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Miller Bobcat 250 with Kohler engine shuts down when switched to run/idle position. Will not run on idle.

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Email me all the info on

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Posted on Feb 09, 2019

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mamicheddy

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SOURCE: miller bobcat 250 welder with kohler lp gas engine

Make sure that the idle is set at 40Hz. You do this by placing a frequncy meter on one of the 120Vac outlets. If frequency is low, the engine will run rough at idle. There is a 3/8 nut next to carberator that needs to be turned to the right to increase the idle speed.

Posted on May 13, 2009

John Short

  • 4 Answers

SOURCE: how to separate the kohler engine from the

The shaft is tapered and will have a bolt in the center, loosen the bolt enough so you can tap on the end of the bolt. This should release the shaft, if not there should be 2 hole that you can thread a bolt into to push the connection apart.

Posted on Jun 26, 2011

John McPherson

  • 1212 Answers

SOURCE: miller bobcat on propane surges when turned to idle

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..

Posted on Sep 25, 2012

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1 Answer

225Bobcat gen.runs but will not excite when trying to strike arc


#Tags bobcat 250 welder service manual

coop.bounceme.net/term/bobcat-250-welder-service-manual
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.

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My welding machine will not idol down .Only stays in high idol. Why won't my machine idol back down when not welding? Yes I have the switch on run / idol lol 225 bobcat miller Kohler engine


Possibly the idler control circuit board. I changed out my fair share back when I worked on them. Also, check your idler solenoid. I can't remember if those pulled in to idle, or pulled in for high RPM's. May be something as simple as rust on the solenoid plunger.

Dec 15, 2014 | Welding Tools

1 Answer

My welding machine will not idol down. Only stays in high idol . Why won't my machine idol back down when not welding? Yes I have the switch on run /idol lol 225 bobcat miller Kohler engine


put 12 volts to the coil and see if it pulls in. Could be coil, idle module, ignition switch, or wiring. Get a 12v test light and trace it.

Dec 15, 2014 | Welding Tools

1 Answer

I have a miller bobcat 225 is lower power while welding, any idea?


First off, check all of your welding cables to make sure they're in good shape, then check for tight cable connections. Is your machine staying at low idle speed while trying to weld? If so, Switch the idle select into the 'weld' position and make sure the high RPM's initiate. Try welding again. Better? Could be a number of things, if not.

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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 forth to high then to low idle?


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

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1 Answer

Miller bobcat on propane surges when turned to idle


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..

Sep 14, 2012 | Bobcat Miller 250 Welder Generator 907212...

1 Answer

How to separate the kohler engine from the generator of a miller bobcat 250


The shaft is tapered and will have a bolt in the center, loosen the bolt enough so you can tap on the end of the bolt. This should release the shaft, if not there should be 2 hole that you can thread a bolt into to push the connection apart.

Jun 25, 2011 | Bobcat Miller 250 Welder Generator 907212...

1 Answer

We lost the manual and can't find the hours of usage on the miller 250 bobcat serial #LH005560.Where would we find it on the machine?


Hour Meter: With engine off, place Engine
Control switch in Run/Idle position to view engine
hours. Meter is located on the front panel in the top right corner.

For more help see page 23 of this document:
http://www.millerwelds.com/om/o4419m_mil.pdf

May 09, 2011 | Computers & Internet

1 Answer

Miller bobcat 250 welder with kohler lp gas engine won't idle properly any adjustments for air/fuel mix?


Make sure that the idle is set at 40Hz. You do this by placing a frequncy meter on one of the 120Vac outlets. If frequency is low, the engine will run rough at idle. There is a 3/8 nut next to carberator that needs to be turned to the right to increase the idle speed.

May 13, 2009 | Miller Welding Tools

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