1. Air enters the carburetor through the engines air intake system
2. How much air enters the carburetor depends on the setting of the choke, which covers the valve the more open the choke is, the more air can enter3. The air is pushed through an opening that narrows called the venturi.
8. When the throttle is closed and the engine is idling, there is a secondary valve called the idle valve on the outside of the throttle valve
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+86-131 7361 0502