Almost missed your questions with the page change, Sprk. Cutting about 20 acres, some is lawn-like, other parts are more rough. Takes about 16 hours if dry, longer if conditions are less ideal. I have to cut short or I would have to start over as soon as I finish. The mower has to wade through crayfish hole chimneys, fire ant mounds and patches of clover and the 35 hp does. The Scag dealer maintains; all I do is change blades, fuel up and go. Don't know if fuel injected.