16881-ZY6-000 Fuel Tube D - Overview. The 16881-ZY6-000 Fuel Tube D is an essential part of the Honda marine engine fuel system. It plays a critical role in delivering fuel efficiently from the tank to the engine, ensuring reliable engine performance and optimal fuel flow. This tube is designed to withstand the marine environment's challenges, including exposure to fuel and varying temperatures, to keep your Honda engine running smoothly.. Key Features. Precisely engineered fuel tube ensuring ef