Why is an overrunning clutch (free-wheel clutch) fitted in the starter motor drive pinion assembly?

1. To multiply the torque output of the starter motor during cold starts.
2. To prevent the engine, once started, from driving the starter motor at dangerously high speeds and destroying its windings.
3. To align the pinion teeth with the flywheel ring gear teeth before mesh.
4. To limit the starter current draw from the battery during cranking.