Older Miller wire speed and welding problems.

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I have not used my mig for several years and now I find that the wire speed needed to weld is way down to 4. It is not a good weld, it stinks actually. Normally with my heat settings, it should be set at around 7. Any suggestions what to look for?
Reply:Welcome to the forum raceaholic. A little more information is needed.Model (at least) and SN of unit?Filler wire type/size?Material being welded?First thing that comes to mind is dirty range selector contacts or poor contact at cable connectors (depending on specific model).MM200 w/Spoolmatic 1Syncrowave 180SDBobcat 225G Plus - LP/NGMUTT Suitcase WirefeederWC-1S/Spoolmatic 1HF-251D-1PakMaster 100XL '68 Red Face Code #6633 projectStar Jet 21-110Save Second Base!
Reply:could be polarity too, flux core or gas?face all times with a positive mental attitude,then and only then will you have done your best.
Reply:It is a small 120v with 75% argon gas. Mild steel at .100 -.150 Usually welded great at highest setting with 7 wire speed.
Reply:Thanks for any suggestions! Spent all day on you tube... no help but I did get some good welding tips! LOL
Reply:Try this video . . . http://goo.gl/g4TNfW  . . . a good procedure to set voltage and wire speed.Dynasty 300DXSmith He/Ar gas mixerMM350PHobart Handler 120Smith LW7, MW5, AW1A
Reply:Originally Posted by raceaholicThanks for any suggestions! Spent all day on you tube... no help but I did get some good welding tips! LOL
Reply:First thing to check is the gun liner. Take it out and blow it out with compressed air and put it back and try again. If it's ANY better buy a new liner.metalmagpie