I thought it might be the newer version. Funny how Craftsman called it a 32cc engine. I have several of the older versions in boxes that I have gathered over the last year or two. Since this crankcase has the mounting for the weedeater covers and fuel tank, it will require a lot of grinding to get down to size. I was thinking that I might take one of my short shaft crankcases with the bolt on type mounting and just modify the entryway for the transfer ports to match the one on the original. A couple minutes with the dremel should do the job nicely. I already have a prop hub for short shaft engine. Since I will be using electronic ignition, I will cut the center out of the the flywheel and mount the magnet to it. The hall sensor is mounted to the crankcase using a hose clamp with the sensor mounted to the clamp with 2-56 bolts with the heads ground down. I already have one Ryobi flying with this setup and it runs well. Flies my 14+ lb 4 star 120 with ease using an 18x10 MAS Classic prop.

This engine had noticably more compression than any of the other Ryobis I have had. Plus the exhaust port is not bridged. So this one should do well. I wonder if there are more of these floating around out there. My friend bought it only a year or two ago.

I have a set of plans for a 30" electric Miles Magister drawn in cad that I have enlarged to 80" that should be perfect for this engine.

Jim