I think you need to stay away from ANY welder that does not convert over to DC. Most 115V units are AC and are hard to weld with because of the alternating current they fluxuate and the weld doesn't come out as nice and uniformed. . Most welds that are AC aren't as strong either. (The welds used on Submarines are from DC machines because they are more pure with less defects).
Most 220V units convert the AC over to DC.
I'm looking for one also so what ever I buy will be a DC unit with gas.
I looked at those last weekend at Home depot and I wasn't too impressed with any of those. I think with a Lincoln unit you are going to have to spend $800 or more. A Miller will cost more but they are some of the best on the market.
Just my 2 cents worth.
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1991 V-20 cuddy I/O 350 volvo duo prop, 1998 15ft Grumman 9.9 Johnson 
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