Hi Krusty, Just to let you know that my own Scotty 45, a 17", Series 2, twin rail machine has a Honda G100 2.5HP fitted and I have never looked back...My particular model Honda is no longer available, but it bears out what grumpy has said, cylinder mowers do not need the same amount of horsepower as a rotary to do the job....
Honda....first pull starts...every time, if carefully maintained...
cheers

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin