Skynyrd Man, I couldn't really say how the SK engines are, because I never ran the eighty I just sent it back for the swap. But if you go to Kangke's website they have a specs page for the engines & they looked good to me, they seem to produce a little more HP than other engines of relative size and the price is cheap! $49.99 for the 50 & $79.99 for the 80. I will say the engine looked like a good one to me, and they come with an optional remote needle valve that you can choose to use or not. (Fingers are softer than props!)