update:

i have two of these engines both had no marks imprinted to say what size however they did have a bridge in the exhaust port up the middle. also only one had a hole above the exaust port that needed plugging as suggested. one has been lightened already now all i need is a lighter muffler for both and a prop hub for both.

Dave i also tried going down near where your house would have been but i didnt see it. so i think it maybe gone. one street over has older houses and another street nearby had new houses so i imagine the damage was sparatic after the may 9th tornado. thought you would want to know.