I noticed a very nice conversion in the Gas engine forum. Take look....Capt.n http://www.rcuniverse.com/forum/m_4562011/tm.htm

Captain,
It looks a lot like a big G20.

Dave

Dave: I wonder what piece of lawn powered tool the G20 engine is on also? May be a good source for a good uesd 20 cc engine at a good price later. Smooth Landings Capt,n