This is a
tool I just got done making to help with
stuck engines and to use for turning the engine during assembly when rebuilding. I used my angle grinder to cut the helix of a broken starter drive about 1/8" beyond the pinion. I then welded the helix and pinion to a piece of 5/8" steel shaft, slipped on a thick washer, greased it and slipped it through a broken end plate I'd saved. I then slipped on a large nut and welded that to the shaft. The end plate just had a little of the alingment ring broken off, but I don't like broken parts on a good rebuilt starter.
By installing this in place of the starter I can use a large wrench to bump the flywheel back and forth on a
stuck engine, or it would make turning the engine over during a rebuild a lot easier.
This is not my original idea. I saw it years ago on Jim Mason's website under "HOMEMADE TOOLS".