16850-ZY9-E01 Fuel Tube A - Overview. The 16850-ZY9-E01 Fuel Tube A is an essential component of the Honda marine engine fuel system. It is designed to ensure the reliable and efficient delivery of fuel from the tank to the engine, supporting seamless operation of Honda marine engines. Manufactured according to stringent factory specifications, this fuel tube ensures optimal performance and durability, fitting perfectly within the existing engine rigging setup.. Key Features. Genuine OEM fuel tu