21749 - ESAB MT-140 Replacement Liner 12ft .023-.030 Wire

Smooth Out Your Feed with the MT-140 Liner

Is your wire sputtering, sticking, or burning back to the tip? Before you blame your welder settings or the wire itself, check your liner. The liner is the backbone of your MIG gun, and over time, it gets clogged with copper dust, dirt, and debris. The ESAB 21749 is the direct replacement liner for your MT-140 MIG gun, designed to get you back to welding with a smooth, consistent hiss.

This liner is built for the small stuff—specifically .023" to .030" wire. If you are doing auto body work, light fabrication, or hobbyist projects with your MT-140, this is the part you need. It is 12 feet long, giving you plenty of reach, and is made from a tough steel coil that guides the wire without snagging. A fresh liner eliminates that frustrating "chatter" in the gun cable and helps prevent birdnesting at the feeder.

Swapping out a liner is one of the cheapest and most effective maintenance tasks you can do. Don't fight your equipment; if you feel resistance when feeding wire by hand, or if your arc is unstable despite good ground and clean metal, it's time for a change. Keep a spare 21749 in your toolbox so you aren't stuck waiting on parts in the middle of a job. It trims easily to fit your specific gun setup and installs in minutes.