17738-ZY3-000 Fuel Tube Plug - Overview. The 17738-ZY3-000 Fuel Tube Plug is a critical small component supporting the fuel system in Honda marine engine systems. Designed to securely seal the fuel tube, it prevents fuel leaks and maintains system integrity, essential for reliable marine engine operation. Precisely manufactured to meet Honda factory specifications, this plug integrates seamlessly with existing components to maintain optimal performance and durability.. Key Features. Precisely en