90509-ZVA-000 Washer (32mm) - Overview. The 90509-ZVA-000 Washer (32mm) is a critical component in Honda marine engine systems. It functions primarily as a flat, plain washer that supports load distribution and spacing within various mechanical assemblies. This washer plays a vital role in ensuring the reliable operation of Honda marine engines by providing proper mounting and sealing alignment. Designed as an OEM genuine Honda part, it matches factory specifications, ensuring seamless integrati