution of loads in connection points subjected to constant vibrations and temperature changes. Its function is to prevent the fastening elements from loosening due to the action of the engine and waves, in addition to acting as a sealing element in assemblies that require airtightness. The wear or loss of this part compromises the structural integrity of the area where it is installed, and may cause coolant leaks, water entry into engine cavities or detachment of critical components during navigation.

When to replace this part?

Washers degrade due to marine corrosion, permanent deformation after initial tightening, and brittleness after repeated temperature and humidity cycles. It is recommended to check its condition during each seasonal maintenance and replace preventively if signs of rust, flattening or visible cracks are observed. Changing these parts systematically during repairs in areas where they operate is a prudent practice that avoids engine reopenings and costs associated with secondary leaks.

Equivalent manufacturer part numbers