hey there- I know this post was a long time ago…but I am currently (july 2018) having the same issue. I have had the welder since 2015 and always wondered why welds were so inconsistent. when I went to change to a new 8″ roll of wire, I found the issue. Feed starts off great the then all the sudden just gets really slow. AND it doesn’t matter where the speed knob is set. It like just one speed.
so do I have a bad wire feed motor? how can I get one? can I replace myself?