16850-ZV7-900 Fuel Tube - Overview. The 16850-ZV7-900 Fuel Tube is a vital component in Honda marine engine fuel systems. This fuel tube is responsible for the critical task of transferring gasoline from the fuel tank to the engine, ensuring smooth and efficient fuel flow. As part of the fuel system, it plays an essential role in maintaining engine performance and reliability over time. Designed as a genuine Honda OEM part, it guarantees a perfect match to factory specifications, dimensions, and