16840-ZVL-A10 Fuel Tube A - Overview. The 16840-ZVL-A10 Fuel Tube A is an essential component in Honda marine engine fuel systems, engineered to deliver fuel efficiently and reliably. This tube connects integral parts of the fuel system, helping maintain consistent fuel flow and proper operation of the engine. Designed specifically for Honda, this part supports seamless integration with the existing fuel delivery system, ensuring your marine engine runs smoothly and efficiently.. Key Features. G