Yamaha - Diaphragm Fuel Pump System 6E0-24411-00-00. Overview. This is one of those small parts that can quietly affect how your engine runs. The diaphragm works nonstop inside the fuel pump, and once it starts to wear out, fuel delivery gets inconsistent pretty quickly. I've seen engines that wouldn't idle right or struggled under load, all traced back to a worn diaphragm. Replacing it is a simple step that brings the fuel system back to smooth, reliable operation.. Key Features. Consistent Fuel Flow Control - Maintains steady fuel delivery through the pump for reliable performance.. Flexible Rubber Design - Built to handle constant pulsing without losing effectiveness too quickly.. Fuel-Resistant Material - Designed to withstand long-term exposure to gasoline and additives.. OEM Fit and Seal - Matches original specifications for proper installation and dependable sealing.. Engine & Boat Compatibility. Designed for Yamaha 2-stroke outboard engines using diaphragm-style fuel pump syste