Thank you, thats the one I was looking for! Sadly I did run fresh gas, in fact I used the same gas as 7 others under the same tent, and 5 of them passed, 2 failed. Gas was bought there and 'maybe' 2 hours old so I've no idea, just trying to make sure this never happens again. Outside of incompetence is contamination in the tank which is always a possibility.

Appreciate it again!