I have a couple 1970's mixmasters, took one apart today for fun. The governor capacitor has a lot of green corrosion on the ends. Does this mean it is shot? I just want to make sure before I get rid of it and buy a "new" one. Please forgive my ignorance!
You could buff off the contacts with some sandpaper and then check it with a multitester to see whether it's in spec but my guess is it's probably bad. You should probably also clean the contacts inside the mixer as well.