What does the float assembly in a carburetor control?

The float assembly in a carburetor plays a crucial role in regulating the level of fuel in the fuel bowl. It does this by using a buoyant float that rises and falls with the fuel level. When the fuel level in the bowl drops due to engine demand, the float lowers, allowing fuel to flow from the fuel tank into the bowl through the inlet valve. Conversely, when the bowl is full, the float rises and closes off the inlet valve, preventing any additional fuel from entering. This mechanism maintains the correct fuel level, ensuring that the carburetor can deliver the right amount of fuel for the engine operation. Proper fuel bowl levels are essential for optimal engine performance, as they help maintain the correct air/fuel mixture needed for efficient combustion.