My cylinder was trash
So here's the difference between. The craftsman, ryobi clones and a few other brands 10 something years ago. They were actually licensed from zenoah to be produced. Best part about them (at least the ryobi) if the China plant ran out of parts they would get them from Japan till they could get the clone stuff again. I have a real gz4000 then 2 ryobi clone saws that have Japan engines in them. You should be able to see the casing marks on the cylinder and figure out if it's a clone or zen engine.Really liking my RedMax G3800, GZ4000 clone. Made by Panier in china for MTD it is a copy of the redmax. The ryobi, black max and craftsman saws are practically the same with the exception of the ryobi and blackmax requiring 50:1 vs the craftsman requiring 40:1
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