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Hey hay, Sorry, the devil made me do it. Dave covered most of the conditions that can cause problems like yours. One I don't think he mentioned is the tension on the wire roll holder. It should be tightened just to the point that it stops the roll of wire from continuing to turn when the feed rollers stop. Tighter than that can cause the wire to feed unevenly which you will experience as stuttering at the weld (similar to the way it feels when the wire feed speed is too high for the amount of heat.) If the wire holder is too loose you can get birdnesting in back of the feed rollers. While neither of these conditions describe the problem you are having, it's simple to check and it won't hurt to do so. One other thing you can do is to buy or rig up a device that wipes the wire before it enters the liner. I paid a few bucks for one from a mail-order place, and what I got was basically a big paper clip of the pinch-clamp variety and a half dozen pieces of some fabric which is much like nylon scouring pad material for washing dishes. This is supposed to be a good idea particularly if your welding area is exposed to metal grinding, sawdust, wind from the Gobi desert, etc. Be sure to let us know what works to solve the problem. This is a common problem on this forum and it has a history of being a real puzzler. All the best, Stan
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