Answer Bob, you'll need to purchase the LP orifices. You'll need two of part number WB28K145 for the medium burners, one of part number WB28K144 for the small burner, and one of part number WB28K146 for the large burner. Flip the regulator to LP and adjust the oven orifice. Thanks! Read More... Answered by AppliancePartsPros.com | Wednesday, April 22, 2015