I recently purchased a 2004 grasshopper 727k and the mower is awesome. The only thing I hane noticed so far is after mowing for a while, if you disengage the pto it has a real hard time starting back up(re engaging). If you let it try to do its thing it will smoke slightly.....not anything to major but I didnt let it do that for more than a sec. You can see the clutch try to engage so i know its not the switch. It seems to me that when it gets warm things expand with the heat because if you let it sit it engages just fine. Any body with any help would be much appreciated!!