Yamaha - Diaphragm - Fuel Pump Component - 677-24471-01-00

Overview

When fuel delivery starts getting inconsistent, especially at idle or low speeds, the diaphragm is often the root of the issue. It flexes with pressure changes to move fuel through the system, and once it stiffens or wears out, performance drops off. I’ve replaced a lot of these where engines were surging or struggling to stay steady. When it’s in good condition, fuel flow smooths out and the engine runs clean.

Key Features

• Fuel Pump Function – Moves fuel through the system using pressure changes.
• Genuine Yamaha Fitment – Designed to match factory fuel pump specifications precisely.
• Flexible Diaphragm Design – Responds to pressure for consistent fuel delivery.
• Supports Engine Stability – Helps reduce surging and uneven performance.
• Durable Material Construction – Built to handle fuel exposure and repeated flex cycles.

Engine & Boat Compatibility

Compatible with select Yamaha outboards using this diaphragm. Verify fitment based on your specific engine model.

FAQ

Q: What are signs of a worn diaphragm?
A: Engine surging, poor fuel delivery, or difficulty maintaining steady operation.

Q: Can this affect engine performance?
A: Yes, it directly impacts how fuel is delivered to the engine.

Q: Is this part part of the fuel pump?
A: Yes, it’s a key internal component of the fuel pump system.

Q: Should this be replaced during maintenance?
A: It’s recommended if there are signs of wear or reduced performance.

Q: Is installation difficult?
A: It’s manageable with basic mechanical experience and careful assembly.