Starter looked like it had been under the sea. So stripped it to have a look, lots of carbon deposits and the shaft bearing was tired.
As per usual gentle heat on the end cap and tapped the bearing out using a socket. New one was fitted using a long M10 bolt, socket and some washers.
Blasted the ends and body and painting in silver and dark grey.
The two long bolts that hold the starter together are M5 and I couldn’t find any long enough and as the original holes in one end were 6mm I drilled and tapped the other end to M6.