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 systems. Commonly used on smaller horsepower motors found on skiffs, jon boats, and lightweight fishing setups.

FAQ

Q: What are signs this diaphragm needs replacing?
A: Rough idle, hesitation, or inconsistent fuel delivery are common indicators.

Q: Can a bad diaphragm cause the engine to stall?
A: Yes, especially at low speeds where steady fuel flow is critical.

Q: Should I replace this during fuel pump service?
A: It’s a good idea, especially if the engine has a lot of hours on it.

Q: Does old fuel affect the diaphragm?
A: Yes, stale fuel can cause it to stiffen or degrade faster over time.

Q: Is installation difficult?
A: It’s manageable if you’re comfortable opening and reassembling the fuel pump carefully.