How can a flooded reciprocating engine be cleared of excessive fuel?

To clear a flooded reciprocating engine of excessive fuel, the correct method involves placing the mixture control in the idle-cut-off position, turning the ignition off, fully opening the throttle, and cranking the engine.

This procedure works effectively as it eliminates the excess fuel from the combustion chamber, allowing for a better air-fuel mixture for ignition. By setting the mixture control to idle-cut-off, you are preventing any more fuel from entering the engine while cranking, which helps in clearing out any accumulated fuel. The throttle being fully open allows for greater airflow, which is necessary to help evaporate and clear the excess fuel. Cranking the engine while in this configuration can help expel the fuel that causes the flooding condition, leading to a successful restart.

The method emphasizes reducing the fuel content while maximizing the airflow through the engine, which is crucial for overcoming a flooded condition.