Evening, My Redmax backpack blower is bogging out a lot. My dealer is telling me that the enclosed trailer is causing heat pressure to build in the gas tank. I am turning the cap before each use and I still have to choke on every stop I make. A new carb was put in under warranty. Shall I still receive the unpleasant smoke up my A## or can any of you give me your experience with this or an opinion on a different blower unit.