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Get started with the Forney 270 MIG Welder! This is a breakdown of the Quick Start Guide that is included with your new machine. 

First Steps

1. Read User Manual Icon Read User Manual

2. Assemble front handle, trim pieces and wheels. (Tools needed: screwdriver and snap ring pliers). 

Assemble front handle
Assemble front handle with a screwdriver

 3. Attach gas bottle and regulator hose assembly. (Tools needed: adjustable wrench). 

Attach gas bottle and regulator hose
Attach regulator hose

4. Install wire spool. Insert wire through both wire liners and clamp it into wire drive. Make sure drive roll, liner and tip are correct for wire diameter. 

Insert wire spool
Clamp the wire into wire drive

 5. Install MIG gun, turn it on, and squeeze trigger until wire comes out. 

Install MIG gun
Squeeze trigger until wire comes out

6. Tighten wire feed tension knob clockwise until wire will bend from feed tension at 2″-3″. Verify polarity is set correctly for MIG or Flux-core welding wire.

Tighten wire feed speed
Verify polarity

7. Adjust wire feed speed and voltage per chart on the inside of welder. 

Adjust wire feed speed
adjust voltage

8. Turn machine on and weld. Adjust stickout, travel speed, wire feed speed and voltage as necessary to achieve a good weld. See below guide for weld examples and welding tips. 

WARNING: To prevent fire and serious injury: Keep torch and wire clear of grounded objects while welder is plugged in. Be sure to follow safe welding procedures and wear proper PPE (fire resistant jacket, welding helmet, safety glasses, welding gloves, boots, etc.) 

Weld Examples

Good Weld 

  • Smooth bead
  • Minimal spatter
  • Good fusion 
Example of a good weld

Current/WFS Too High 

  • Too wide
  • Bead too flat
Current or WFS too high

Current Too Low

  • Lack of fusion 
Current too low

Weld Speed Too Fast

  • Stringy and lack of fusion   
Weld speed too fast

 Weld Speed Too Slow

  • Melt through 
Weld speed too slow

Stick Out Too Long

  • Excessive spatter 
Stick out too long

Welding Tips

 Optimal Stickout

  • Stickout 1/2″ +/- 1/8″
  • Short stickout = more current and more penetration

Click here for a video on Stick Out

Half Inch Stick Out


  • Affects the arc shape
  • Less voltage = tighter arc and potentially more spatter

Wire Feed Speed (WFS)

  • Higher wire feed speed equals more amperage 
  • Can also affect arc shape and penetration 
Wire Feed Speed Knob

Travel Speed 

  • Affects bead width and height
  • Can also affect penetration 
Travel Speed
Thin MaterialLess voltageLower wire feed speedFaster travel speed
Thick MaterialMore voltageHigher wire feed speedSlower travel speed
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