Yamaha - Main Nozzle Carburetor Fuel Metering Component 7CR-1495S-6B-00. Overview. Main nozzles are one of those small parts that can completely change how an engine runs. I've seen engines struggle under load or feel flat on the top end just because the nozzle wasn't right anymore. When it's clean and properly sized, the motor pulls strong and stays consistent through the throttle range. It's a simple piece, but it plays a big role in how the engine performs out on the water.. Key Features. • Precise Fuel Metering - Controls fuel delivery at higher throttle for smooth power output.• Optimized Performance Flow - Supports consistent engine response under load.• OEM Fit and Calibration - Matches factory specifications for proper carburetor function.• Durable Construction - Built to withstand fuel exposure and long-term use.. Engine & Boat Compatibility. Designed for Yamaha outboard engines equipped with carbureted fuel systems. Commonly used across a range of Yamaha outboards where accur