Hi Manch, the Honda GX120 (if made in Japan) would be an ideal conversion for your Scotty....3.5Hp @ 3600RPM. Check out the specs: Click HERE and yes the conversion was an easy exercise; my Honda Dealer helped me get it sorted. First pull starting...every time!!
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