Re: Ed 1993
The bearings in the starter when worn can cause the rotor to sometimes get pulled slightly off centre and jammed. Usually you'll hear a quite buzzing noise when this happens and sometimes you can short the rotor on the stator depending on how bad it is. If the rotor is getting mechanically jammed try getting someone to turn the key and when it's playing up, bash on the starter with a spanner to try to free the rotor. Don't go to town on it, just try to see if you can get it to spin by tapping / bashing it.