Appears to be a closed port 46cc chainsaw cylinder. It looks like the older windowed piston type with one big loop transfer on each side. What I'm fumbling with is the step design of the top of the cylinder and the fact that the spark plug is on the front instead of being on the same side as the carb like most chainsaw engines?
Last edited by w8ye; 03-19-2015 at 07:04 AM.