Airco big40

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Found a 1978 airco big40 was used at highway dept maintenance shop since it was new. It was sold at auction to a farmer down the road a few years ago and he never uses it. My dad works at hwy shop and knows the history and says well worth getting it. He wants 1000 bucks for it. It has the red seal engine just like my sa200. Can anyone tell me if it's worth it? ThanksMiller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:If they're anything like the Miller Big 40s, nothing special! Just another welding machine.Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:I need something to arc gouge with. The big40 is 400 amps right?Miller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:It would be perfect for arc gouging! Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:That what I thought. What about tb 302?Miller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:I don't know anything about the Trailblazer 302. Only Trailblazer I ever ran was a 55D.Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:Thanks,CEPMiller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:I read in your thread about your 301G weak arc that you have a 1976 SA-200. I have a 1974 SA-200. A Miller Big 40 welds about the same as my 1974. But not even on the same planet as my 1964, or 1966 Red Face SA-200s. Does that Airco Big 40 look something like this? Attached ImagesDon’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:That's good to hear. I've never ran the older red face. Maybe one day I'll get to. I'm pretty sure that's the look of the airco big 40Miller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:Back in the late 70s early 80s seems like all you seen on heavy civil construction sites were Miller Big 40s. I think the reason was, purchasing agents who didn't have a clue were buying them because they were cheaper than the SAE-400s. In my opinion there is no comparison between the SAE-400s and the Big 40s.Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:I don't see a lot of sa/sae's around my neck of the woods. I guess cause there's not too many pipeliners here. I do know where an old sa200 is. It's pretty rough but I should try to get it. Not sure of the yearMiller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:I think the octagon barrel SA-200s came out mid 1973. Lincoln really stepped in it there! Don’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:How hard is it to find the (early) ones?Miller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:A welder mechanic told me I should stay away from diesel welders because of expensive repairs but I'm not one to neglect an engine. Main problem I'm having is circuit boards.Miller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:Originally Posted by BlackbeardHow hard is it to find the (early) ones?
Reply:Originally Posted by 7A749Millers early AC alternator DC rectified engine drives.
Reply:Here's pics of before and after painting and building muffler for my sa200. Had to put it in place of my trailblazer on my main welding trailer.Miller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:Yup, that be a green light. Just like mine.  Attached ImagesDon’t pay any attention to meI’m just a hobbyist!CarlDynasty 300V350-Pro w/pulseSG Spool gun1937 IdealArc-300PowerArc 200ST3 SA-200sVantage 400
Reply:That looks good CEP, I know it didn't look that good off CL!Miller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:Originally Posted by BlackbeardThat looks good CEP, I know it didn't look that good off CL!
Reply:That green light is busted on mine light still works though. I was gonna get new face plate but the serial number was beat out on mine, NO I didn't steal it! My dad bought it from a guy's widow back in about 86 who may have, we'll I don't know. I did go with him to buy it after the man passed away. Anyway I wasn't sure I could get one without s/nMiller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4
Reply:Originally Posted by 7A749Now stop making me drool all over myself showing pix of those sexy Lincoln's you have......
Reply:I don't know the s/n to it. They beat it out with a chisel or somethingMiller trailblazer301gLincoln sa200Miller251Miller spectrum 625Victor oxy-acc2002 Chevy duramax 3500 dually 4x4