What happens if the manual mixture control is moved to the idle cutoff position in a pressure injection carburetor?

When the manual mixture control is moved to the idle cutoff position in a pressure injection carburetor, the flow of fuel to the engine is completely shut off. This action effectively prevents any fuel from reaching the combustion chambers, which leads to the engine shutting down.

In a pressure injection system, the carburetor relies on a mixture of air and fuel for combustion. By placing the mixture control in the idle cutoff position, the fuel delivery mechanism is interrupted, making it impossible for the engine to continue running. As a result, the engine will stop due to the lack of fuel necessary for combustion.

This system is designed to provide better control over the mixture and to ensure that fuel is not wasted or unintentionally allowed to flow when the engine is meant to be idle or shut down.