16700-ZW5-004 Fuel Pump Assembly - Overview. The 16700-ZW5-004 Fuel Pump Assembly is a critical component of the fuel system in Honda marine engine systems. Its primary role is to deliver fuel consistently and at the required pressure from the fuel tank to the engine, ensuring smooth operation and optimal performance. Engineered as a genuine OEM part, this fuel pump assembly ensures seamless integration with existing parts, maintaining reliable fuel supply and engine efficiency in Honda outboard