My guess would be a spider’s web in the vent adjacent to the control knob.

Jim. 

> On Sep 23, 2020, at 9:04 PM, Douglas Toomey <drt@UOREGON.EDU> wrote:
> 
> We have a problem with one of the stove top burners in a 1991 westy.  The left burner works as expected, nice steady flame at all settings.  The right burner, however, burns unevenly, with a bit of a sputter, and when the flame is adjusted it poofs out.  The flame itself is blue, not yellow or discolored. 
> 
> Before taking apart the stove top I thought I would ask if anyone has had this issue.
> 
> Thanks!
> 
> Doug