How is a flooded engine, equipped with a float-type carburetor, cleared of excessive fuel?

The appropriate method for clearing a flooded engine equipped with a float-type carburetor involves shutting off the fuel flow, opening the throttle, and cranking the engine. This technique is effective because shutting off the fuel prevents additional fuel from entering the carburetor and cylinder, thereby addressing the excessive fuel situation. By opening the throttle, the mixture of fuel and air is adjusted to allow for easier starting and to help clear some of the excess fuel from the combustion chamber. Cranking the engine allows the fuel that has previously flooded the engine to be expelled, facilitating a better chance of ignition once the flooding is resolved.

The other methods do not effectively address the flooding scenario as directly. Increasing engine RPM while cranking doesn't alleviate the flooded condition and can lead to further flooding if fuel continues to enter the engine. Keeping the mixture control full rich is counterproductive as it would introduce more fuel into an already flooded condition. Turning off the engine and waiting does not actively clear the flooding; it simply delays the start-up process without addressing the underlying cause of excess fuel in the engine.