I have a different type of Ryobi engine that I converted quite easily. This one has a side mount walbro carb. Yes, side mount, not rear. It is on the crankcase left side if you are facing the rear of the engine. Has anyone found one of these and if so, what size is the engine? Seems to be about 30 CC. When I first converted it, it flew a 4-120 bipe modified into an Ultimate 4-120. Since the engine has about 100 hours running time on it, the compression is low, due to a worn ring/cylinder. Maybe just the ring, didn't disasemble it yet to see.
It has one of my own ignitions on it from the New CDI forum, using a grey Zenoah coil. Is it possible to get a new ring for this engine without sending Farnk Bowman the cylinder & piston? I would like to fit it with a double ring piston but haven't found any from previous Ryobi's that will fit it. Any suggestions? I'll post a picture of it if needed..also looking for another cylinder for it. Other Ryobi's have a different cylinder from mine since mine is also side exhaust. I have never seen any like it since. It came from a small blower about 10 years ago. Any help would be appreciated..

Thanks...
John