Question

The purpose of the pull-in winding in the operating solenoid of a pre-engaged starter motor is to:

Answer 1

The purpose of the pull-in winding in the operating solenoid of a pre-engaged starter motor is to facilitate flowing of high current.

This winding is connected in series with the motor.The pull -in winding is of very low resistance and hence a very high current flows which allows the motor to rotate slowly to facilitate engagement.