Yamaha - Fuel Pipe Joint Assembly 1 Fuel System 6E5-24304-20-00. Overview. Fuel delivery issues don't always come from the big components-sometimes it's the small connection points that cause the trouble. This joint keeps fuel moving cleanly between sections of the system, and when it wears or loosens up, you can get leaks or air sneaking in. I've chased rough-running engines back to something as simple as a bad joint like this. Getting a solid connection here helps keep everything running smooth and predictable.. Key Features. Leak-Free Fuel Connection - Ensures a secure path for fuel flow between system components.. Air Intrusion Prevention - Helps maintain proper fuel pressure by keeping air out of the line.. Durable Fuel-Safe Construction - Built to handle constant exposure to fuel and engine vibration.. Exact OEM Fitment - Designed to match original specifications for proper alignment and installation.. Engine & Boat Compatibility. Designed for Yamaha 2-stroke outboard engines wit