20 Most Recent Bobcat Miller 225 Welder Generator 907209 Or 907210 Questions & Answers

Replace fuel pump.

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

check for all safety micro switches are operational--sit in seat , have bar pulled down , foot on the brake or hand brake on

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.

What doesnt speed up to weld? the feeder? is the wire burning back? are you getting any wire? this is gmaw / wire right? sounds like it may be running slow

do you have a clean connection on the battery terminals?

ethanol gas.... probably turned your fuel line to jelly

earth wire not connected to the job or welder properly

Timing is off. timing belt or chain. Could be loose bolt on distributor clamp too.

If it's the small, red, inline shutoff valve, just replace it. There aren't any serviceable replacement parts for it.

If the carburetor is ok, check the fuel pump. If it had bad gas in it, the tiny diaphragm gaskets within the fuel pump might be gummed up a little. You can check the pump volume if you remove the fuel line from your carb, aim it into a bucket or other receptical, and watch it pump. The gas should pulse smoothly with a little force. I'm not sure how to describe it, but it should be more than just a trickle, in other works. If your pump seems to be doing ok, and all of your fuel lines are clean and clear, the problem may be an intake manifold gasket leak, a carburetor mount gasket leak, or the intake manifold itself may be leaking. The intake manifold is two-piece, pressed aluminum with a sealant in between the two pieces. A leak at any of the three locations I mentioned would cause the problems you're experiencing. The fuel would of course reach the carb, but due to the any leaks, the vacuum needed would be decreased to the point that it wouldn't be enough to draw the fuel through the carb.

Hope this helps.
TW

Onan engine? If so, check your fuel pump. It will be located on the engine cowling. You'll see 2 fuel lines, one on top and one on bottom. These are the fuel in/out lines. The line you WON'T see is the vacuum pulse line that hooks to the rear of the pump assembly behind the cowling. This line operates the pump via a vacuum pulse created by the engine.
You can remove the pump mounting screws and the pump will pull away from the cowling a short distance exposing the vacuum pulse line. Make sure it's attached and not dry rotted. If the engine has set up for any extended period, there's a good chance the pump gaskets are "glued" to the pump chambers (internally) by bad gas and not allowing the vacuum to pump the fuel. Onan has (when I was working on them) kits for these fuel pumps and I've installed them successfully, but it might prove to be somewhat tedious if you're not well versed in kits of this sort or not extremely mechanically inclined. But if memory serves, a new pump was priced within reason. Good luck.

millerwelds.com will let you down load a manual for this unit, it can help you with this problem, also you can call miller and tech support should help

possible govener sticking needs cleaning and lubricating

You have 2 questions there. What is it you actually need?

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