Old Snap-on Welder

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My nephew was given an old Snap-on FM140A Mig Welder, and he brought it over to my house to have me look at it.  I hooked-up a bottle of C25 to it, then tried to weld with it. I maxed out the settings, and tried to weld a couple of pieces of 16ga. together, but the wire hit the metal red hot, and no puddle, just little red wires stacking up on the metal. Any ideas? Thanks!!
Reply:Bad connections or burnt diodes.
Reply:This may be your manual - it may help:http://www.800abcweld.com/pdf/fm140a_owners_manual.pdfMaxing out both wire feed speed and voltage is not a common method for setting up to weld.Do you have a good background in using a mig?Dave J.Beware of false knowledge; it is more dangerous than ignorance. ~George Bernard Shaw~ Syncro 350Invertec v250-sThermal Arc 161 and 300MM210DialarcTried being normal once, didn't take....I think it was a Tuesday.
Reply:My dad had a old snappy welder, we went threw several diode boards before we traded it for a Hobart iron man which was much better. It was a common issue with some of these machines. Good luck.Drivesector Hobart Handler 140Hobart Handler 180Ready Welder 2Hobart Air Force 400Airco Stinger 225Of all the things I've lost, I miss my mind the most."OZZY"
Reply:Snap-On welders are best used for dumpster filler.
Reply:I will think about that the next time I see one on Craigslist!-JessForney C5 Arc WelderLincoln Idealarc 250-250 Ac/Dc Arc WelderMiller Bobcat 225g PlusLincoln PowerMig 200Forney O/A Rig
Reply:Is the polarity reversed for flux core?Weld like a "WELDOR", not a wel-"DERR" MillerDynasty700DX,Dynasty350DX4ea,Dynasty200DX,Li  ncolnSW200-2ea.,MillerMatic350P,MillerMatic200w/spoolgun,MKCobraMig260,Lincoln SP-170T,PlasmaCam/Hypertherm1250,HFProTig2ea,MigMax1ea.
Reply:The "Snap on" welders made by Systematics are tough s.o.b's. Despite what any of the snobs have to say to the contrary.Eventual master of the obvious, practitioner of "stream of consciousness fabrication".  P.S. I edit almost every post because because I'm posting from my phone and my fingers sometimes move faster than my brain.
Reply:One of us snobs have priced "consumable" parts and have determined that Systematic makes junk.Last edited by vwguy3; 03-13-2016 at 07:09 PM.
Reply:I swapped the gas diffuser and now use Lincoln tips, insulators and nozzles. I just got a new liner for $30.Eventual master of the obvious, practitioner of "stream of consciousness fabrication".  P.S. I edit almost every post because because I'm posting from my phone and my fingers sometimes move faster than my brain.