Yamaha - Fuel Pump Diaphragm Fuel System Component 6C5-24471-00-00. Overview. When a motor starts acting like it's starving for fuel, even though everything else checks out, this is one of the first places I look. The diaphragm inside the fuel pump is what actually moves fuel, and once it gets stiff or worn, performance drops off quick. I've seen engines hesitate, lose power, or just not stay consistent because of it. Replacing it brings fuel delivery back to normal and keeps things running smooth.. Key Features. • Fuel Transfer Control - Moves fuel through the pump for consistent engine supply.. • Flexible Diaphragm Design - Maintains proper movement for steady fuel delivery.. • OEM Fit Accuracy - Matches Yamaha factory specs for correct installation and function.. • Fuel Resistant Material - Built to handle constant fuel exposure and engine heat.. Engine & Boat Compatibility. Verify compatibility with your specific Yamaha outboard model and part number before installation.. Replaces