Gas Grill Burner Air Shutter Adjustment

Gas Grill Burner Air/Gas Adjustment

The right amount of oxygen to gas mixture is essential for attaining that blue flame and perfect heat in a gas grill. 

A yellow flame can be the cause of a bad air to gas ratio.

Gas grill burners will have some sort of air adjustment at the end of the burner where the burner meets the valve orifice. If you should notice that you have no flame, a yellow flame or burner blows out, you will probably need to adjust the air mixture.

Weber Gas Grill Burner Air Adjustment   AOG Grill Burner Air Adjustment

To adjust the air gas mixture :

1. You may need to remove the burner when adjusting the shutter if you cannot reach it from behind the control panel. At the base of the burner (closest to the valve) there will be some sort of air adjustment.  It can be a metal slide that you can open and close, it could be a metal air shutter that attached to the base of the burner or there can be a screw that you open or close. On burners that have metal air shutters will have a screw that holds the air shutter in place. Loosen the screw and wither slide or turn the air adjustment.  

2. Place burner in Grill and test fire to see if you get blue flames with yellow tips

3. If the setting is good, remove the burner and tighten the screw to hold the air adjustment in place

4. Adjust remaining burners to the same setting

Some burners will have a screen at the bottom. This screen does not affect the air mixture. It is there to keep insects out of the grill

You can also adjust the air shutter when the grill is on. In this method, you will be able to see the flame while making your adjustments. This is easier than the trial and error method above. You may or may not be able to use this method. It will depend if you can reach the air shutter.

1. Light the grill

2. Remove the front control panel exposing the manifold and valves

3. Loosen the screw on the air adjustment

4. Make your necessary adjustments by sliding the metal sleeve

5. Repeat on all burners

Many manufacturers use different types of air shutters on their burners. 

Here are a few examples of how to adjust the air shutter on a few leading brands : 

Weber Genesis II, Loosen the screw at the base of the burner and the air adjustment slides up and down.

Lynx Brass burner, it is at the bottom of the burner (right where the burner goes over the valve. To adjust the air mixture, turn the metal air adjustment clockwise or counter clockwise

With the AOG U burner, take a wrench to loosen the screw and turn the metal air adjustment and tighten when completed.

Some aftermarket cast iron burners do not come with the metal air adjustment at the end of the burner. In this case, you can use your original. If you should have any questions on how to adjust your air shutter, please email us at or call 877-983-0451.

by Tracy Hollander on 8th Nov 2017
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