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Miller’s New Trailblazer® 302 EFI and Bobcat™ 250 EFI: Electronic Fuel Injection Reduces Operating Costs, Emissions

Electronic Fuel Injected (EFI) models reduce fuel consumption and emissions while improving performance over carburetor models. Contractors get a machine that’s good for the environment and reduces overall operating costs.

Highlights/Key Facts

Miller’s Trailblazer® 302 EFI improves fuel economy by 27 percent and reduces harmful emissions—all while increasing weld and generator outputs.

APPLETON, Wis., January 04, 2010Miller Electric Mfg. Co. introduces the industry’s only Electronic Fuel Injected (EFI) engine-driven twin-cylinder welder generators: The Trailblazer® 302 EFI and the Bobcat™ 250 EFI. Replacing the carburetor with EFI improves fuel economy up to 27 percent, reduces harmful emissions up to 33 percent and eliminates carburetor icing. Miller also increased the weld output and generator power (12,000 peak/10,500 continuous watts) on both machines to provide contractors a green, cost-efficient machine with improved performance over carburetor-based models.

Replacing carburetors with EFI reduces hydrocarbon (HC) and nitrogen oxide (NOx) emissions by 33 percent and carbon monoxide (CO) emissions by 27 percent while also saving as much as $1,000/year (assuming 25 gallons per week at $3 per gallon) in fuel costs.

Carbureted Models

EFI Model Advantages

Fuel Use

12 – 27% less

Weekly Fuel Cost

(25 gal/week; $3.00 gas)


$54.75 – a $20 savings

($20 x 50 weeks = $1,000/year!)

HC+NOx emissions

33% lower

CO emissions

27% lower

Run time: 1/8” 7018

20 hours

22.4 – 25.4 hours

Run time: welding at 140 amps and 40% duty cycle

16 hours

17.92 – 20.32 hours

Run time: 4000 watts

(continuous load)

14 hours

15.68 – 17.78 hours

Total output @ 3600 RPM

23 HP

25 HP

Accu-Rated™ power (same for Bobcat & Trailblazer

11,000 watts peak power

9,500 watts continuous

12,000 watts peak power

10,500 watts continuous

Bobcat 250 CV (wire) welding output

275 amps @ 60% duty cycle

275 amps @ 100% duty cycle – better for larger wires

Trailblazer 302 CC (Stick/TIG/Gouging) output

280 amps @ 100 % duty cycle

300 amps @ 100 % duty cycle – better for gouging


Trailblazer 302 EFI
Bobcat 250 EFI
EFI Product Information


“My biggest concern is fuel economy. It’s not just the cost of the fuel; it’s the cost of the time it takes to get the fuel and to fuel up the machine. The more economical the machine that I can get and the less often I have to go get fuel, the happier I am.”

—Kevin Callahan, project manager, APEX Steel, Redmond, Wash.

“We need a 300-amp machine for 5/64-in. wire to get us the production speeds that it takes to be competitive. This is a good size machine for the loads that we require.”

—Kevin Callahan, project manager, APEX Steel, Redmond, Wash.

Additional News Release Information

Higher Welding Output

The Trailblazer 302 EFI and Bobcat 250 EFI are both true multi-process machines that provide strong Stick, MIG, flux cored, AC/DC TIG and gouging capabilities. The Trailblazer 302 welds 280 amps at 100-percent duty cycle (300 amps/Stick); The Bobcat 250 welds 250 amps at 100-percent duty cycle (275 amps for wire welding). Running Miller welders off either machine’s generator power further transforms these engine drives into powerful multi-arc systems that increase productivity while lowering fuel use and cost-per-arc ownership.

All rated outputs are tested at 104 degrees Fahrenheit for optimal performance and integrity. Both machines feature a protective armor similar to that used in automotive bumpers and tractor hoods. This offers high-impact resistance in all temperatures and is chemical resistant. EFI eliminates carburetor icing and ensures easy starting and optimal performance in all climates.

Image Information

JPG Name: Trailblazer 302 EFI
Caption: Miller’s Trailblazer® 302 EFI improves fuel economy by 27 percent and reduces harmful emissions—all while increasing weld and generator outputs.

About Miller

Miller Electric Mfg. Co., headquartered in Appleton, Wis., is a leading worldwide manufacturer of Miller brand arc welding equipment and is a wholly owned subsidiary of Illinois Tool Works Inc. (NYSE: ITW).

For more information, visit Miller’s Web site at, call 1-800-4-A-Miller (800-426-4553), email, fax 877-327-8132, or write to Miller Electric Mfg. Co., P.O. Box 100, Lithonia, GA 30058.

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Editorial Contact: John Dymale, Insight Marketing, LLC, (262) 240-9790