My Weber Genesis Gold has a side burner that's been used maybe like three times in the last 10 or so years I've owned the grill. I recently fired it up and it's got a tall, yellow flame. That tells me not enough O2, but I took off the plastic air filter (?) and the shutters are wide open, no change, so what's more to do? Is this just the way the flame is and always has been - I honestly don't remember - or are there parts that I should be replacing?

Overall I don't love the grill and never have, but considering it's still in great shape after many years of moderate usage I wouldn't object to spending some effort or a few bucks to optimize the burner. Suggestions?

TIA!