joemyke,

The Ryobis with a two-piece crankcase are much easier to convert, but the ones with integral flywheel shrouds can be cleaned up nicely. It seems that the more-recent production runs used the one-piece casting. Such is progress![>:] Either way, once you get the hang of converting these engines, it goes quickly, with only minor metal work. You don't need a machine shop!

As you may have seen in my earlier posts, I'm all for accumulating a bunch of these engines; it's basically the only way you're going to get parts. True, Ryobis shouldn't be referred to as "high-perfomance" or "high-power" engines, but I prefer to stay well clear of the 18-8 prop on a running Ryobi! So, considering the dollars involved, Ryobis have plenty power and they perform quite well too. It all depends on what you want to fly and the kind of flying you want to do.

EZFLY