Yamaha - Main Nozzle - Carburetor Fuel Metering Component - 7DH-E495H-4C-00

Overview

The main nozzle is one of those parts that really shows its impact when you’re running at higher speeds. If it’s clogged or worn, the engine just won’t pull the way it should. I’ve seen motors struggle under load or feel flat on top end just from this piece being off. When it’s clean and correct, the engine delivers smooth, steady power all the way through.

Key Features

• High-Speed Fuel Delivery – Controls fuel flow through the carburetor at mid to full throttle.
• Precision Metering Design – Engineered to deliver accurate fuel distribution for consistent performance.
• OEM Fit and Function – Matches factory specifications for proper installation and operation.
• Supports Strong Engine Output – Helps maintain smooth acceleration and reliable top-end performance.

Engine & Boat Compatibility

Designed for Yamaha outboard engines equipped with carbureted fuel systems that utilize a main nozzle for fuel delivery. Commonly used across a range of Yamaha outboards where accurate fuel metering is essential for performance under load.

FAQ

Q: What are signs the main nozzle is clogged or failing?
A: Loss of power at higher speeds, hesitation under load, or uneven acceleration are common signs.

Q: Can I clean this nozzle instead of replacing it?
A: Cleaning can work, but if performance doesn’t improve, replacement is the better option.

Q: Does this part affect fuel efficiency?
A: Yes, improper fuel delivery can lead to inefficient combustion and higher fuel consumption.

Q: How does fuel quality impact this part?
A: Dirty or old fuel can clog the nozzle and restrict proper fuel flow.

Q: Is installation difficult?
A: It requires access to the carburetor, but it’s manageable if you’re familiar with basic carb work.