Yamaha - Fuel Pump Diaphragm Fuel System Component 6BX-24411-00-00. Overview. When fuel delivery starts getting inconsistent, this is one of the small parts that can make a big difference. The diaphragm is what actually moves fuel through the pump, and when it gets stiff or worn, performance drops off fast. I've seen engines hesitate, lose power, or struggle to stay running just from this piece alone. Replacing it brings the fuel system back to smooth, steady operation.. Key Features. • Fuel Transfer Function - 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 operation.. • 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.. FAQs. Q1: What are signs the diaphra