My magnum 100l is flowing gas even when the power is off. How do I get it apart to look inside?

Sounds like float needle is sticking. I use an ear bud with some metal polish on and polish out the seat so needle can move freely. Make sure floats are set to parallel with base of carb just as needle shuts off fuel flow.

It's probably mounted inside the gas tank. A lot of them are these days. If the fuel pump is locked open ( you can get gas to flow from the tank) you can put an inline fuel pump on it to repair it. Hope this helps

Hi:

This could be a problem of gthe gas you are using. Make sure to use mix 75/25 argon/CO2 for mild steel welding, argon 100% for aluminum and trimix helium/argon/CO2 for stainless steel.
Also check your heat (voltage) 16-22 is enough for weld of most steels less than 1/2 inch.

With starting fluid, it runs, so this means spark and compression and valves closing properly. You mention gas flow, so gasolene is getting to the carb. This would then leave the problem being in the carb if indeed fuel is present at the carb. If you take apart the carb right now, is there fuel in the bowel? Or, remove the bottom screw on the carb, does gas flow out? Does it flow continuously or does it quit? This will indicate if the float valve is indeed opening. The only thing if you have fuel in the bowel and no start, even with the choke closed, is that the main jet must be plugged. Had the unit been sitting for quite a while with gasolene in it? Gas can "varnish" after a few months and this can cause plugging of the jets and other passages. How old is the gas in the unit? Old gas won't burn in the engine and this can also be a problem. Drain the tank, and carb, put some new gas in the unit and try it. You might have to take the carb apart again and use some carb cleaner to blow the **** out of all the carb passages. This should get it going again. Now, most important, when you get it running again, you need to adjust the engine speed so that you do not burn out any electrical equipment. If you have access to a frequency meter, plug it into the 120 volt outlet on the generator and adjust the speed so that the frequency with no load is 62 - 63 hz. This will allow the generator to drop to 60 hz under load. The adjustment is a 5/16 nut, right side of the upper engine, facing you.

check your ground wire everywhere its grounding out somewhere change the liner in your gun

Motherboard may be fried. Try running without the battery installed and on AC, and with battery and NO AC.

It sounds like you have a bad AC adapter . When you plug it in to the outlet in the wall and into your computer , do you see a charge indicator light on the computer? I'm asking you this because even with a bad battery your computer should operate without any problems with the AC adapter plugged in.

Kindly remove the ram and clean it and fix it again.

Gonna be expensive About $125-$200. Sometimes its cheaper to get a new unit. They sell for about $300 on Ebay. I believe this will work on your unit Its $85 on ebay.

http://cgi.ebay.com/Lincoln-Magnum-100L-MIG-Gun-Replacement-10-150A_W0QQitemZ330349527430QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item4cea5dc186&_trksid=p3286.c0.m14

Couldnt tell you if its going to solve your problem but you can get a cheaper replacement rechargeable battery here - Dell 100l battery, also good for the inspriron 1100 and 5100 range