16807-ZY3-003 Plate Buffer - Overview. The 16807-ZY3-003 Plate Buffer is an essential component within Honda marine engine systems, specifically supporting the water separator system for various Honda marine engine models. This buffer plate plays a key role in absorbing vibrations and shocks, contributing to the smoother operation of the engine's fuel and water separation mechanism. Carefully designed to meet exact factory specifications, the plate buffer ensures seamless integration with existi