Aha! Tammi, the latches holding the machine to it's base are both broken - it could very well have bumped up and down any number of times! However, the spool pin is broken off almost flush with the top of the SM, so I think we may need to drill it out. I'll have to get my DH to do that, as I doubt I have the strength.
The wiring from the motor to the plug is aluminum and all the insulation is cracking off, so it definitely needs some work! I am reading Rain's blog on rewiring a motor and Cari sent me a link to a tute on cleaning the motor, which I will read next. I hope to get started on it tomorrow, but I feel I need at least a couple of hours in a row open, which may not happen. Maybe Friday. This is fun!