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Red-D-Arc GX300 - 300 AMP Gas Engine Welder

GX300 Gas Engine Portable WelderGX300 Gas Engine Generator Welder

Top Features

  • DC CC CV 10kW
  • 305 amps DC Output at 100% Duty Cycle
  • 22 HP Kohler Command CH22 Gasoline Engine
  • DC Stick, CV Wire and DC Pipe Welding with E6010
  • 10,000 Watts 120/240 Volt AC Auxiliary Power
  • Processes: Stick (SMAW), TIG (GTAW), MIG (GMAW), Air Carbon Arc Cutting, Flux-Cored (FCAW)

Chopper technology for the best welding arc available on the market. Full range output control in both CC and CV modes with arc force control in CC mode and inductance control in CV mode. MS-style connections for remote amperage control and wire feeders.

Product Details


DC Amperage Range: 20 - 305 amps continuous control
DC Voltage Range: 14 - 29 volts continuous control
Rated Output: 300 A at 29 VDC, 100% duty cycle
Auxiliary Power: 10,000 watts Peak, 60 Hz, 100% duty cycle 120/240 VAC
Weight: 540 lb (245 kg)
Dimensions: H: 39.2" (996 mm) W: 24" (610 mm) L: 48" (1219 mm)
Fuel: 9 gallons (34 litres) Fuel Consumption: 1.67 gallons (6.32 litres) per hour at rated load
Fuel Capacity: 12 gallons (45.4 litres)
Oil Capacity: 2.0 quarts (1.9 litres)
Operating speeds: Full load 3,500 rpm, high idle 3,700 rpm


Stick (SMAW)
Air Carbon Arc Cutting
Flux-Cored (FCAW)

Additional Features

The GX300 is a 305 amp DC, multiprocess, 100% duty cycle, gasoline engine-driven welder with 10,000 watts peak (9,500 watts continuous) 120/240 VAC 60 Hz auxiliary power. Rugged and reliable, the GX300 welder is built to Extreme-Duty specs with a completely enclosed case and is available with an optional protective frame with base that will accept a 3-wheel shop wheel kit. With an optional adapter, the frame with base can also be mounted on a 3+3 construction trailer. Designed for welding professionals who demand a superior welding arc. CSA certified

Kohler OHV Command CH22, 2 cylinder, 4 cycle, air-cooled, 22 HP @ 3600 RPM, 41 cu in (674 cc) gasoline engine


  • “Chopper Technology” delivers easy welding starts, smooth arc, low spatter and excellent weld bead appearance
  • Output Control is via a single, full-range, potentiometer-type output control (which eliminates output-selection taps)
  • Welding Mode selection includes CV-Wire, Downhill Pipe, CC-Stick and Touch Start Tig positions
  • Arc Control adjustment gives a softer, buttery arc or a more forceful, digging arc in CC-Stick welding mode and inductance/pinch control in CV-Wire welding mode
  • Built-in “hot start” for easier starts and restrikes, minimizing the electrode “sticking” to the work
  • Enhanced Downhill Pipe welding mode provides faster travel speeds - especially on fill passes
  • No high frequency is required with Touch Start Tig - you just lift the tungsten from the work to start the arc
  • When the torch is lifted at the end of weld, there is a voltage-sensing arc cutoff providing enhanced weld quality
  • Output at welding terminals can be switched to Weld Terminals On or Remotely Controlled
  • A Wire Feeder Voltmeter switch matches the polarity of the wire feeder-voltmeter to the polarity of the electrode
  • Remote output control is auto-activated when a remote control is plugged into a 3-pin MS connector and constant-speed wire feeders (such as the LN7) are controlled remotely via a 14-pin MS connector
  • An electric fuel pump assures consistent delivery in high altitude and warm ambient-temperature conditions
  • An engine hour-meter and an electric fuel-gauge mounted on the control panel are standard
  • The fully-enclosed sheet metal package results in a low 101.3 dB sound rating (Lwa) at rated load
  • Engine idle speed can be switched between High Idle and Auto Idle

Options, Accessories and Related Equipment

Shop-type undercarriage
Construction trailer
Remote control

Welding Safety Equipment

Related Equipment
LN25 wire feeder
42 and 115 volt constant-speed wire feeders.
Spool gun type wire feeder
Viper plasma cutters or Pro-Cut 25 plasma cutters (requires compressed air source)
Welding Safety Equipment

Still have questions?
Use our Contact an Expert page or call us at 1-866-733-3272. We will make sure you get the right welder for the job.

Red-D-Arc GX300 - 300 AMP Gas Engine Welder

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Airgas, an Air Liquide company, is the nation's leading single-source supplier of gases, welding and safety products. Known locally nationwide, our distribution network serves more than one million customers of all sizes with a broad offering of top-quality products and unmatched expertise.