The old McCullough PM-6A weighed in around 7 lb, dont know the displacement.
A current Redline saw is around 1.5 cubes, and gutless at 1.1 hp, weighs 6.4 lb, likely the lightest ever. They have quite a budget for ads, I guess, as I see lots in arbo pubs. That saw would be way slower than a good sharp Silky, especially counting the grab, position, and crank time.
I'm regretting my purchase of an Echo 3400 for $87 on ebay. It is pretty new, but just so darn gutless, compared to my hot 335, even the stock one. Anyone want it for $107 including shipping? I'll even throw in a new chain and workable bar, unlike the messed up one I got with it.