Free Running Test

Free Running Test:

1. Place the starter motor in a vise equipped with soft jaws and connect a fully-charged 12 Volt battery to starter motor as follows:
2. Connect a test ammeter (100-ampere scale) and carbon pile rheostat in series between the battery positive post and starter motor terminal.
3. Connect a voltmeter (15 Volt scale) across the starter motor.
4. Rotate carbon pile to full-resistance position.
5. Connect battery cable from battery negative post to starter motor body.
6. Adjust the rheostat until the battery voltage shown by the voltmeter is 1 V.
7. Confirm that the maximum amperage is within the specifications and that the starter motor turns smoothly and freely.
Current: Max. 90 Amps (Reduction drive type)