Brass Seal

The front burner had a noticible flame coming from the base, so I originally purchased a single burner to replace it (you could see a corroded hole at the bottom). Upon taking the unit apart, I noticed the corrosion was much worse than met the eye. Given the age of the unit and that some parts were already becoming discontinued I decided to gut the whole thing and replace it all.
The burner unit slides out easily and after unscrewing the sides, you have to disconnect the wires from the underside of the igniters. The venturi tubes and igniters then unscrew from the underside of the burners which twist right out of the assembly. Re-Assembly is very intuitive looking at it and it all goes right back together as it came out. Took 45 minutes total and that includes fighting with some screws that had rusted onto the burner.
Reading some of the previous reviews, current prices are double to triple what other people did the repair for leading me to believe parts won't be available for much longer. Make the repair while you still can!