Yamaha Carburetor Assy 3 | Fuel Delivery Component | 688-14303-40-00

Overview

If your Yamaha is starting to idle rough or hesitate when you get on the throttle, the carburetor is usually where things start to break down. I’ve worked on plenty of these where cleaning only goes so far, and a full replacement is what really brings the engine back. This assembly helps restore that smooth, predictable feel when you’re running or coming up on plane. Once it’s in place, the engine tends to settle in and run the way it was meant to.

Key Features

• Balanced Fuel and Air Delivery – Provides the correct mixture for consistent combustion and engine operation.
• Genuine Yamaha Fitment – Matches factory specifications for proper alignment and function.
• Improved Throttle Response – Helps restore smooth acceleration and steady engine behavior.
• Marine-Ready Construction – Built to handle vibration, fuel exposure, and harsh conditions.
• Direct Replacement Assembly – Installs in place of the original carburetor with proper fitment.

Engine & Boat Compatibility

Compatible with select Yamaha outboards using carburetor assembly 688-14303-40-00. Verify fitment based on your specific engine model.

FAQ

Q: What are signs this carburetor needs replacing?
A: Rough idle, hesitation on throttle, or loss of power are common signs.

Q: Can I rebuild instead of replacing it?
A: Sometimes, but if internal wear or damage is present, replacement is usually more reliable.

Q: Will this improve how the engine runs?
A: Yes, especially if your current carburetor isn’t delivering fuel consistently.

Q: Is installation difficult?
A: It’s manageable if you’ve done basic engine work, just take your time with setup.

Q: How does saltwater use affect this part?
A: Over time, buildup and corrosion can impact performance without proper maintenance.

• Supersessions
  688-14303-08-00, 688-14303-41-00, 688-14303-42-00, 688-14303-42-00