I had a toro commericial with a honda engine, I cut 3 yards with it and had to fight the dealer to take it back. It leaked gas on hilly yards, I was told it had to do with the design and it would continue to do this. I would stay away from the honda engine if you're going to use on anything hilly. I waited over a year and now have 2 exmarks with the kawi engine, no complaints. I also have the kawi engine on a deere but I like the exmarks much better.