Ace, It sounds like you have a "Misfit" orphan, that only needs some TLC. I have three 2020's, and one 681 and they all needed work, but all run like a champ now. I bought a 681-100 motor off the Bay, and when it arrived, I found out that the field windings were broken in at least three spots, and thought that once I got it to the last break, I could solder it back up, to get it to run. Well it ran, but talk about slow..... I wound up putting it aside, lesson learned the hard way.
I decided to experiment on it, and I wound up stripping all the windings off the field, I ground down the rivet end of the shafts that hold the brush plate on, and removed the core. I bought the right gauge wire, and decided to see if I could rewind the coil. It took forever, but I did succeed. Don't ask me how I re-attached the two halves back together (It worked for me), and I hooked it up for a test run with a transformer. This thing runs as good if not better than the others that I have. It just comes down to how much time or money you are willing to spend, as to whether it is worth fixing. I happily succeeded.
