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I just bought a willys and he wount start.My starter motor is rotating very slow .I took off and try it whit 24 volt from the battery and is working.When i put back on the car ,and rotating very slow .and the engine cant start.I took out the sparks and its rotating a little bit faster .Do you have this problem somebody whit the starter motor ?Sorry for my english if i made mistakes,i hope you guys understand me.)

Most starters with problems will spin nicely when not under a load. You should have your starter examined by an automotive electrical shop where they can check it properly by doing a stall check and taking required electrical measurements.

Any engine will rotate quicker with it's spark plugs removed. Any on the vehicle tests you may be able to do would require knowledge on the proper use of a digital volt meter (VOM) to measure available voltage and voltage drop during cranking.

There are may causes I could list for the symptoms you describe, but none would be an accurate assessment of your problem due to inadequate information in your post.

I hear a strange noise between the flywheel and the bendix ,a grinding.And sometimes is harder even stops the rotation.

The bushing that holds/centers the shaft may be worn on the starter. That is if you have a bushing on the shaft end where it goes into the bellhousing.

He'll need to better ID what he is working on to ensure accurate troubleshooting help. 24V only narrows the make model down to M201, M38, M38A1, M170, M151 (yes Willtys built these two years) .

1 - What model jeep?

2 - What engine is in it.

3 - What model/PN starter is it.

4 - How many teeth on the bendix drive?

5 - How many teeth on the flywheel?

I have a m381a willys

Thanks you guys for help i resolved the problem .It was the starter.