Starter question

Is there any "sound"..... a "chunk" type of noise??
I'm not suer of how this is mounted, but is it possible that a shim is needed.

If you loosen the starter...would it engage?? (obviously, just to try something simple)
No, no shim on this type starter, if the bendix were to try to engage shimming would make the situation worse.
I put the other one back in for now being it does still work when the "dead spot" doesn't end up in the wrong spot....