Hi I just picked up a Ryobi enging from a friend, he found this engine at a yard sale the man told him that he did not know what cc it was. So I would like to know how do you identify this engine.



Thanks

Moved to Conversion Engines Forum.

http://www.rcuniverse.com/forum/forumid_92/tt.htm

It looks to me to be a "early" model 31cc. This has a smaller crankcase but can be desirable engine. Flathead 4

Yea i agree with flathead. This definatly looks like the 31 cc ryobi with the small dia case. It has the step in the case that is a dead givaway for the small dia. I bet if you take the backplate off the end of the plate will be flat with the reed valve resessed into the backplate. I have just recieved one of these engines and have yet to do some testing on this engine But i see no reason this houldnt be a good one.

The engine mount apears homemade

I am really interested in the muffler as i have never seen one like this. Is there any markings on it that might indicate who made it? can you get some more pics of it on here ?

It's just a standard early model short shaft Ryobi of 31 cc. It probably began life as a Ryan or Lawnboy string trimmer.

It would be a good engine for your Bridi Stick

You might want to put a different rear mount on it. You can get them here http://www.carrprecision.com/Pages/prod02.htm
# Ryobi 31cc 2-cycle motor mount with screws - $ 25.00

# Ryobi 31cc carburetor spacer with gasket - $ 8.00