My Stihl BP blower started to lose some power lately. When I got back home today, I thought I would try to figure out what was happening. To make a long story short, I found the spark arrestor to be all carboned up. After removing it, I started the unit back up. WOW what a difference! I am so impressed at the amount of volume I am getting now, that I am pretty sure it is better than new. My question is this.... I can't see where it would hurt if I just left it out, but could there be any damage if the unit is operated without the spark arrestor?