94101-10800 Plain (10mm) Washer - Overview. The 94101-10800 Plain (10mm) Washer is an essential hardware component for Honda marine engine systems. It serves as a simple, unthreaded metal ring designed to evenly distribute load under bolt or screw heads, thereby preventing damage to connected parts and ensuring secure fastening. This washer supports various rigging and accessory assemblies within the marine engine systems, guaranteeing reliability and extended equipment life.. Key Features. Genu