helped a little, not blowing out but I turned up the gas. It appears the flame is not hot enough. The metal does not get orange very fast or consistent. When it get hot I hit the O's and it just dies. I did find a small leak in the O2 line near the cylinder. Could it also be the wrong tip, I think it is a 2, several #'s the a -2 ? I was able to cut some 3/8" but on 1/2 " it's a no go.
I am starting from an edge
Yes. I started at 35/10, went to 40/12. I don't know if it's a problem but I am outdoors and there is a breeze. I borrowed this torch so I don't even know when the head was last cleaned. O2 hose is repaired. Don't know what else to tell you. I am cutting apart an old CAT 955 for scrap. There will need to be cuts of steel or cast up to 1 1/2 " possibly. I was able to cut some tubular pieces with little difficulty. Watched several youtube vids and it just appears the metal is not getting hot enough. Last I did this was 45 years ago in high school.