16620-ZY9-010 Fuel Line - Overview. The 16620-ZY9-010 Fuel Line is an essential component of the Honda marine engine fuel system. It functions as a conduit for transferring fuel from the tank directly to the engine's fuel injection system, facilitating efficient engine operation. As a critical link in the fuel delivery chain, the fuel line ensures consistent fuel flow, supporting engine performance and reliability. Designed to integrate seamlessly with Honda marine engine systems, it ensures opt