Starter motor replacement

[MartH70]

Guys, I tried fitting a new starter yesterday, got it all stripped except the lower bolt on the starter which will only turn about 3 turns then goes solid. Tried taking it in and out loads of times which helped a bit but still goes solid. First though is that the thread is damaged which will mean engine out! Anyone got any ideas I can try? Cheers.

[MartH70]

Thanks for the quick reply nick, I have used loads of wd40 with no luck and have an Allen key socket on a socket set. Will give it another go at the weekend and if that doesnt work then it's off to the garage!