Nice find. That is a useful size.
I agree.
The 1” burner would work well for running vertical engines.
I agree.
The 1” burner would work well for running vertical engines.
The original round one I bought years ago was too tall to fit through most vertical firebox openings.
My burner is “out for delivery”

Will finally be able to run some 100 year old verticals that I wanted to test on a small flame