As mentioned before in a early post--------
Clean out the gas (PROPANE) tube, a spider or bug or trash has gotten into the gas tube, causes uneven ignition. You can simply remove the tube or use a air hose to blow the tube out. It is the tube that has the gas jet at the beginning of the tapered tube. If you remove it, make a mark exactly where it is set or bolted to the unit. This should be the correct air mixture adjustment.
Sid, Lois & HRH MISSY Terrible 2s SHIH TZU
2011 ROCKWOOD 8285 WS
2014 F-250 KING RANCH PS/SD/6R140/BFT
BOLIY PRO 3600SI GEN
DAYS CAMPED 2016 57 DAYS