Heater will run for about 5 min. Than flame goes...

Question

Clean kero / Clean nozzle when I took it appart, Clean tubig filter,When you take the cover off and run it ,the flame come out the front as long as you have the cover off 1 min or 30 . Putt the cuver back on and 5 to 10 min later , it's puffing smoke (unburnt fuel )