Update...I opened up the old motor to see if I could find the problem. everything looked fine, brushes etc. Spun the armature a few times; spun freely. Put the motor back together and retested. It works fine. I'm not sure what I did, but I guess the problem is solved...I hope
My Dad used to do this. I would work on something, get frustrated and ask for help. He would either take it apart, or sometime, just say, "Try it again". Then it would start. I loved my Dad. He could fix anything.