Originally Posted By: jzmtl
Regard your comment on how the burner is lower on the micro, I'm wondering if that's the possible cause of CO, would it be possible to unscrew the stem from a PR, cut some off, retap the thread and drill the air hole, and achieve the same thing? Would make the burner lower and easier to shield from wind too.

I don't know enough about adjusting the air/fuel and lack the equipment to drill it, so I can't try it.
You could do it, and it might or might not work. But why go through that when the professionals who have state-of-the art carbon dioxide monitors have done it for you?

Messing around with flammable gas burners isn't necessarily the best thing unless you really know what you're doing.

HJ
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Adventures In Stoving