Repair and Diagnosis: Electrical: Starter: Starters: Description

The starter motor consists of four series parallel fields, four brushes and a solenoid shifted, overrunning clutch. The motor is available in two models. The 1.5 HP model is used on 225" and 318" engines. It has a gear reduction of 3.5-1. The 1.8 HP model is used on all other engines and has a 2.0-1 gear reduction. The two motors seem identical in appearance, but there are both external and internal differences. The field frame assembly, armature, and shifter fork are larger in the 1.8 HP model. Also, the 1.8 HP model has a shock absorber clutch drive unit which absorbs the initial shock of cranking and protects the clutch unit if engine backfires during cranking. The starter system consists of two separate circuits: the supply circuit which provides the heavy current to the motor, and the control circuit which actuates the solenoid. Unless otherwise noted, service and testing procedures are the same for both models.