Well, I thought I had it figured out and the plane ran flawlessly for one flight then I refueld and cranked it up and attempted a take off and the dam thing just quit, I did minor adjustments to the high end first which didn't fix it so I adjusted to low end and it still didn't help, I can get it to run just fine at idle and max then after about 3 minutes or so it just quits.......i don't know what to do now.....I'm considereing just getting a brand new engine.[:@]

One more thing how can you tell if the motor is the 1st, 2nd, or newest type of OS 91 FX..????