What Battery does my Miller Bobcat welder take I cant find any markings

google miller bobcat 250 welder generator manual

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https://www.manualslib.com/manual/1675586/Miller-Bobcat-250.html

If your Miller Bobcat EFI250 welder is not delivering fuel and you have already checked the fuses, fuel filter, and air filter, it is likely that the fuel pump is the issue.
It's possible that the fuel pump is electronic and it could have been affected by the drained and recharged battery. A low battery voltage can cause problems with electronic fuel pumps, so it's important to check the voltage and make sure it is within the proper range.
It's also possible that the fuel pump has failed and needs to be replaced. If this is the case, the best course of action would be to take your welder to a qualified Miller Electric welder repair service center. They will have the necessary tools and expertise to properly diagnose and fix the issue. The fuel pump may have to be replaced if it's not functioning properly.
It's also important to check the manual of the welder for troubleshooting steps and also check the warranty of the welder and see if it's still covered by the manufacturer.

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Why does my miller bobcat welder generator not stay at an idle when swithed to low idle, insted it goes back and ... Won't strike an arc,fuses ok brushes and slip.

The unit may need recalibrating the idle/run setting. Instructions found in manual at 8-6 (subaru engine) and 9-5 (kohler). Idle speed around 2200rpm. Simple screw adjustment. PDF manual here :- http://www.millerwelds.com/om/o4434l_mil.pdf

My welder will only run above full at full line it dies why

It might be missing a stabilizing spring on the the throttle shaft to eliminate accumulated play in the components.

Otherwise if no smell of leaking LP is noted, there may be a small vacuum leak in the induction system- can be found with carb cleaner on an idling engine- the area of such a leak when sprayed will smooth out the idle and speed it up momentarily.

If you do smell LP, the regulator likely needs repair or a hose needs replacement..

I had a problem like this a few days ago try taken of the air filter to were u can see the choke it may not be opening rite just cause it opens don't mean itsnot opening rite get a small spray bottle put gas in it and as u start ur welder spray the choke with with the gas a lil if it starts turn ur switch to run for while it workd for me if that don't maybe change the spark plugs

Depending in the city you are in. Here in N California the average price for the Miller Bobcat 225 is 3,425.00. Try your local Praxair Distribution welding store.

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Check the oil safety switch maybe it is bad. It will stop running if low on Oil or wont start.

Hi Louis, the battery sits on the bottom of the unit, just inside the rear right side service door.
if you were to look at the machine from the back, it would be located right in the middle on the bottom of the unit.