Hi,

An OS 55AX should be OK since it is after all rather powerful engine with 1.68 hp at 16000 rpm. That is morehpthen an old Veco 61 and Webra 61 Black Head that was used by Jim Withley in the early Daddy Rabbit versions (I think he used Ross 61 in latest version X and maybe it was close to an OS 55AX in power).

http://www.osengines.com/engines/osmg0556.html


Then You have Jett SJ60 LX high performance engine that is seize of OS.46 engine - that should take care of seize and power.

http://www.jettengineering.com/


/Bo