Starter Motor: Description and Operation

Starting Motor Circuit Description
- The magnetic switch coils are magnetized when the ignition switch is closed.
- The resulting plunger and pinion drive lever movement causes the pinion to engage the engine flywheel gear and the magnetic switch main contacts to close, and cranking takes place.
- When the engine starts, the pinion over-running clutch protects the armature from excessive speed until the switch is opened, at which time the return spring causes the pinion to disengage.




Starting Motor Components
The starting motor consists of parts shown and has permanent magnets mounted in starting motor yoke (frame).

The magnetic switch assembly and parts in the starting motor are enclosed in the housings so that they will be protected against possible dirt and water splash.

NOTE:
- Make sure to apply grease before assembly where so indicated "A" in the figure.
- Spare parts have been lubricated.