Bobcat™ 250 Engine-Driven Welder | Miller - MillerWelds

Bobcat™ 250 (Kohler)

Rugged welder/generator is great for Stick and Flux-Cored welding and designed for maintenance/repair operations, construction, farm, ranch and generator use.
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IMPROVED! Quieter and Better Sound
Significant improvements in sound level and quality offer better jobsite communication, which provides a safer, more efficient working environment for you and your crew. New Bobcat welder/generators have rotated the engine toward the front to create more efficient airflow, resulting in significantly quieter operation. Now you can start your job earlier in the day and end it later, as well as work around hospitals, businesses, and residential areas.
IMPROVED! Smaller and Lighter Design
New Bobcat welder/generators take up less space on trucks and trailers—leaving more room on your truck for other equipment and tools. Plus, they’re easier to move safely around jobsites—even with weld cables and running gear attached.
Electronic Fuel Injection (EFI) Option
EFI gas engines optimize the air/fuel ratio for all engine speeds and engine loads, resulting in lower operational costs, fewer emissions, longer runtimes and better performance when compared to carbureted models. The payback from fuel savings alone is a matter of months. EFI will give you: 27% Better Fuel Economy Save up to $1,000 per year in fuel Extend Runtimes by as much as 27% Fast, Easy Starts in All Climate No choke required Reliable Operation, Even with Infrequent Use Less prone to fuel deterioration More Generator Power 12,000 Watts of generator Power Go Green with Reduced Emissions 27% less CO and 33% less HC+NOx levels Learn More:  PDF >>  Video >>  Learn More
IMPROVED! Easier Maintenance
With its intuitive design, the daily maintenance of our new Bobcat welder/ generators is faster and easier. With front panel maintenance displays, you know when your equipment needs to be serviced. And servicing is simple because of: Oil checks that can be performed from the top by the front panel Toolless panels that allow for quick access Single-side fuel fill and oil drain/filter
Smooth Power – Not Spike Power
Revolutionary ten-degree skewed-rotor design optimizes generator performance for smoother power - not spiked power found with other brands. Better power— better performance.
Accu-Rated™– Not Inflated Generator Power
Miller’s Accu-Rated™ 11,000 watts (12,000 with EFI) of usable peak power is delivered for a minimum of 30 seconds. Accu-Rated means peak power is usable for maximum generator loads such as plasma cutting, Millermatic® MIG welders and motor starting. Accu-Rated peak power beats the competition’s very shortduration peak or surge power. Use your peak power, it’s more than a number.
Designed for Reliability
From Appleton, Wis. USA, our welder/generators are the most rugged, durable and long-lasting in the industry. We manufacture them to exceed requirements for extreme working conditions and they are hard-working from the core: Copper windings and iron generator components for a quality-built machine Lugged — not soldered — heavy internal leads for better field durability Superior cooling technology for maximum performance and engine life Super-tough armor to protect the welder/generator from accidental impact Protective armor doors to cover the weld studs and receptacles as required by OSHA and CSA for jobsite safety Lift hook integrated into the center frame, which bolts to the machine’s base for greater durability Long runtimes provide many hours of use before refueling is necessary
Reversed Generator Airflow
Exclusive engine and generator packaging design operates cooler and more efficiently. The engine is rotated towards the front to create more efficient airflow. More efficient airflow and exclusive engine location are significant contributors to reduced sound level and size reduction. Hot air recirculation is eliminated when machine is mounted in tight spots, and internal parts are kept cool for optimal performance.

Not Included

  • Weld leads



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

General Specifications

Title Bobcat™ 250 (Kohler)
Industries Interests Construction
DIY / Home Hobbyist
Farm and Ranch
Commercial Truck and Trailer
Maintenance and Repair - Field Operations
Mechanical Contracting
Work / Service Trucks
Engine Brand Kohler
Engine Idle Speed 2300 RPM
Engine Weld Speed 3600 RPM
Fuel Tank Size 12 Gallon
Fuel Type Gasoline
Horsepower 23.5 hp
Weldable Metals Aluminum
Stainless Steel
Rated Output CC/AC Stick/TIG 250 A at 25 V, 60% duty cycle
Single Phase Generator Continuous Power 9500 W
Single Phase Generator Peak Power 11000 W
Sound Rating 72 dB @ idle and 73 dB @ weld dB
Current Type AC / DC
Amperage Range 40 - 250
Net Width 20 in
Net Height 28 in
Net Length 40.5 in
Net Weight 501 lbs
Warranty Engine Warranties
Miller's True Blue Warranty
Portability Lift Eye (Standard)
Running Gear / Cart (Optional)
Trailer (Optional)
Weld Output CC / CV




build with blue winter savings


Reviews & Ratings

Rated 5 out of 5 by from Big Blue This is the best welder on the market. I've used them all and none compare. Mine is 250 bobcat with efi.
Date published: 2015-09-09
Rated 5 out of 5 by from Bobcat 250, powerful and smooth This welder has all the power i've ever needed on the ranch, and starts up no questions asked on the first try, even when it's frigid or been a long time since the last use. I have to use it on lower settings than i'm used to even when welding 3/8" thick pipe, you won't find something too heavy of thick to weld with this machine. It's blue, and it's tried and true!
Date published: 2015-08-19
Rated 5 out of 5 by from Very verstile and reliable! I have had my Miller Bobcat welder for 6 years now and it has never failed to accomplish all I have demanded from it. The trailer is set up with temporary lighting, stick welding, and MIG welding. I own my own service garage and manage a large farm which all would be a lot harder without the reliability of my Miller Bobcat 250 welder.
Date published: 2015-08-18
Rated 5 out of 5 by from Great welder I upgraded from a 30 year old miller welder. The Bobcat 250 is quieter and has a lot of improved features. It is easy to operate and does a nice job.
Date published: 2015-08-18
Rated 5 out of 5 by from Very good machine This has been a very good welder and generator. Welding is very consistent. I have used most available types and sizes of rod and there are no surprises like the arc going soft or 'how did that happen'. The generator is great, you can run a heavy duty plasma cutter and air compressor with no problem or anything else you want while your partner is welding. There really isn't anything you can't weld with this machine. It is also a fairly quiet machine. I like the tank size, you can stretch a day way into overtime.
Date published: 2015-07-18
Rated 5 out of 5 by from Water Well Drilling Contractor Having a peice of equipment that performs flawlessly each and every time is a MUST. I have been drilling wells for over 4 decades. In that time, I've welded a little pipe(I figure 20+ Miles in my life)! So I need a welder that WORKS. Whether it's a crew I send out or building equipment in our shop, Miller Welders are Quality #1! I've owned other, cheaper welders, just to burn them up! One of my Millers is 20 years old, still running strong! So if you have to make a living, and need a machine to count on EVERY SINGLE DAY, then this is it! No one paid me to say this, it's a fact!
Date published: 2015-01-08
Rated 4 out of 5 by from Smooth and easy to use. I give it 4 outta 5 on everything. It's very smooth and easy to run. I'm not a good enough welder to know enough about it to give it all 5's.
Date published: 2014-12-10
Rated 5 out of 5 by from amazing welder but gas gauge dosent work i have owned my bobcat 250 for around 3 months now. after the first fill, my gas gauge stopped working. other than that the product is amazing and i would recomend.
Date published: 2014-08-12
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