Starter motor

STARTER MOTOR

Overcoming the inertia and frictions, the starter motor cranks the engine to a set number of revolutions in order to begin the formation of the mixture necessary for combustion and subsequent autonomous movement of the engine. The motion is transmitted by a direct current electric motor, powered by the battery current, through a coupling pinion which turns the ring gear on the flywheel.

1. Pinion
2. Roller type freewheel
3. Coupling lever
4. Excitation coil
5. Relay
6. Rotor
7. Flywheel
8. Ring gear

Due to a freewheel coupling, the pinion disengages when the main engine unit turns faster than the motor. A relay energized by the motor current engages the pinion through a fork. The starter motor installed is of the translating screw pinion type with relay housed directly above the starter motor.

REMOVING/REFITTING

• Remove the intake box (see GROUP 10).

1. Remove starter motor inspection cover.

1. Disconnect the electrical connections from the starter motor.
2. Remove the plastic protection from the starter motor.

1. Slacken the screw fastening the ignition coil support bracket to the crankcase.
2. Slacken the two bolts fastening the starter motor (one bolt also fastens the ignition coil support bracket).

39 ÷ 48 Nm
4 ÷ 4.9 kgm

1. Remove the starter motor.
2. Remove the spacer.