I just got a new Husqvarna 150BT and it seems to run pretty well, starts easily and has decent power. I have run 1 tank of gas through it, so it is not broken in yet. I noticed it has a fair amount of vibration at idle up to about 1/16 throttle, which then smooths out at higher throttle positions. The engine runs smooth with no misses. At idle shakes on the rubber mounts maybe an 1/8' or slightly more and I can feel this through the back pad. Is this normal for this blower?

Here is a link that might be useful: Husqvarna 150BT Vib