Lincoln Weld-Pak 90i MIG
#4 in 120 VFull review
A small, light 120 V MIG welder for hobby, auto body and home repair work. It is a good first welder if you don’t need thick steel or other processes.
Amazon $414.99$414.99
The Lincoln Weld-Pak 90i MIG and the Lincoln Power MIG 140 MP are evenly matched, rated 3.2 and 3.2. The Lincoln Weld-Pak 90i MIG leads on value and weight. The Lincoln Power MIG 140 MP wins on processes. The Lincoln Weld-Pak 90i MIG costs $764 less ($414.99 vs $1,178.99).
Lincoln Power MIG 140 MP
#5 in 120 VFull review
A versatile 120 V shop welder for hobbyists and auto body work who want stick and TIG on the same box. Pick a dual voltage machine if you have 240 V and weld thicker steel.
Amazon $1,178.99$1,178.99
Prices were last checked November 1, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Lincoln Weld-Pak 90i MIG for value ($3.46 per amp ($414.99, 120 A maximum) vs $8.42 per amp ($1,178.99, 140 A maximum)) and weight (15 lb vs 34.5 lb).
- Choose the Lincoln Power MIG 140 MP for processes (MIG, flux-core, stick, lift TIG, takes a spool gun for aluminum vs MIG, flux-core).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 120 V MIG welder; a clear win is highlighted. How we rank explains each one.
| Factor weight | Lincoln Weld-Pak 90i MIG | Lincoln Power MIG 140 MP |
|---|---|---|
| Overall rating | 3.2/5 | 3.2/5 |
| Value 30% | 46 $3.46 per amp ($414.99, 120 A maximum) | 0 $8.42 per amp ($1,178.99, 140 A maximum) |
| Duty cycle 20% | 28 30% at 90 A, about 17% at full output | 71 60% at 95 A, about 28% at full output |
| Processes 15% | 40 MIG, flux-core | 100 MIG, flux-core, stick, lift TIG, takes a spool gun for aluminum |
| Weight 10% | 100 15 lb | 57 34.5 lb |
| Warranty 25% | 50 3-year warranty on the machine | 50 3-year warranty on the machine |
Specifications
| Lincoln Weld-Pak 90i MIG | Lincoln Power MIG 140 MP | |
|---|---|---|
| Output | ||
| Input voltage | 120 V | 120 V |
| Maximum output | 120 A | 140 A |
| Rated duty cycle | 30% at 90 A | 60% at 95 A |
| Thickest steel, one pass | 0.25 in | - |
| Inverter | Yes | - |
| Processes and wire | ||
| Gas MIG | Yes | Yes |
| Stick | No | Yes |
| TIG | No | Lift TIG |
| Spool gun ready | No | Yes |
| Wire sizes | 0.025 to 0.035 in | 0.025 to 0.045 in |
| Synergic settings | No | No |
| Build | ||
| Weight | 15 lb | 34.5 lb |
| Warranty | 3 years | 3 years |
| Released | - | 2019-09 |