Been doing a bunch of reading about SA200 welders since I started this thread. From what I have read, not all oct. Barrels came with aluminum shunts. seems some of the early ones did have copper shunts. Dont know if that is the case with the one we are discussing and wont know until it is torn down. mostly I have been looking at common problems and possible repair/parts cost. I figure if I have to take the head off to get it unstuck, I might as well build it. A simple rebuild would be around $500, but add machinings such as boreing block, valvejob, decking block and heads, etc, probably closer to $1000. Carb rebuild, Magneto work could add a few more $hundred. Anyways, unless engine is complete toast, should be able to get it running for Under $2grand. The 2 grand being worse case senario but it would be all new. Then we have the generator, What a barrel of fish hooks. New shunts, $500, New Exciter coils, $600. Only can hope the armature is good. I priced a bunch of other stuff too. Anyways, i could easily spend another $1-2 thousand on the Generator. I havent even thought about my labor. Whew! I guess, now the question is, If i do all that and the machine runs/welds perfect. What would it be worth?