the os .46 max fitted in my nexstar will not idle at slow speed. i got to the field again today but after 2 hours myself and a guy from my club could not get it to start. for the last few flights i had last week on this plane every landing was deadstick one landing damaging the plane. i tried to tune it when i got home but it still would not start. the only way it would start was to use an electric starter and after about 2 seconds remove my finger., but after it runs for about 3 seconds cuts out again any suggestions on what could be wrong?