New MIG - unstable arc
I recently purchased a used Schumacker Turbo 145 MIG welder. It's a 120V unit and I picked up a tank of C25 gas to go with it. I just tried welding for the first time today. The arc doesn't stay on to heat up the metal so I just get some plops of melted wire on the base metal. The electrodes are properly hooked up for gas welding and I have it plugged directly into a 20A outlet. It's been a few years since I welded, but I don't think I'm THAT bad!. I fiddled with some different settings and it was the same on/off arc with all heat settings. Any help is appreciated.