Possible clutch shoe problem?

[Finnster]

If the glow plug has gone bad, the engine usually wouldn't light at all. What %nitro are you running and what temp of plug? (ie cold, hot etc) Did you happen to take temps of the plug? If you look at the plug is it still silvery looking on the coil, or does it look more white? Is there a lot of black in the motor?

If you really think there was smoke coming out of the clutch area, its possible the F bearing is going out and is losing its seal, robbing you of compression and power.

Nitro engines are a freaking pain. So much little crap to break.