Roger, IMO you've hit the bull's eye

. At one time, when I saw a Ryobi I said "EL YUK." Now that I'm retired on a "fixed " income I'm singing that tune in reverse: "KUYLE" as in cool.

OK all you Ryobi enthusiasts, I've come clean; hope I'm forgiven!
As to my "throw-away" remark above (didn't I just say "I've come clean"- YIKES!), this has been covered several times before ( ck TKG of C-H Ignition, for example).
If you can, stay away from Ryobis that were exposed to rain. Moisture in the crankcase is bad news. Extent of corrosion depends on how long they've been wet.
Finally, to paraphrase Lucy (Peanuts): Don't take Ryobi conversions too seriously.

Enjoy, EZFLY