[heavy chevy]

Have lpg gas range,both large cooktop burners have low flame .I"ve owned this range since new.I have tried several things to try and fix. :cleened buurner ports ,burner tops,orvices,ect.these are the only burners used ,it takes forever to boil water,small burners work fine,gas pressure is ok,wondering if gas controls are getting worn out or buners getting old ,I've checked truness of burner tops seem alright burners are slightly warped .this is a seal top burner set up ,any suggestions are welcomed THANKS

[Gene]

If you remove the knob and look into the shaft, there is a small adjustment screw on the bottom. Using a small flat screwdriver you can adjust the flame.

Gene.

[okbobcats]

also make sure that the right orifices are in the right burners. the oners with the biggest hole go to the large burners. I've seem this many times being wrong.

[heavy chevy]

i already tried this,this is a fine adjustment for simmer only,also burners used to have normal flame when new ,so it"s not wrong orifices,thanks for your suggestions,more suggestions would be much appreciatied thanks,heavy chevy