21750 - Firepower MT140 Replacement MIG Liner 12ft for .030-.035 Wire

Restore Smooth Wire Feeding with the MT140 Liner

Is your MIG welder sputtering, or does the wire seem to pulse and drag as you weld? Often, the culprit isn't your machine settings or the contact tip—it's the liner hidden inside your torch cable. The ESAB Firepower 21750 Liner is the specific replacement part you need for MT140 MIG guns to get back to laying down smooth, consistent beads. Over time, liners get clogged with dirt and metal dust, or they can develop kinks that make the wire bind up. Swapping out your old liner is one of the cheapest and most effective ways to tune up your welder.

This liner is 12 feet long and is designed to handle the most common wire sizes for light-to-medium fabrication: .030" and .035". Whether you are welding mild steel in your garage or doing repairs in a small shop, this steel-wound conduit ensures your wire glides effortlessly from the machine to the puddle. A smooth wire feed means a stable arc, less spatter, and less frustration for you.

Installation is straightforward. Simply remove the old liner from your MT140 gun assembly and slide this new one in. It is built to the correct length for standard 12-foot cables, so you likely won't need to do any trimming, though it can be easily cut to size if your specific setup requires it. Don't let a $20 part ruin your welds—keep your feed smooth with a fresh Firepower liner.