Yamaha - Fuel Pipe 1 Fuel Delivery Line 6H4-24311-00-00. Overview. Fuel delivery issues can be tricky, and sometimes it comes down to something as simple as a line not doing its job. I've seen engines run rough or struggle at higher throttle just because of a restricted or aging fuel pipe. It's not a flashy part, but it's critical to keeping fuel moving cleanly through the system. When everything flows the way it should, the motor just runs better-plain and simple.. Key Features. Direct Fuel Routing - Transfers fuel between key components in the engine's fuel system.. Consistent Flow Support - Helps maintain steady fuel delivery for smooth engine operation.. OEM Fitment Design - Built to Yamaha specifications for proper connection and routing.. Durable Construction - Designed to handle fuel exposure, heat, and vibration over time.. Leak-Resistant Performance - Supports secure connections to help prevent fuel loss.. Engine & Boat Compatibility. Designed for Yamaha outboards equipped wit