I was talking with my brother today and his friend has a church yard that I may be able to pick up, however the yard has a long and steep bank. I actually mowed this lawn the other day and just went up the bank vertically and back down it and then go back up it and it did fine. My brothers friend who does maintain the lawn said to my brother that when going up a hill like that will ruin the hydro's. I didn't know how to take that comment because I had never heard of that. The mower does bog a little going up the hill but nothing major. It was mainly due to the height of the grass on the hill and the degree of the slope. Maybe he is trying to scare me off from trying to bid on it so he can keep it! Note that he has a residential Simplicity ZTR cutting commercially. So do you guys think that going up and down this hill will ruin my hydro pumps/motor?