Trailblazer® 302 Air Pak Engine-Driven Welder | MillerWelds

Trailblazer® 302 Air Pak™ w/cool/sep, GFCI, Electric Fuel Pump

Powerful all-in-one tool is designed for repair and construction with unbeatable multiprocess weld quality, integrated rotary screw air compressor, 13,000 watts of generator power for tools, and the battery charger jump start.

GFCI, Electric Fuel Pump, Cooler/Separator

Base Model

GFCI, Electric Fuel Pump


Superior Arc Performance
The best arc performance and multi-process versatility: Four preset DIG settings (Stick) to make the arc softer or stiffer depending on electrode and operator preference. Adaptive Hot Start (Stick) ensures easy arc starts regardless of operator technique. Excellent MIG/FCAW arc performance to run smoothly with solid and flux-cored wires. Lif Arc, TIG with Auto-Crater and Auto-Stop. Lift Arc minimizes/eliminates contamination when starting, Auto-Stop prevents arc flare at the arc end and Auto-Crater eliminates the need for a remote control by automatically ramping down amperage at the end of a weld to fill in the crater. DC Stick: 25-300 A DC TIG: 10-300 A AC TIG/Stick: 10-225 A MIG/FCAW: 13-35 V, 350 A
Four Tools In One
Professional welding performance in all processes with the best welding arc in its class. 13,000 watts of auxiliary power, 31 CFM rotary screw air compressor, and 12-24-volt battery charger/ jump starter.
Independent Weld/Auxiliary Power
Delivers an industry-leading 13,000 watts of peak auxiliary power independent of weld settings—enough to power a Spectrum® 875 plasma cutter, and provide air for plasma cutting at the same time. (Rated 5/8" mild steel)
Rotary Screw Compressor
Quiet and durable rotary-screw compressor delivers 31 CFM at 80-160 psi of air at 100% duty cycle while rated at 104° F.  It offers an average of three times the service life of traditional reciprocating compressors. Produces air when you need it; no more down time waiting for an external tank to fill. Airflow can be selected depending on tool requirements. Front panel air pressure adjustment makes it simple to dial in the correct air pressure for specific applications (80-160 psi)
A Battery Charger/Jump Starter
Selectable 12- or 24-volt battery charging capability providing up to 450 amps for jump-starting. Conveniently located on the front panel.
Lower Fuel Consumption and Emissions
Air compressor, welder and auxiliary power are all run with one engine, reducing emissions and reducing fuel consumption up to 50%.
Requires Half the Space
Takes only half the bed space of a separate engine-driven air compressor and welder, freeing up 50% more room on your truck for equipment and supplies. The Trailblazer 302 Air Pak offers up to 25% less axle weight for payload advantage.   
Easy to Service
Side and top access doors make it fast and easy to reach engine and air compressor compartments. Digital maintenance meters automatically track hours and service schedules.

Not Included

  • Weld leads



Air Carbon Arc Cutting and Gouging (CAC-A)
Flux Cored (FCAW)
Plasma (PAC)
Stick (SMAW)

General Specifications

Title Trailblazer® 302 Air Pak™ w/cool/sep, GFCI, Electric Fuel Pump
Industries Interests Construction and Fabrication
Amperage 10 A - 300 A
Weldable Metals Aluminum
Stainless Steel
Current Type AC / DC
Portability Lift Eye (Standard)
Running Gear / Cart (Optional)
Trailer (Optional)
Engine Brand Kohler
Engine Idle Speed 2400 RPM
Engine Weld Speed 3600 RPM
Fuel Tank Size 12 Gallon
Fuel Type Gasoline
Horsepower 27 hp
Weld Output CC / CV
Rated Output CC/AC 200 A at 25 V, 60% Duty Cycle,CC/DC 280 A at 32 V, 100% Duty Cycle,CV/DV 350 A at 32 V, 60% Duty Cycle,300 A at 32 V, 100% Duty Cycle
Single Phase Auxiliary Continuous Power 11000 W
Single Phase Auxiliary Peak Power 13000 W
Sound Rating 73.4 dB @ idle and 81.2 db @ weld
Compressor Brand Rotary-Screw Compressor
Compressor Free Air Delivery 31 cfm (0.88 m3 /min.) at 3,600 rpm / 28 cfm (0.79 m3 /min.) at 3,000 rpm / 22 cfm (0.62 m3 /min.) at 2,400 rpm (idle)
Compressor Working Pressure 80–160 psig
Compressor Duty Cycle 100%
Compressor Automatic Shutdown High pressure (160 psi)
Applications Fabrication
Battery Charge 10 - 75 A
Crank Assist 450 A, 12V / 350 A, 24 V
Net Width 20 in
Net Height 34.5 in
Net Length 59.625 in
Net Weight 771 lbs
Warranty 3 Years
Miller's True Blue Warranty




Operator grinds on a jobsite with an engine-driven welder/generator in the foreground
Welder stick welding with Miller equipment
Operator carbon arc gouges on a beam on an outdoor jobsite


Question & Answers