I just bought a 2007 John Deere 727A about a month ago. Today I was cutting grass and all of a sudden the blades just quit. So I pushed the PTO knob down(disengage) and then I pulled it up to engage the blades and it just sounded like it was going to start but it didn't. Kind of hard to explain. I only have 7 hours on the mower. I called the dealer and he said he thought it sounded like the clutch (PTO clutch I guess). Have any of you JD owners ever experienced this problem before? I would think it would be covered under warranty correct? The dealer said that the factory may not have put the clutch on right or something. Anybody have any ideas?