I just purchased a used (183 hrs) Kubota zd21 with a 60" stamped (old style, right?) deck. I used it today for the first time and am very disatisfied with how it discharges the cut grass. It hardly had enough power to get the grass out from under the deck and left piles everywhere. I was mowing about 4-4 1/2" grass to 2 1/2". I know that is more than I should cut at one time, but also know that this mower should be able to handle that. I also tried to blow the cut grass off of the driveway with the discharge of the deck, and that wouldn't ever move the cut grass. That just doesn't seem right to me. I mowed some of the lawn at a 3" height and didn't have the piling, but it didn't blow the grass out much beyond the deck end either. Any suggestions before I take it back to the dealer?