I have a hustler super z and today when I started mowing, the mower didn't seem as fast. I kept on mowing though. On my first yard near the end I started smelling a strange smell (hydro oil). when i finished i raised my seat and there was hydro oil everywhere. It seemed like it was coming out where you put the oil in. I didn't mow anymore yards. What do you think is the problem? I have no clue. Taking it to the dealer tomorrow.