OBG..
    change jets??..the old MSR seemed to run on gas and kero
   without changing anything..it came with another jet but i
    thought that was a spare...i'll have to dig out the instruction sheet thats around "somewhere"..jet change on the
    whisperlite???..it looks like the problem there was that
    i was sold the wrong model...    

     this is the GK on kero..no jet changeing..the yellow
     flame got more blue as the stove ran and heated up..