This past weekend I decided to smoke a pork butt to make pulled pork. Prepared everything according to plan and started it off on my Masterbuilt Dual Fuel, using the propane burner with hickory and apple chunks for the smoke. After running flawlessly for about 2 hours, the flame on the burner went out, almost like the tank ran dry of LPG. I tried to relight it, and cranked up the regulator a little and the flame was like a torch for a few seconds then out again! The LPG tank is not empty, could this be caused by the burner or Venturi tube clogged up? FYI, my smoker had this issue about a month ago when I was going to do a tri tip. By the way, I quickly switched to Plan B and put the butt on my gas grill (set up for indirect heat) and got my AMPTS quickly lit with some hickory pellets. Things worked out well, might have to just junk the Masterbuilt. Here's some QView: Rubbed and ready to go. About 5 hours on the grill. All done, it was delicious.