I have a sears radial arm saw too and last year it died on me. The shop
told me if it was the centrifugal switch which could not be purchased it
could be replaced with an electronic one and that is what yours look like in
the pictures. The original centrifugal switch is history. Mine had an
intermitant open starting winding. They could not find the source of the
problem so they rewinded the motor. Cost me $275 Canadian but still a lot
better than $1000. I have mine wired for 220 and I first took it to the
largest and most respectable motor shop in the area. I did not tell them it
was wired for 220 and they told me it could not be fixed but could not find
anything wrong with it. I then took it to a small shop and he was a lot
more helpful and knowledgable. I believe the problem at the first shop is
that they assume it was 110.
Glad to hear that you have your saw working again. Sounds like somebody did
not buy a 220 receptacle but used a 110 receptaclel instead, not a very safe
thing to do.