Porter Cable 690 Troubleshooting Advice
I picked up a free PC-690 variable speed with a plunge base and no other accessories or manual. I brought it home and fired it up. It ran ok on low speed then turned it off and fired it back up and then switched to high speed. It ran a few second and slowed then stopped. While it was running I noticed a small amount of blue sparks comng from the top just before it quit. I have seen motors do this a little but this was a little more than normal. I don't think it had been used in quite awhile. Just curious where I should start looking before thinking of sinking money into parts.