In muzzle carburetor (usually facing out) there is a hole. Each hole has a different function.
Seen in the picture above there are 4 small holes and 1 hole venturi (closed skepticism). HAVE you analyze the function of the hole? Are decoration or whether important function? Adheres to the principles of physics, the manometer with venturi meters, the hole is an air duct so that the pressure in the carburetor bowl is higher than in the venturi hole.
This causes the fluid rises and mixes with the air in the combustion chamber to the suction. The hole is:
1 Towards ACV.
2 Towards piston choke / choke.
3 Towards Jet Pilot.
4 Towards Main Jet.
