An inertia variety starter: this 1 is surely an 'inboard' kind by which the Bendix gear throws the pinion toward the motor; You will also find 'outboard' kinds in which it moves the other way. The starter motor is an electric motor that turns more than or "cranks" the motor https://types-of-automotive-hose71593.theideasblog.com/27730431/detailed-notes-on-types-of-car-starters