My approach is almost the same to Roger's. I have used Chair Doctor and it works but doesn't seem to be a good method for long term repairs, possibly...
Been on the news the last few days about long (3 ft) flat-head worms showing up in some places in southern Ontario for the first time. Lots of things...
I should probably just leave this to the owners of your make/model of your saw but I have a 2HP Taiwanese contractor's saw and the motor does jump on...