Hello. I will describe my problem, namely, not equal to the work of the engine, it walks like a tractor, shakes, but the revolutions are ok, do not waver, no power, no error is displayed. All controls go out. I would like to add that the middle and end silencer are exchangeable, they are holey. The silencer does not fly a single balloon (a pair), it is only thrown away as if something were closing and opening. Someone will tell you something?