floor pans

I never ran my Hobart 140 on Flux wire so not sure how different it is. Other than being a bit messier, should be similar. I have run out of gas and know what that does...I think I found the right manual for that welder. Doesn't look like any polarity change on it since it can't run gas. Something you could check is wire feed. First does it feed out nice in open air? Next hold the tip on a board and feed it. Should have enough force to push back. If not you need to adjust wire feed. If all that is good and metal clean, you may just be going too fast. I checked my floor pan thickness and it was closest to 20ga. That welder is supposed to do 18ga to 1/8in. So should actually be slightly hot for this job at lowest setting. By the way, I am no expert. Had done some stick many years earlier,but I bought a mig welder because I needed to fix my Duster.First job on the car was floor pans..lol. but before I did that I got a bunch of scrap metal and built a cart for my welder.