I think you may have misunderstood 53moneypit. Operation of the starter on 12V will cause the starter to heat up rather quickly if the vehicle doesn't start easily. You can drive it around till you run out of gas and it won't damage the starter from normal engine heat.

1953 Chevrolet 3600
Fried Green T'mater (Vern)
In the Stovebolt Gallery
Caution: Political Statement
Man who runs in front of car gets tired, man who runs behind car gets exhausted.