If the engine hesitates, pull the choke control out until the engine regains its momentum, then push the choke control in again. Set the throttle control to the desired RPM. The choke coil sits on the carb above the engine, so it doesn't have an accurate idea of engine temperature. A choke unloader is a linkage arrangement that forces the choke open against its spring when the vehicle's accelerator is moved to the end of its travel. Push the manual choke in fully once the car engine reaches a normal operating temperature, usually just a few minutes. The choke is a plate or blade that covers the primary barrels. GMs used an oil pressure switch to activate the choke once the engine is running. Figure 2. The throttle and mixture is automatically managed, but you’ll still see the same effects. A choke is used to create that condition. The choke is only used when starting a cold engine. Once the engine is warm, push the plunger back to be all the way suppressed. Listen to the engine after each adjustment to hear the choke’s effect on the engine to determine the correct choke position for a smooth noise. The expression; "choke the engine" refers to placing the carburetor manual choke control into the engaged (starting) position. The manual choke control system allows the small engine equipment operator to temporarily adjust the fuel to air mixture and makes starting an engine that has not been used for a considerable length of time easier. Once the mixture stabilizes and the engine can run on its own without air restriction, the choke is released. You need to push the choke down and turn the key with a slight touch of the gas pedal. Normally the engine in Yugo runs on 900 rpm but when you pull the choke it increases to 1400. On a cold day, and especially on a windy day, the cold air will fully close the choke after the engine is shut off, and while it is still warm. During normal operation the plunger type choke will be all the way suppressed (all the way in). 5. The choke is located before the throttle, and manages the total amount of air going into the engine. When an engine is cold, it requires a richer Air/Fuel Mixture to get started. A golf cart choke is commonly used when starting a cold engine to restrict air flow while the fuel gets to the engine. What Choke Does. This provision allows a "flooded" engine to be cleared out so that it will start. The plunger type choke is usually found on the side of the machine or near the fuel shut off valve. Push the manual choke in gradually as the car engine warms up. When the engine is warmed or hot it will not start if the choke is pulled. It restricts airflow through the carburetor. This means that there is more fuel and less air entering the intake manifold. 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