Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Free Running Test

1. Place starter in a suitable soft jawed vise.

Free Running Test:





2. Connect a fully charged 12 volt battery, ammeter and voltmeter to starter motor as shown in Fig. 8 using a suitable 0-100 amperage ammeter, voltmeter and carbon pile rheostat.
3. Rotate carbon pile rheostat to full resistance position.
4. Adjust rheostat until battery voltage shown on the voltmeter matches free running test voltage listed under Starter Specifications.
5. Confirm that the maximum amperage is as indicated under Starter Specifications chart in this section, ensuring starter motor turns smoothly and freely.