We also loaned the 1.5 KW unit to the guy across the street from me, and he ran it for about 24 hrs total. This unit is really beat, and it started to miss-fire and act funny. Finally took it apart, and the carb float was sticking and one plug not firing right. Replaced plug lead with one from the 3 KW conversion take-offs and it runs great again. Would run about 5 hours on the little plastic tank. Also noticed that the gov. bellows moves violently while running like it has too much crankcase pressure. Anyone notice this with theirs?