What does the MOTOR position on the ENG Start Selector achieve?

The MOTOR position on the ENG Start Selector is specifically designed for manual motor operation of the engine. In this mode, the engine can be turned over without fuel being injected, which is essential for a variety of operational checks or procedures, such as clearing a flooded start or performing maintenance tasks where engine operation is necessary, but actual combustion should not occur.

This functionality allows the crew to ensure the engine’s condition without risking an engine start. It serves as a crucial step in scenarios where the engine needs to be checked or operated without the complications arising from combustion, thus enhancing safety and operational control.

The other functionalities represented by the other options do not accurately reflect the role of the MOTOR position. For instance, starting the engine automatically would imply a different setting entirely. Similarly, preparing the engine for full power would not align with the MOTOR position, which intentionally inhibits fuel flow. Activating the thrust reverser is also unrelated to the ENG Start Selector positions.