Yamaha - Diaphragm - 6BX-24411-00-00Yamaha 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. Ive seen engines hesitate, lose power, or struggle to stay running just from this piece alone. Replacing it brings the fuel system back to smooth,