Hi All:

     I would like to know how I should run this engine for stunt use.

     I have been running a 9X4 prop and setting the engine to run at a very fast 4 cycle on take off.  I am of the beleif that this is how this engine should be run.  In the air it beaks into a very wet 2 cycle and stays there during the entire flight.  I am running a Uniflow tank that works very well.

    I think that I have read that these engines should be operated on the lean side to enable them to run at the correct clearences due to their construction materials.  Can these engines be damaged by running too lean?

    I am running 11,11 oil, and 10% nitro.

    Thus far, I am very well pleased with this engine!

                                                                                                                         Tia,

                                                                                                                         Frank

  "  I think that I have read that these engines should be operated on the lean side to enable them to run at the correct clearences due to their construction materials.  Can these engines be damaged by running too lean  "


Hi Frank

Yes they can be damaged by a too lean setting, as can any engine. So be careful with a too lean setting.
Try to run a wet, or rich 2 cycle with the Brodak 25, or they will do a 4/2 break, you are going to use between 4 and 6 inches of pitch, depending on how you run the engine


Randy