Welder for body metal

My neighbor has a 120v Clarke Mig Welder which I have used a few times and compared to my Lincoln it's not very good, the wire feed is inconsistent and jams up regularly where the Lincoln never does.

Recently it wasn't working and he brought it over for me to look at. None of the local welding supply houses had any parts and the only parts I could find on line were tips hoods and the gun. Anything inside was not available.

You can get a Lincoln Power Mig 140 for about $400 new if you shop around and 1/2 that if you buy used. It has 100% duty cycle up to 140 amps. The older 135 won't go as high but a 40% duty cycle mentioned for the Clarke sucks.