I have a 120 size Sea Master (ws approx 85.5 inches) which Ibought second-hand some time back. I'm just now trying to set up for some flying. I didn't realize until recently that the engine which came with the airplane had never been installed on the airplane. It's a Zenoah G-38 on a (huge) stick (pylon). With the engine mounted exhaust up, the 18x10 prop clears the deck by less than an inch. With the engine inverted, the pitts-style muffler pipes are about 2 inches off the deck. I can tell the engine has never been attached because the pylon doesn't fit into the pylon slot fully. Still needs some signifcant trimming.

The Zenoah G-38 weights in at hefty 4.5 lbs and looks very much out of place whether exhaust up or exhaust down.

I am trying toconvert togasoline for all my airplanes and therefore I'm not interested in large glow (or especially) electric engines.

I've been trying to research optional gasoline engines for the Sea Master. I have a brand new VVRC 20cc engine, but am not sure if this would have enough power to fly this large seaplane.
Icompared HP ratingsand found VVRC 20cc is rated higher than the G-38, but then Iread other threads which state HP ratings are meaningless. Hence Iam baffled on where to turn.

I'd appreciateyour suggestions.

thanks
dave
I'm afraid if I buy much more RC stuff, my wife's eyeball rolling wiill become somewhat permanent.