Need opiniion on OS MAX 91 SX-H RING Engine...

[Deano]

I have a chance to get an OS Max 91 SX-h Ring heli engine new for cheap. Can anyone tell me anything about this engine?? Is it discontinued, is it a good running engine, hard to tune ect...???
Thanks :?

[DavidH]

The original OS 91 SX -H heli engine is no longer made.
The OS 91 SX- CSpec tooks its place. This engine has a black crankcase.

http://www.osengines.com/engines/heli.html

I never really saw but a couple of the OS 91 SX H 's being used. I was not impressed. I do use the OS 91 SX CSpec engines and they both perform great.

David