The old starter motor brushes on the way out so hit it trick.

/Thread drift alert

I once had a 1967 Mk2 Cortina (1500, pre crossflow) with this problem. A krook-lok was the best tool to hit the starter motor with in that instance. It took me a few weeks to get around to putting new brushes in the starter motor and the poor old crook-lok took quite a beating. Months later, when the Cortina had departed the way of all things that rusted in those days, I had replaced it with a Mk3 Triumph Spitfire. One sunny day, Mrs F & I went to visit an NT property. The krook-lok seized solid. I didn't have a hack saw in the boot - only a fine finishing file. It took 30 minutes to file through the krook-lok in a busy car park. Not one person challenged us. It could have been because the Spitfire, at that time, wasn't exactly pristine!

/End drift

Paul
Costock, UK
2014 4/4 Rolls Royce Garnet Red
Disco 5
Teddy - 17h1 Irish Draught cross