Tiger .61 trouble

[Spitfire13]

So I bought this already made Hangar 9 spitfire from a friend, and I have been struggling with the engine. Finally, I have been able to get it to idle, and full throttle without dying. However, I went today to fly it, and as it accelerated, the engine sputtered, then died. Before I had it tuned to run just at full throttle, and it flew fine, and thought maybe the cowling needed a hole to allow air into the carb (I really needed to adjust the idle screw....I'm new to this). Anyway, so I cut a large hole in the bottom of the cowling, and I am wondering it this is what causes the the loss of power only as the airplane speeds up since I have no out flow hole. Could this be the reason? What are the rules for cowling holes? I broke off the retract as the engine died 10 ft off take off. Know where I can get another retract for this?
Thanks for the help.

[tandemairbike]

I am assuming that the engine is used before you aquired it and that it is an Evolution engine . You say you are new to this so I will try to help you if I can.

First off you need about 10 to 15 % nitro in your fuel . If you don,t have this blend, you should buy some. If your fuel is old, discard it and use only fresh fuel.
Next, after assuring that the fuel is as stated above, start the engine and leave the glow driver attached while you tune the high speed end. After just out of four stroke mode to smooth steady two stroke mode, remove the glow driver from the plug. If the engine slows down appreciably the plug you are using is too cold and should be replaced with a hotter plug.

If this is the Evolution engine installed in the Hangar Nine 'Spit, you can contact the distributor, Horizon Hobbies or go to <evolutonengines.com> They should have a "contact us" link where you can request an owner's manual for this engine. Horizon Hobbies can probably fix you up with new landing gear too.

In the meantime, close your low speed needle all the way. Now back it out two and one half revolutions.
Start your engine and set the high speed needle for proper running at full throttle.
Now slowly close the throttle to the point that the engine stalls. Pay close attention to the sound of the engine just prior to stalling. Restart the engine and again close the throttle to just above the point where it stalls,.Now close the low speed fuel needle until the engine speeds up slightly. you can now close the throttle a little more and repeat the needle adjustment again until the engine speeds up slightly. Continue doing this until the engine idles properly with the throttle lever all the way down and throttle trim in the center and then dies when the throttle trim is moved all the way down. This is optimum idle setting.

Be sure your fuel is fresh and hot enough(enough nitro) and if your plug checks out too cold by the previously mentioned test, try a Fireball hot, long glowplugfrom Swanson Associates P.O. Box 151 Wayne, New Jersey 07470

Other things you might check are: Is the throttle mounted tight to the engine and have a good gasket or "O"ring. A leak here can bring greif.
Check cylinder head screws to make sure none are loose. Loss of compression can make carb adjustment a nightmare. If this engine has a seperate backplate check these screws and gasket.
Check if the motor is loose in it's mount or if the mount is flexing.

Please reply and let me know if this helps.

Tandy

[tandemairbike]

You titled your thread"Tiger .61 troubles" Is this a Supertigre .61 engine?