Phases of Starter Operation

Fig 1: View Of Starter At Rest

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Starter at rest, no current supplied. 

Pull-in and hold-in winding energized.

Pinion tooth meets gap in ring gear and meshes.

Fig 2: Identifying First Phase Of Starter Operation

Courtesy of BMW OF NORTH AMERICA, INC.

Starter position just before Main current is switched on. 

Engaging lever in end position.

Pull-in winding released.

Pinion meshed.

Main current flows.

Engine is rotated.

Fig 3: View Of Starter Operation

Courtesy of BMW OF NORTH AMERICA, INC.

Engine is cranked.