Yamaha - Fuel Pipe 1 Fuel Delivery Component 7DX-F4311-00-00. Overview. Fuel pipes are one of those parts you don't notice until something feels off on the water. If there's a small crack or restriction, the engine can start acting up fast-hesitation, uneven power, or hard starts. I've seen plenty of issues traced back to worn fuel lines that looked fine at first glance. A solid, properly fitted pipe keeps fuel moving clean and steady, which is exactly what you want when you're running.. Key Features. • Consistent Fuel Flow - Delivers steady fuel transfer to support smooth engine performance.• OEM Material Construction - Built to handle fuel exposure, pressure, and marine conditions.• Precision Fit Routing - Matches factory layout for clean installation and proper alignment.• Leak Prevention Design - Helps keep air out and fuel contained within the system.. Engine & Boat Compatibility. Designed for Yamaha outboard engines that require a direct-fit fuel pipe within the fuel delivery sys