ORIGINAL: Cryhavoc
I've always read that you wern't supposed to break a gas engine in on a test stand. Test stands were just for testing and sorting out problems. I understand about airflow but if that was the case, why wouldn't my weedeater burn up? Hummmm.....
Bingo. Ask Dick Hanson how many engines he has bench ran (more than I will ever own, I'm sure) and how many he burned up. And that is a lot of exhaust and pipe testing, where the possibility of screwing things up is much greater.
Mark