I have had four Magnums, two 52's ( one was so bad I returned it they gave me another, I would have preferred a refund but no-go) a 91 and a 15, the 15 is very easy to start runs great and has plenty of power, the 52 are very powerful for their size, but they never run consistently during hot weather the dead stick regularly, the 91 ran great at first but now it is had to get a good idle and it will dead stick quite often, I would never buy another magnum again, I bought all of these engines when I was starting into the hobby but now I know better if your going to go glow, use a YS or a Saito, now I really prefer gas anyway..