Honda 2113 Harmony

Hullo all, This is my first post. Last month I acquired a Honda Harmony 2113 Ride On. We are on 7 acres with about 1 acre of mowable scrubby grass (not lawn). I have always used a push mower and now, I can get the job done in double quick time. However, the Honda doesn't seem to cut as well as I would like. I have it set to the highest level and even in long grass, the cut seems to be average to say the least. I don't expect it to be bowling green smooth but if it could approach the quality of a push mower job, that would be nice. Living in Australia, our grass is very tough and tropical so am I expecting too much?

Any thoughts would be greatly appreciated.

Chris Evans