hey guys, i need help with my mower. i have a 48 inch lesco hydro walkbehind with a 17 horse kawasaki motor. I have put new belts and blades on the mower this year and still can't get the quality of cut that i think i should. the mower seems to push the grass over more than it does cutting it, especially in thicker grass. there are two sets of holes on the deck and the mower is set up in the top holes. should i put it in the lower holes? any more ideas on help with my quality of cut would be appreciated. thanks!!!!!