I've done the conversion before with no problems. (LP to NG)
Recently I bought a grill that suited me perfectly. I'll include a photo of it. It had an all-aluminum body, thermometer, two burners, (I want indirect cooking for slow cook and the addition of some smoke wood.) The jets were removable, it was lightweight and was a table top style with flame reflectors and a one piece solid cast iron grill. Just what I wanted for my safe outdoor patio that is stucco walled and ceramic tile floor with no obstructions to fresh air, a ceramic topped table; also a water hose is right there.
I read the size on the jets and used a few internet charts to determine what size I needed. I had a drill on hand that was very close, so I drilled them.
The flames were beautiful, blue, with layers in them. The valves when turned to minimum wouldn't stay lit, so I established my new minimum setting. I was suspicious, but there were no yellow in the flames at any setting.
The problem was that they were so hot that I could never close the top or get a moderate heat. On the lowest setting with the lid closed the thermometer woulds soar to about 400ºF. I crossed checked the heat reading with another thermometer of known accuracy.
Where do you fellows think I may have gone wrong? Thank you for your replies so far and for the ones yet to come.
Gary
Features:
13,500 total BTU (2 x 6,750 BTU each burner)
262 Square Inches Total Grilling Area
Reliable Push-and-Turn Ignition
Heavy Duty Cast Aluminum Lid and Firebox
Uses Propane Gas. Tank Not Included