One of my vacuum timers did not have power so I checked it out and something had blown the breaker. I checked the vacuum motors and one smelled like melting plastic and the other smelled fine. So I replaced the stinky motor and everything worked great!
I have way too many different vacuum motors. I snapped this apart trying to pull the spring out. The right picture shows what it is supposed to look like.
These are my other weird types I found today. The motor on the right has a spring you have to press down to insert the brushes. 4 out of my 4 motors were different today (the other was a lamb motor).