that's what is was i was running it to rich and the top end would fill up with fuel and would not turn over all the way, and i would take off the top end to free it up, i guess i had really really rich, does anybody have any ideas about a number of turns out? i tried everything five turns out, then four turns out, then three turns out all the way down to two! made sure the engine was good and dry every time before i started with a new setting to make sure it would not flood, like i said glow plugs good nitro fuel 27 persent oil 10 persent nitro brand new fuel! so i dont know, any advice would help.