16861-ZY1-010 Fuel Tube B - Overview. The 16861-ZY1-010 Fuel Tube B is a crucial component in the fuel system of Honda marine engine systems. It facilitates the delivery of fuel from the tank to the engine's fuel system, ensuring reliable operation and performance. Designed to exacting OEM standards, the fuel tube maintains optimal fuel flow and engine efficiency, contributing to smooth and consistent marine engine operation. Its sturdy construction ensures resistance to wear, prolonging service