A dull chain is the most common cause of chainsaw vibration.

Yes. Excessive vibration almost always means your chain is dull or the tension is wrong.

A sharp chain cuts smoothly—it slides through wood. A dull chain has to be forced, which makes the saw grab and buck, shaking your arms and the whole saw. Check the chain first: if the cutters are round instead of square, or if you’re getting fine dust instead of chips, sharpen or replace it.

Tension matters too. Too loose and the chain slaps; too tight and it binds. Both create vibration. Also inspect the sprocket tip and the bar groove for wear. If the sprocket is hooked or the groove is pinched, the chain won’t run true.

One more thing: old gas or wrong fuel mix can make the engine run rough, which feels like vibration. Drain and refill with fresh mix if it’s been sitting.

Keep the chain sharp and tensioned. That fixes nine out of ten vibration problems.