Yamaha - Pump Diaphragm - Fuel System Component - 6R7-14541-00-00

Overview

A diaphragm might seem like a small piece, but it’s doing a lot of work every time the engine runs. I’ve seen engines struggle to stay running or lose power just because this part got stiff or worn out. When it’s fresh and flexible, fuel delivery stays consistent and the motor responds the way it should. It’s one of those maintenance items you don’t want to overlook.

Key Features

• Responsive Fuel Pump Operation – Flexes properly to maintain steady fuel movement through the system.
• OEM Fit and Function – Built to match factory specifications for reliable performance.
• Flexible Material Design – Maintains elasticity for consistent operation over time.
• Supports Engine Efficiency – Helps ensure smooth fuel delivery for stable performance.

Engine & Boat Compatibility

Designed for Yamaha outboard engines equipped with diaphragm-style fuel pumps. Commonly used across a range of Yamaha outboards where consistent fuel delivery is essential for proper engine operation.

FAQ

Q: What are signs the diaphragm is worn out?
A: Hard starting, weak fuel flow, or the engine stalling under load are common signs.

Q: Can this affect acceleration?
A: Yes, inconsistent fuel delivery can cause hesitation or poor throttle response.

Q: Does ethanol fuel impact this part?
A: Over time, ethanol can cause the material to stiffen or degrade.

Q: Should I replace this during routine maintenance?
A: It’s a good idea, especially if you’re servicing the fuel pump or noticing performance issues.

Q: Any installation tips?
A: Make sure surfaces are clean and the diaphragm is seated evenly to avoid leaks or poor operation.