Yamaha - Fuel Pump Diaphragm Fuel Delivery Component 6H3-24411-10-00. Overview. When a motor starts starving for fuel or won't stay running at idle, I usually start looking at the fuel pump-and the diaphragm is often the culprit. It's a small piece, but it does a lot of work every time the engine cycles. Over time, they stiffen up or wear out, especially with today's fuel. Replacing it is one of those simple fixes that can make a big difference in how the motor runs.. Key Features. Pulse-Driven Fuel Movement - Uses engine pressure pulses to move fuel consistently through the system.. Flexible Response Material - Designed to flex reliably for steady fuel delivery during operation.. OEM Fit and Function - Built to Yamaha specifications for proper sealing and performance.. Restores Fuel Pump Efficiency - Helps eliminate fuel starvation and uneven engine behavior.. Service-Ready Component - Ideal replacement during routine fuel pump maintenance or rebuilds.. Engine & Boat Compatibility. De