How to remove and replace burners on model 3673G-regal

Be sure the gas is turned off before preceding:

Remove the cooking grates and set off the side, out of the way.
Remove the Flame Tamer cover plates.

Looking toward to the rear of the inside of the burner compartment, you will see that the cast stainless steel burners are resting in place on top of a bracket or ledge. There is a tip on the bottom of each burner that goes into this bracket. There is a cotter pin or lynch pin that holds each burner in place. Remove the pin(s) and carefully lift the burner up and toward the rear of the grill. This will allow the burner to slide off the burner orifice and out of the grill. Before installing the new burner(s) compare the old one to the new one and match the air intake valve's opening to the new one. Most burners come preset. But, it's best to make sure. When you look at the burner where it fits over the burner orifice, you will see how to adjust it if necessary.

Now, just install the new burner(s) in reverse of the way you took the old one(s) out. It is not necessary to reinstall the cotter pin(s) or lynch pins (unless you want to), as they are on there to hold the burners in place during shipping.

Take your time and you'll do fine.

Hope this helped you. Happy Grilling!