What is the purpose of the inlet needle in a carburetor?

The purpose of the inlet needle in a carburetor is to allow fuel to enter the float bowl as fuel is consumed. This component plays a crucial role in maintaining the proper fuel level within the float bowl, which is essential for the carburetor's functionality. When the engine is running, fuel is drawn from the float bowl to mix with air for combustion. As fuel is consumed, the level in the float bowl decreases. The inlet needle, which is typically attached to a float mechanism, opens to allow more fuel to enter the bowl from the fuel supply. Once the float rises to a certain level, it pushes the needle back into place, sealing off the fuel flow to prevent overflow. This regulation of fuel levels ensures a consistent air-fuel mixture and helps maintain engine performance.