I am not completely happy with the rewiring I did on the Singer 66 motor. The insulation fell off all the way back to where the wires go into the motor. I got the heat shrink close as I can but there is still a tiny gap where it flexes. I am going to put liquid tape in that tiny gap. (And then use some more of the liquid tape on the sides of my bike. Anything to stop it from scraping on bike racks.)
But I have to thank you all for sharing knowledge and the confidence that we can fix things. I also took the lawn mower out today and its blades made the most terrible squealing noises. Last year I would have had no idea what to do. This year I looked and said "rust spots on the blades" and took them off with sewing machine restoring techniques. No more squealing.