clark welders

Mine's a 160 EN 220 Volt. I've got years of welding experience with no issues until my lincoln crapped out and i bought this thing. I can't keep a solid, smooth weld going, the spark is literally chattering, I've played with the wire speed on all 9 settings, as well as the other settings. It acts like a dang machine gun the way its sparking up.

Mine is a 180 EN. I use 75/25 gas on mine. I'm still teaching myself to weld, so I'm probably not the best one to ask if it's working correctly. I do know that my welds are beginning to look better though. LOL