I agree with Francis!

I have a .19BR in my Lazy Bee and I love quiet power I get from a 10x3 or 10x4 prop. It's so simple once you get the hang of it. They do seem to take a while to breakin though. The LazyBee would be perfect place to start with a diesel. I was told that a PAW.15 was Andy Clancy's fave engine for the Bee.