16735-ZZ5-003 Fuel Pump Unit - Overview. The 16735-ZZ5-003 Fuel Pump Unit is an essential component in Honda marine engine systems, specifically engineered to support the fuel delivery system. Its primary role is to draw fuel from the tank and deliver it under pressure to the engine, facilitating efficient combustion and reliable engine performance. Designed to meet strict factory specifications, this unit ensures seamless integration with existing parts, maintaining optimal performance and dura