Miller Bobcat 250 Portable Welder Generator

What is the maximum welding output and duty cycle of the Bobcat 250?

The Bobcat 250 is rated at 250 amps, 25 volts, at 100% duty cycle in CC/AC and CC/DC modes. In CV/DC mode, it is rated at 275A, 25V at 60% duty cycle, or 250A, 28V at 100% duty cycle. Exceeding the duty cycle can damage the unit and void the warranty. (Page 16)

What generator power output is available from the Bobcat 250 while not welding?

The Bobcat 250 provides a peak of 10.5 kVA/kW and continuous output of 9.5 kVA/kW, single-phase, at 84/42 amps, 120/240V AC, 60 Hz while not welding. This power is available at the generator receptacles. (Page 12)

What engine oil should I use in the Bobcat 250 at initial setup?

The unit is shipped with 10W30 engine oil. You should check all fluids daily with the engine cold and on a level surface, and do not exceed the 'Full' mark on the oil level dipstick. Use the correct grade oil for cold weather conditions to improve cold weather starting. (Page 18)

How do I properly connect the weld cables to the Bobcat 250?

Stop the engine first, then connect the work cable to the Work weld output terminal and the electrode holder or weld cable to the Electrode terminal for Stick and MIG welding. Remove the supplied nut from the weld output terminal, slide the weld cable terminal onto it, and secure with the nut so the cable terminal is tight against the copper bar — do not place anything between them. Failure to properly connect weld cables may cause excessive heat, fire, or damage to the machine. (Page 21)

What should I do before connecting or disconnecting the battery on the Bobcat 250?

Always stop the engine before disconnecting or connecting battery cables or servicing the battery. When connecting the battery, connect the negative (−) cable last; when disconnecting, remove the negative (−) cable first. Always wear a face shield, rubber gloves, and protective clothing when working on a battery. (Page 20)

How should the Bobcat 250 be grounded when mounted on a vehicle?

Connect a grounding cable from the equipment grounding terminal on the front panel to the metal vehicle frame using #10 AWG or larger insulated copper wire. Electrically bond the generator frame to the vehicle frame by metal-to-metal contact. If the unit does not have GFCI receptacles, use a GFCI-protected extension cord. (Page 17)