Yamaha - Lower Carburetor Assembly - Fuel Delivery Component - 64D-14303-00-00

Overview

On these multi-carb Yamaha setups, the lower carburetor plays a key role in keeping the engine running balanced from top to bottom. When it starts to clog or wear out, you’ll feel it in uneven idle or hesitation under load. This lower carburetor assembly is built to restore proper fuel flow and keep the engine running smooth across all cylinders. It installs clean and helps bring back consistent throttle response.

Key Features

• Lower Cylinder Fuel Control – Delivers fuel to the lower cylinder for balanced engine operation.

• Improved Engine Smoothness – Helps eliminate hesitation and uneven running.

• OEM Yamaha Fitment – Built to factory specifications for proper alignment and function.

• Durable Marine Construction – Designed to handle fuel exposure and harsh marine conditions.

Engine & Boat Compatibility

• Compatible with select Yamaha outboards that utilize this lower carburetor assembly (confirm fitment by model and year)

FAQ

Q: What makes the lower carburetor different?
A: It feeds fuel specifically to the lower cylinder, helping maintain balanced engine performance.

Q: What are signs it needs replacing?
A: Rough idle, hesitation, or uneven power delivery can indicate issues.

Q: Can I replace just this carburetor?
A: Yes, but all carburetors should be in similar condition for best results.

Q: Will this fix uneven engine performance?
A: If the issue is fuel delivery from this carburetor, it can significantly improve it.

• Supersessions
  64D-14303-01-00, 64D-14303-02-00, 64D-14303-02-00