Well, there goes my theory about bad fuel. Flown my old trainer (TT .46 Pro) with the old fuel with no problem whatsoever. I have to say that the TT .46 is probably the most reliable engine I ever had. Bought it used, been in several planes, at least twice ended up in a lake and yet still fires as if it had been just taken out of the box. Next I will start checking the lines starting from the clunker and making my way up to the carb...