Starter Motor: Description and Operation

MITSUBISHI GEAR REDUCTION STARTERS

Exploded View Of Mitsubishi Starter:

These starters are 12 volt units that have the solenoid mounted on the starter housing. The solenoid is energized when starter relay contacts are closed causing starter drive to engage with flywheel ring gear, thereby starting the engine. An overrunning clutch in the drive protects starter from excessive speeds once engine starts. The current flows through solenoid energizing coil until solenoid plunger is at full travel, at which time plunger closes a set of contacts that bypass the energizing coil, allowing the holding coil to keep starter drive engaged and passing starting current to the starter.

The gear reduction starter motor is a compact-type starter that uses an integral starter solenoid. With a gear reduction system, the starter motor is relatively small but still provides the necessary torque to crank the engine.