When the engine is warmed or hot it will not start if the choke is pulled. This means that there is more fuel and less air entering the intake manifold. 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. It restricts airflow through the carburetor. Nowadays chokes aren’t a thing anymore. 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. Once the mixture stabilizes and the engine can run on its own without air restriction, the choke is released. Once the engine is warm, push the plunger back to be all the way suppressed. Push the choke control inward. Push the manual choke in fully once the car engine reaches a normal operating temperature, usually just a few minutes. 5. During normal operation the plunger type choke will be all the way suppressed (all the way in). Release as soon as the engine starts. Push the manual choke in gradually as the car engine warms up. Set the throttle control to the desired RPM. A choke is used to create that condition. 4. A golf cart choke is commonly used when starting a cold engine to restrict air flow while the fuel gets to the engine. Repeat as required. The throttle and mixture is automatically managed, but you’ll still see the same effects. Normally the engine in Yugo runs on 900 rpm but when you pull the choke it increases to 1400. GMs used an oil pressure switch to activate the choke once the engine is running. When an engine is cold, it requires a richer Air/Fuel Mixture to get started. 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. You need to push the choke down and turn the key with a slight touch of the gas pedal. The choke is a plate or blade that covers the primary barrels. To open the choke to start a cold engine, pull up on the plunger type choke. If the engine hesitates, pull the choke control out until the engine regains its momentum, then push the choke control in again. The expression; "choke the engine" refers to placing the carburetor manual choke control into the engaged (starting) position. The choke is located before the throttle, and manages the total amount of air going into the engine. Also, GM internal regulator alternators have battery voltage at the threaded post of the alternator even when the engine is not running. In an internal combustion engine, a choke valve modifies the air pressure in the intake manifold, thereby altering the ratio of fuel and air quantity entering the engine.Choke valves are generally used in naturally aspirated engines with carburetors to supply a richer fuel mixture when starting the engine. 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. Figure 2. What Choke Does. The choke is only used when starting a cold engine. Magnum Twin Horizontal Choke Control. This provision allows a "flooded" engine to be cleared out so that it will start. The choke coil sits on the carb above the engine, so it doesn't have an accurate idea of engine temperature. The choke is a valve on the engine’s air intake that reduces the volume of air flowing into the engine on a cold start. The plunger type choke is usually found on the side of the machine or near the fuel shut off valve. 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