Daewoo G424 Gasoline Service Manual page 61

Float System
G424 Service Manual
1. Air system
Air passed through the air cleaner flows through the choke
bore and venturi into the clearance of the throttle valve and
supports idle running of the engine.
When engine speed increases to off-idle and more, intake
air is metered by the venturi. Air flow to be fed to the
cylinders is controlled by the throttle valve.
2. Float system
The float maintains a constant fuel level in the float
chamber. Fuel from the fuel tank is pumped out by the fuel
pump and filtered by the strainer. Then, fuel enters the
float chamber through a needle valve.
With entrance of fuel in the float chamber, the float moves
up gradually. At last, the float pushes the needle valve to
shut off the fuel inlet.
When the fuel level lowers, the float moves down and
releases the needle so that the fuel inlet is opened. With
repetition of up-and-down movement of the float, fuel in
the float chamber is kept at an almost constant level during
engine operation.
60 Gasoline Fuel System