90501-ZV5-000 Wave (40Mm) Washer - Overview. The 90501-ZV5-000 Wave (40Mm) Washer is a critical component in Honda marine engine systems, designed to provide axial tension and vibration absorption within assemblies to maintain operational reliability. This washer supports the mechanical stability of key marine engine parts, ensuring smooth operation and protection against loosening under dynamic conditions. Its wave form provides a spring-like effect, crucial in absorbing shocks and vibrations e