Starter Motor: Description and Operation

STARTING SYSTEM COMPONENTS
The starting system has:
- Ignition switch
- Starter relay
- Neutral starting and back up switch
- Wiring harness
- Battery
- Starter motor with an integral solenoid


BOSCH STARTER OPERATION
The Bosch is a permanent magnet starter motor.
- A planetary gear train transmits power between starter motor and pinion shaft.
- The fields have six permanent magnets.

SUPPLY CIRCUIT AND CONTROL CIRCUIT
The starter system consists of two separate circuits:
- A high amperage supply to feed the starter motor.
- A low amperage circuit to control the starter solenoid.