Mowing the lawn. Well, it rained a lot this summer in the Cincinnati area and I got behind on mowing. So, I fired my old mid-80's vintage Simplicity 4211 and went to work. This area was particulary high and stubborn. Simplicity 4211 hydraulic drive - one heck of a mower. I did replace the motor a couple of years ago. Now it's about 13 HP.