I would use a OS 46 ax ..That is a 2 cycle and if you are not very farmilliar with glow engines it might be easier to start with a two cycle...The OS 46 is a real user friendly engine...It is easy on fuel , quiet , easy to tune, quick to break in and has lots of power...You will get lots of opinions on this and thats okay...If you get any inputt from John Buckner or Grey Beard it is usually solid and worth listening too in my opinion...