• Everlast PowerMTS 251Si

The compact PowerMTS 251Si is one of the fourth generation of digitally controlled multi-process inverter welders from Everlast. Taking our customer's feedback into consideration from previous models, the all new PowerMTS 251SI is designed to be as versatile as ever with not only standard DC MIG, TIG and Stick welding capability but also with Synergic MIG, Pulse MIG, and Pulse TIG welding modes. This new welder is a leader in the compact multi-process welder class as both pulse MIG and pulse TIG features are not available from any other manufacturer. A major new feature the PowerMTS 251Si offers allows to the operator to choose from a touchless, high frequency start or a lift start in TIG mode. The stick mode offers more adjustability than ever with the addition of hot start intensity and hot start duration controls.

The unit is simple to operate and was designed with ease of operation in mind. There are no complicated menus to navigate, no touch screens to press and no complicated hidden features which are difficult to access. All controls, including burn back are now located on the panel face right where you can get to them and are grouped according to function, with an easy to understand format. All connections are right on the front of the panel. This includes the connection for the TIG torch which includes the gas connection with a gas solenoid control over pre and post flow. Compare that to the competition where you have to make the TIG connection through the side panels or through special non-standard connections with only a manually operated gas valve on the torch for scratch start or lift start, and you can see how far ahead the PowerMTS 251Si really is. Well, it makes sense when you consider Everlast was one of the first to offer a compact fully featured inverter MTS unit.

As you've come to expect from Everlast, the PowerMTS 251Si arrives almost ready to weld. It comes with MIG, TIG, and Stick torches, cables, and regulator. In addition to the TIG torch the TIG package includes a foot pedal and starter kit of consumables (tungsten not included) something that costs extra in units offered from the competition. You only need to supply the shielding gas, you choice of tungsten, and the welding wire/filler metal/welding rods to be up and running.

Features & Benefits

  • NEW! All Digital Synergic function MIG automatically adjusts wire speed while voltage is increased or decreased. This maintains a preset ratio of volts and amps that can be tweaked manually by user for best operation.

  • Manual Override of Synergic MIG function allows the user to regain control of at any point to fine tune automatic voltage settings and allows operation in full manual mode if desired.

  • Weld Aluminum, Stainless, or Steel with Synergic MIG function with wire diameter from .023- .045"

  • Exclusive! 9 channel memory function provides easy saving and recall of your favorite settings.

  • New! Synergic Spool gun operation capability with optional spool gun. Ideal for welding aluminum.

  • New foot pedal capability for TIG

  • True DC CC/CV Multi-Process design eliminates needing or carrying multiple units for one job.

  • Compact and light weight design makes the unit extremely portable, ideal for getting to remote job sites and during outings at the track.

  • Adjustable Burn-back control keeps the wire energized after wire has stopped feeding to allow the wire to melt back to a desired length without retrimming wire before restarts.

  • 8" Diameter wire spool capacity maintains portability while maintaining productivity.

  • Adjustable MIG Wave Form control manages slope/ inductance and fine tunes arc characteristics.

  • Adjustable Arc Force Control allows the user to dial- in desired Stick welding performance.

  • TIG Up and Down slope allows the user to control the end of the welding cycle.

  • DC Lift Start TIG features quick starts without problems associated with High Frequency.

  • 2T/4T torch trigger/latch function offers stepped control welding with TIG and MIG.

  • Automatic Pre and Post flow for TIG and MIG operation improves over all weld quality.

  • 250 Amps of MIG and TIG power offer more than enough power to get the job done. 200 amps of stick welding power will weld about anything you come across.

Standard Equipment

  • Nylon Liner
  • WO26 4m Gas Cooled TIG Torch
  • TIG Starter Kit
  • MIG25 4m MIG Torch
  • Gas Hose and 2 Clips
  • Spare MIG Tips with Spanner
  • 3 metre Electrode Lead
  • 3 metre Work Lead
  • 8 flux core capable drive rolls
  • Foot Control
  • Regulator

Recommended Areas Of Use

  • Portable Repair On Road or Off Road
  • Automotive garages/Muffler Shops
  • Motor Sports Facilities
  • Construction sites
  • HVAC
  • Factory Maintenance
  • Farm
  • Research
  • Light to Medium Industrial Fabrication


Type Digital/Micro-controlled IGBT Inverter
Output /Process Type MIG, DC TIG, DC Stick
Voltage/phase 240V 1 PHASE
Max Rated MIG Amps 250A
Max Rated TIG Amps 250A
Max Rated Stick Amps 200A
MIG Amps/Volts @ Rated Duty Cycle 250A/26.5V @ 35% Duty Cycle/40° C
200A/24V @ 60% Duty Cycle/ 40° C
160A/ 22V @ 100% Duty Cycle/ 40° C
TIG Output Amps/Volts @ Rated Duty Cycle 250A/20V @ 35% Duty Cycle/ 40° C
200A/18V @ 60% Duty Cycle/ 40° C
160A/16.4V @ 100% Duty Cycle/ 40° C
Stick Amps/Volts @ Rated Duty Cycle 200A/28V @ 35% Duty Cycle/ 40° C
160A/26V @ 60% Duty Cycle/ 40° C
130A/25.2V @ 100% Duty Cycle/ 40° C
Max Inrush ( I1MAX ) Amps 240V: 36A
Maximum Rated (I1EFF ) Input Amps 240V: 30A
TIG: 60V
Stick: 60V
MIG Output Range 30A–250A/15.5V–26.5V
DC TIG Output Range 10A–250A/15.5V–26.5V (High Frequency and Lift Start operation)
Stick Output Range 10A–200A/20.4V–28V
Variable MIG Inductance/Stick Arc Force Control Yes
Spool Gun Capable Yes
Standard Drive Roll wire size 0.6mm – 1.2mm
Separate wire feeder No, self contained
Number of Drive rollers 4
Max Wire Roll Diameter 8" (up to 12 lb)
Memory Yes
Upslope Time 0–5 Seconds (TIG only)
Down Slope Time 0–5 (TIG only)
Preflow time 0–5 Seconds
Post Flow Time 0-10 Seconds
Foot Pedal Foot Pedal capable — special order
Flux Core Yes, Optional
2T/4T /Torch latch/Trigger Yes
Other Features Synergic MIG and Spool gun operation
9 Saveable program functions
Product Weight 23kg
Shipping Weight 34kg



  • Weld up to a maximum of 1/2" single pass*
  • Weld up to a maximum of 3/4" multi-pass
  • Weld a minimum of 24 gauge

* Single pass welds greater than 1/4" are not recommended as a sound welding technique.



  • Weld up to a maximum of 1/2" single pass
  • Weld up to a maximum of 3/4" multi-pass
  • Weld a minimum of .015" thick



  • Weld with a maximum of 3/16" diameter electrode
  • Weld with a minimum of 1/16" diameter electrode




Product specifications may be changed at any time without notice. We make every effort to ensure the specifications are correct, but are very dependent on Everlast Power Equipment Inc, USA for the details.



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Everlast PowerMTS 251Si

  • Brand: EverLast
  • Product Code: Everlast PowerMTS 251Si
  • Availability: In Stock
  • $2,350.00

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