I have had both my OS .91FX and my Magnum 1.08 (ABC) in my Joss Stick. I really count reliability and smooth running above anything else, but in this case, the same engine has both reliability and power.

The Magnum 1.08 with a 16-6 prop is the better engine. My Mag starts by hand in usually 1 backwards flip. I have never touched it with an electric starter. I have it set to leave a slight smoke trail in flight and it runs great all through the tank, although my neck wears our in 10 minutes.

My OS .91FX (ringed with a 14-6) needs an electric starter. It never has run very well in the air which is the reason I took it off the Joss. I recently picked up a K&B .61 remote needle valve assembly which is supposed to stop the air leak around the banjo area. Yes, I have tried silicone gasket material. A buddy who has one has tried the K&B assembly and reports it makes the engine run a lot better.

I would not hesitate to buy another Mag 1.08, although I might go for the newer .91XLS or the 2nd edition 1.20. I will say, the OS .91 weighs the same as a .61 and will drop right in.


You also can not beat Global service if you ever have anything go wrong with your Magnum engine.