Yamaha - Diaphragm - Fuel System Component - 6J8-24471-00-00

Overview

When a fuel system starts acting up—hard starting, uneven idle, or weak throttle response—a worn diaphragm is often behind it. It’s a small part, but it controls how fuel moves through the system, so when it gets stiff or damaged, performance drops off fast. I’ve replaced plenty of these and it’s one of those fixes that immediately smooths things out. Keep it fresh, and your motor will run the way it’s supposed to.

Key Features

• Consistent Fuel Regulation – Controls fuel flow for stable engine operation.
• Flexible Material Design – Responds quickly to pressure changes for efficient performance.
• Durable Construction – Built to handle fuel exposure and repeated movement over time.
• Factory-Spec Fitment – Designed to match Yamaha fuel system components for proper sealing.
• Restores Engine Performance – Helps eliminate hesitation, rough idle, and poor fuel delivery.

Engine & Boat Compatibility

Designed for Yamaha outboard engines with compatible fuel pump or carburetor 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 is failing?
A: Hard starting, weak fuel delivery, or rough idle are common indicators.

Q: Can this cause fuel leaks?
A: Yes, a damaged diaphragm can allow fuel to leak or flow improperly.

Q: Is this a common wear item?
A: It is, especially in engines that see regular use or sit with old fuel.

Q: Is installation difficult?
A: It’s usually straightforward if you’re already accessing the fuel system components.

Q: Does fuel quality affect diaphragm life?
A: Yes, clean, fresh fuel helps extend its lifespan and maintain performance.