16870-ZY3-010 Fuel Tube - Overview. The 16870-ZY3-010 Fuel Tube is a critical component of the Honda marine engine fuel system, responsible for ensuring a seamless supply of gasoline to maintain engine efficiency and performance. This genuine OEM replacement part is engineered to Honda's exact factory specifications, ensuring it fits perfectly within the fuel delivery system and integrates flawlessly with existing components. Its precise design guarantees reliable fuel flow, contributing to the