Stilh hs80's While Matt was cutting hedges today, the blades stopped cutting. The engine would rev, and every now and then the blades would give a little slide then stop. He had to tear down the whole machine completely to find out the problem. On the bottom of the motor there is a clutch bell that slides over the clutch shoes, and it also has the main gear that drives the blades... that part sheared in half where the pinion connects to the bell. The dealer said he never saw this before. Anyone else ever had this happen?