Starter motor

• 1, Engagement lever
• 2, Electro-magnet
• 3, One-way coupling
• 4, Pinion
• 5, Control mechanism
• 6, Field winding
• 7, Permanent magnet

The starter motor is the direct current type with series winding. It features a high torque to give the initial impulse to the engine and a high rotation speed to support the increase in speed.

When the ignition is turned on the motor windings are supplied, producing electro-magnetic forces which cause the motor pinion to rotate. At the same time, the solenoid is energized and operates the engagement mechanism for the flywheel ring gear

pinion turning over the engine.

The one-way coupling allows the engine speed to increase even when the pinion is already engaged.