Weird starter issue

[MonzaRacer]

You will find that either it has a worn pulling yoke or the piston inside the soleniod is deformed or damaged.
Its not uncommon.
Another thing is that the s terminal wire was wrapped around the battery cable and was gettingunduced current but I would figure its in the pullin yoke being worn/damaged. when tearing starters down to swap noses or replace brushes in pinch you see the yoke worn and it causeing lots of problems or on a new starter the rebuilder just migs up the wear and sprays it with water for a super hard repair.
Lee Abel
PS oh yeah most people think the starter starts turning when the solenoid gets power but it wont start turning till that little piston pushes the button way back in the back of the solenoid. figured this out at a young age as I found out you need to know the length of the old solenoid cause if you have a short solenoid piston and a deep solenoid it will click and not start, then had to figure out how to get the other piston/yoke out and into my starter then it started(parts tarter was junk but solenoid was new)