i have a rustler, and it will run for about ten minutes then stall. i know im not running it too lean becuase there is blue smoke comming out the exuast. the mixture is right. i dunno if i broke it in right but the motor is pretty old. its a .15 i pretty much have at full thorrotle 65% of the time. is this normal? i'm i not warming it up right? but i use blue thunder fuel and it is formulated to shut your engine down before damage from running it to lean can occur. is that why? i have a nice cooling head. and its about 75 degeres out side. the motor is very hot when it stalls and the manifold smokes. i think that is becuase of the carbon build up on the out side. it was doing this before i took the baffleing out of the exuast.( i dont have the tuned pipe) and it still is. whats wrong?