Yamaha Diaphragm Assy 2 - Fuel System Component - 67C-14369-00-00

Overview

When fuel delivery starts getting inconsistent, especially on smaller Yamaha setups, the diaphragm is often the culprit. This part moves with pressure changes to help regulate fuel flow, 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 fresh, fuel flow smooths out and the engine runs the way it should.

Key Features

• Fuel Flow Regulation – Controls fuel movement through the system for consistent delivery.
• Genuine Yamaha Fitment – Designed to match factory fuel system components precisely.
• Flexible Diaphragm Design – Responds to pressure changes for smooth operation.
• Supports Engine Stability – Helps maintain steady performance and reduce surging.
• Durable Material Construction – Built to handle fuel exposure and repeated flex cycles.

Engine & Boat Compatibility

Compatible with select Yamaha outboards using this diaphragm assembly. 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 plays a direct role in regulating fuel flow to the engine.

Q: Should I replace this during fuel system service?
A: It’s a good idea if there are any signs of wear or stiffness.

Q: Is this the latest version of this part?
A: No, this part has been superseded by 67C-14369-01-00.

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

• Supersessions
  67C-14369-01-00, 67C-14369-01-00