Miller Bobcat 250
The Miller Bobcat 250 is a gasoline engine-driven welder/AC generator for stick, MIG, flux-cored and TIG welding. With the Kohler CH730 carbureted engine it provides a 40–250 A weld output range (225 A at 25 V at 100% duty cycle, 250 A at 25 V at 60%) and 11.0 kVA/kW peak / 9.5 kVA/kW continuous single-phase 120/240 VAC generator power, fed by a 12-gallon tank. The same unit built with the Kohler ECH730 EFI engine raises generator output to 12.0 kVA/kW peak and 10.5 kVA/kW continuous; machine weight is 600 lb with fuel and the lifting eye is rated for 1280 lb.
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Miller Bobcat 250 specs
FuelGasoline
PhaseSingle-phase
EngineKohler CH730 or Kohler ECH730 (EFI), air-cooled, two-cylinder
Weight600 lb (272 kg) with fuel; 525 lb (238 kg) without fuel
Voltage120/240 VAC
Run TimeAbout 20 hours on 1/8 in. 7018 at 125 A, 20% duty cycle (22 hours with EFI engine)
Frequency60 Hz
ProcessesStick (SMAW), MIG (GMAW), Flux-Cored (FCAW), TIG (GTAW)
Fuel Capacity12 gal (45 L)
Fuel ConsumptionApprox. 3/4 gallon per hour welding at 150 A, 40% duty cycle
Lifting Eye Rating1280 lb (580 kg)
Rated Welding Output225 A at 25 V, 100% duty cycle; 250 A at 25 V, 60% duty cycle
Generator Power (CH730)Peak 11.0 kVA/kW; Continuous 9.5 kVA/kW
Generator Current (CH730)80/40 A at 120/240 VAC
Weld Output Range (CC/AC)40 - 250 A
Generator Power (ECH730 EFI)Peak 12.0 kVA/kW; Continuous 10.5 kVA/kW
Maximum Open-Circuit Voltage80 V
Generator Current (ECH730 EFI)88/44 A at 120/240 VAC
From the Miller Bobcat 250 spec sheet (Miller Bobcat 250 Owner's Manual — Section 4, Specifications (millerwelds.com) ↗). Check the nameplate on the unit.
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