Yamaha - Diaphragm Assembly 1 - Fuel System Component - 6L2-14368-00-00

Overview

When fuel delivery starts getting inconsistent, especially on smaller carbureted Yamahas, the diaphragm is often the issue. These wear out over time from constant flexing, and once they do, the engine just won’t run right. I’ve seen motors struggle with hesitation and poor idle that came down to this exact part. Replacing it brings fuel flow back under control and gets the engine running smooth again.

Key Features

• Regulates Fuel Movement – Controls fuel flow within the system for consistent engine performance.
• Flexible Diaphragm Design – Built to respond quickly to pressure changes during operation.
• Durable Material Construction – Designed to withstand fuel exposure and repeated flexing.
• Factory-Spec Fitment – Matches Yamaha fuel system components for proper operation.
• Restores Fuel System Performance – Helps eliminate hesitation, rough idle, and uneven running.

Engine & Boat Compatibility

Designed for Yamaha outboard engines with compatible carbureted fuel systems. Commonly used across small to mid-range outboards on fishing boats, skiffs, and utility vessels. Always confirm part number compatibility before installation.

FAQ

Q: What are signs this diaphragm needs replacing?
A: Hesitation, poor idle, fuel delivery issues, or inconsistent engine performance are common signs.

Q: Can this cause the engine to stall?
A: Yes, if fuel flow isn’t regulated properly, the engine may stall or run unevenly.

Q: Is installation difficult?
A: It’s manageable if you’re comfortable working on fuel system components, just ensure proper sealing.

Q: Do I need to adjust anything after replacing it?
A: Usually no major adjustments, but checking overall fuel system operation is a good idea.

Q: Does old fuel affect this part?
A: Yes, old or contaminated fuel can cause the diaphragm material to degrade over time.