a 54cc poulan would really talk to you on an 18# bipe I am building a new 60cc poulan for my wild hare ultimate , I just put one on a wild hare edge and it hovers all day and pulls straight up only thing this engine had a lot of time on it in the saw I was going to put a new cylinder kit on it but it flys great the way it is , just some other engine conversion to think about.