The blade height won't go below 4 and when I go to 3, the motor stops and I have to bang it on the ground to get it to start. I make sure the deck is clear of grass buildup. I'm afraid there is something wrong with the electrical system and when I checked with Home Depot, they said they had to send it out to RLC in Illinois somewhere and it would take a month to get it back. Not acceptable for a $500 machine. You guys are sending me a new machine, but I am a bit wary about the problems the "Community" have proffered.