ORIGINAL: DenverJayhawk
So to get the equivalent power from a 4 stroke that my OS 95AX turning a 15x6 prop is making, I'd need to go with at least a 1.2 four stroke? Maybe more?
If you go to the OS Max website, they list the HP and RPM range for all of their engines. I have found this very helpful.
http://www.osengines.com/