Yamaha - Main Nozzle Carburetor Fuel Metering Component 7FL-14941-2H-00. Overview. This is one of those small carb parts that can cause big headaches when it's not right. The main nozzle controls how fuel is delivered at higher throttle, so when it's clogged or worn, you'll feel it immediately out on the water. I've seen engines lose power or surge just from a dirty or damaged nozzle. Keeping this piece clean and properly sized makes a noticeable difference in how the motor pulls.. Key Features. • Precise Fuel Metering - Regulates fuel flow through the carburetor for consistent performance at mid to high throttle.• OEM Calibrated Design - Built to exact specifications for proper fuel delivery without guesswork.• Compact Critical Component - Small part with a major role in engine efficiency and throttle response.• Reliable Material Build - Designed to handle fuel exposure and resist clogging when properly maintained.. Engine & Boat Compatibility. Designed for Yamaha outboard engines equ