I am hoping that someone can help out with this. I am having extreme difficulty getting my old 52 caddy started. It is an original 65K mile car with the original 331V8. It is a 6 volt car that has had the starting circuit changed to 12 volt. I just had the starter rebuilt by a shop near my home in So Cal. I had it rebuilt because the armature was grounding out on itself and the starter would not turn over any more.

I get it back and the only thing that will work is the solenoid. It hits hard but the starter will not turn the motor over. It does not even sound like it is trying to turn the motor over. The body of the starter will get a little warm after trying it.

Here is what I have checked so far:
• Took the starter out and it turns freely with no load.
• Check the motor and the flywheel turns freely.
• Replaced the battery.
• Used a good battery from another running vehicle
• Hooked jumper cables from the battery straight to the starter and used a remote starter
• Made new battery cables and ran them from the battery straight to the starter and used a remote starter
Nothing I have done will allow the starter motor to turn while it is connected to the motor.

Took the starter back to the rebuild shop and they bench test it by putting power to it and letting it spin with no load. That is the extent of their test. They claim that since the starter will spin free with no load it is fine. They did not check the amps or voltage load.

I made them test the amps while I was there and it pulled 10-15 amps in free spin. That sounds like it may be a bit low, but I am by no means no much about electrical.

I can not understand how a broken starter will turn over a motor and then will not after it is rebuilt and have it not be the starter.

Any suggestions?