90552-ZV7-000 Washer, Plain (10MM) - Overview. The 90552-ZV7-000 Washer, Plain (10MM) is a crucial hardware component designed for Honda marine engine systems. This simple yet essential part plays a key role in distributing mechanical load evenly and protecting adjacent components from damage, thus ensuring reliable and safe operation of the engine assembly. It is specifically tailored to fit Honda's factory specifications for various marine engine applications, ensuring seamless compatibility a