RE: ECHO SRM 140D Weedwacker
The Kioritz engines are lightweight and powerful, and normally good conversions. However, I'm sorry to say that yours is either a 14 or 16cc engine I am fairly sure. I did one of these a couple of years ago. I had done some hop ups to mine, so it had more power than originally, but it really is a small engine for a gasser. It flew ok on a 10 lb. airplane at sea level, but when I moved to an altitude of 4500', it was definitely underpowered. If you aren't too high in altitude, it would probably fly something similar to a Cub ok. Better to go to a larger engine all in all.
Sorry,
Av8tor