I have a Homelite 20 PowerStroke with a 16" bar. I drilled holes in the muffler and it seems like it helped a lot. It always starts and runs good. I also have a Stihl 028 and a Dolmar 5100. Most of what I cut is from 15" on down to 1 or 2 inchs. I think I enjoy using the Homlite more than the other two.