Malibu V6-191 3.1L VIN M SFI (1997)
Starter Motor: Description and Operation
PG260 Starter Motor Assembly (Typical)
The PG260 starter motor features small permanent magnets mounted inside the field frame and a planetary gear reduction mechanism between the
armature and drive. A permanent magnet gear reduction motor is about half the weight and size of a field coil motor having the same cranking
performance. The drive housing encloses the shift lever, the shift lever mechanism, and the solenoid plunger to protect them from exposure to dirt, icing
conditions, and splash.
When the ignition switch is moved to the start position, battery voltage is sent to the starter solenoid contacts. This will energize the solenoid windings
and cause movement of the solenoid plunger and shift lever which causes the drive pinion to engage the engine flywheel ring gear and the solenoid
switch contacts to close. When the solenoid switch contacts close, the starter motor is energized and cranking takes place. As the engine starts, the pinion
overrun clutch protects the motor armature from excessive speed until the ignition switch is opened. Once the solenoid windings are de-energized, the
return spring causes the pinion to disengage. To prevent excessive overrun. the ignition switch should he opened immediately when the engine starts.
