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I bought a CM Block grinder model 397 19340. It worked when I plugged it in prior to buying it. I brought it home and when I hit the power switch it made an audible pop and a white flash came from underneath it. I unplugged it, checked it out and did not see anything visibly burnt (I am sure...

I bought a 397 series 1/2 HP Craftsman block grinder. It worked great but I decided to get it cleaned it up and painted up all nice. I put a new stone and wire wheel on it and within 10 seconds of turning it on it made a loud pop and a bright white flash. It blew the house breaker so I reset...