Yamaha - Float Chamber Gasket Carburetor Sealing Component 6H4-14984-00-00. Overview. The Yamaha Float Chamber Gasket 6H4-14984-00-00 is one of those small parts that can cause big issues when it starts to fail. When it's not sealing properly, you'll usually notice fuel leaks, rough running, or inconsistent throttle response. It sits between the carburetor body and float chamber, keeping fuel contained and at the right level. If you're opening up the carb for service, this is one of those parts you replace every time without question.. Key Features. • Secure Fuel Seal - Keeps the float chamber sealed to prevent leaks and maintain proper fuel levels.. • OEM Fit Precision - Designed to match Yamaha carburetor surfaces for reliable sealing and alignment.. • Stable Engine Operation - Helps maintain consistent fuel delivery and smooth performance.. • Fuel-Resistant Material - Built to handle constant exposure to fuel and engine heat.. Engine & Boat Compatibility. • 40 1989-2005• 50 1989-200