Free Running Test
- Place the starter motor in a vise equipped with soft jaws and connect a fully-charged 12-volt battery to starter motor as follows:
- Connect a test ammeter (100-ampere scale) and carbon pile rheostat as shown in Fig 1.
- Connect a voltmeter (15-volt scale) across the starter motor.
- Rotate carbon pile to the off position.
- Connect the battery cable from battery's negative post to the starter motor body.
- Adjust the carbon pile until battery voltage shown on the voltmeter reads 11 volts.
- Confirm that the maximum amperage is within the specifications and that the starter motor turns smoothly and freely:
Current : Max. 90 Amps
Speed : Min. 2,800 RPM