16861-ZW9-000 Fuel Tube B - Overview. The 16861-ZW9-000 Fuel Tube B is a vital fuel delivery component within Honda marine engine systems. It supports the fuel system by routing fuel efficiently from the tank to the engine, ensuring reliable engine operation and optimal performance. Designed with precision, this genuine Honda OEM part guarantees seamless integration with existing parts and seals, maintaining durability and reliability expected from factory specifications.. Key Features. Genuine