Yamaha - Carburetor Float Fuel Level Control 6H4-14985-01-00. Overview. When a carburetor isn't holding a steady fuel level, everything else starts acting up. I've worked on engines that flooded out or ran lean just because the float wasn't doing its job anymore. It's a simple part, but it controls how much fuel sits in the bowl at any given time. Get that right, and the motor runs smooth and predictable again.. Key Features. Fuel Level Regulation - Maintains the correct fuel level inside the carburetor for proper operation.. Balanced Float Design - Helps ensure consistent fuel delivery across idle and throttle ranges.. OEM Precision Fit - Built to Yamaha specifications for accurate movement and sealing.. Lightweight Construction - Designed to respond quickly to fuel level changes without sticking.. Supports Smooth Operation - Helps eliminate flooding, hesitation, and uneven engine performance.. Engine & Boat Compatibility. Designed for Yamaha outboards equipped with compatible carbure