Press the tension release lever on the drive roller. Insert the wire through the guide tube, over the appropriate drive roller groove (0.030” for most work), and into the torch liner. Close the tension arm—do not overtighten. Press the trigger until wire exits the tip.
Verdict: A "Pro-sumer" Powerhouse in a Compact Frame
The CEM Dual Mig 120 is not your typical hardware store welder. While it sits in the entry-level amperage class (120 Amps), it is built with the components and philosophy of an industrial machine. It is widely considered one of the best compact MIG welders for automotive work, light fabrication, and home workshops that demand reliability over flashy features. cem dual mig 120 manual
WARNING: Read entire manual before use. Welding produces intense UV light, heat, sparks, and fumes.
The CEM Dual MIG 120 manual lists clear safety warnings. Ignoring them risks fire, electric shock, or eye damage. Press the tension release lever on the drive roller
Before diving into operational tips, you need the original document. The official CEM Dual MIG 120 manual is typically available in PDF format. Here are the best sources:
Pro Tip: Save the PDF to your smartphone and print a waterproof copy for your workshop wall. WARNING: Read entire manual before use
The CEM Dual MIG 120 usually features a switch or tapped voltage control (Low, Medium, High) or a numbered dial (1 through 5 or 6).
This is the most critical step in the CEM Dual MIG 120 manual.
Why? Flux-cored wire requires less heat in the base metal and more penetration; reversing polarity reduces spatter.
Check that the gas solenoid is clicking. If not, the manual advises testing the trigger continuity with a multimeter. Also, ensure the gas regulator is open and the hose isn’t kinked.