I got this at a rc show and the guy didnt know what brand it was.

it has 3 rings, about a 30 cc engine
on the back casting it has a grey hound in an oval
and it looks like 3 penants in a square

Any ideas ?

It looks like a older Kioritz engine to me....not sure. Capt,n P.S. Google it!

I vote old Koritz too

yes, thats what it is.

I did a search after ther first suggestion and found a thread that had a spec sheeet.

Thanks for the help

Its a 40cc Echo.
Might have been my response in that thread.I have an original new prop hub and the spec sheet [sales pamphlet].
This was from a person in Ohio that had an engine,hobby shop combo.I know of one person here in the conversion forum that has one also.
Gibbs Hobby and Reaserch was the name.He custom converted Echo engines.
If ya need any help.hollar.