Just wondering if anyone could identify this engine. The carb must have mounted on the backplate which is missing. Any info would be helpful

Ryobi 31 cc

Yep. Ryobi 31cc. I think I have backplates if you need one. They have a reed valve in them, and yes, that's where the carb mounts too.

AV8TOR

Yes I do need a backplate and a prop hub if you know where to get one. Let me know what you need for the backplate. Thanks

Carr Precision http://www.carrprecision.com/Pages/prod02.htm

Make a precise measurement of the crankcase inner diameter and let me know. There are two different backplates for them, one slightly bigger in diameter of the portion that goes into the crankcase. From the photos, I believe yours is the bigger diameter crankcase and backplate.

AV8TOR

Ok, Ill measure it when i get home this afternoon.

I'm getting an inside diameter measurement of 2 3/16ths

Ok, I'll see what I have here tomorrow. I am not at my normal home where I know I have some, but I might, (hopefully) have one here where I am as well. I'll let you know.

AV8TOR

Bought one a few years ago with the intention of converting but once I saw the pressed sheet steel connecting rod; put it back together and sold it as a leaf blower.

They are actually a pretty good engine if you limit the rpm to 7500 with the correct prop on them. It's a nice conversion engine for narrow cowl airplanes like Tiger Moth biplanes and Mustangs. I have one in a big Tiger Moth and it works great.

AV8TOR

GHENSON: I have a backplate for you and I sent you a private message.

AV8TOR