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

Designed for Yamaha outboards equipped with compatible fuel pump systems. Commonly used across small to mid-size engines found on fishing boats, skiffs, and recreational vessels. Always verify compatibility with your specific engine before installation.

FAQ

Q: What are signs a diaphragm is failing?
A: Hard starting, engine stalling, or loss of power—especially at higher speeds—are common signs.

Q: Can ethanol fuel affect this part?
A: Yes, ethanol can cause the material to stiffen or degrade over time, reducing performance.

Q: Should I replace this with a full fuel pump kit?
A: If other components show wear, a full rebuild kit is usually the better long-term fix.

Q: Is installation complicated?
A: Not usually, but you’ll want to keep everything clean and properly aligned during assembly.

Q: How often should this be replaced?
A: It depends on use, but regular inspection during fuel system service is a good practice.