Actually, I put a 36" B&C on it. Naw just kidding. It had only a 14" bar on it. But you start with the saw at the top and cut until the bar tip is a little buried and is vertical. Then you go horizontal with the bar and follow it down the kerf.Wtf! Can an Ms170 even pull a 24" chain?! That must have been slow going. I bought 71cc of husky to use a longer bar than the 14" on my ms180