Saw a post on here about a Sa300 in northern Alberta. I have a later 300 with the F227. I think the year of manufacture was 1973 if memory serves. Great old welder. Use it daily. Started to have problems with the carb. It is a zenith with a power valve so i don't think it is original. The books show both a zenith and a Marvel/Schebler. Kind of looking for an original Carb that would be rebuildable. Searched all over the internet and have found a lot of tractor Carburetors but few welder Carbs. The throttle shaft on the welders is longer.