expedition2166
Well-Known Member
does any one know what modifications were made to the 18 hp onan engine to make it strong enough to perform like it did on this lil bird im starting to think bout a 20ish hp honda v twin and im starting to consider it as a possibility i know hp/ torque values play a massive role in this but im not sure the internal mods required to accomplish this aside from mayby adding a good thrust bearing and maybe beefing up the side cover since it will be a tractor type and curious on props / mainly pitch i know i wont be able to go much more the 33in due to clearance any help or ideas on the matter????
