Kevin shows how to set up a MIG welder – in this case, the Longevity MigWeld 140 – for welding with flux core wire without gas. He shows how the graphic inside the lid shows you how to attach the ground to the DC electrode positive and the welding gun to the DC electrode negative. He shows how to adjust the wire feed and the feed roller pressure, then how to easily push the wire to the electrode by turning up the wire feed, then replace the nozzle.