i got my new red hawk with the 18 hp kohler. it came with high lifts. i havn't cut with it yet, but i been driving it around the yard getting the feel for it. one thing that concerns me, is that when i engaged the blades, with that big engine, i expected to hear something that sounded like a helicopter. instead, it sounded "weak". i am now concerned. the dealer says this is normal because of the oversized engine and promises me it will not lack in cutting quality or power. any input? shouldn't this thing sound like a helicopter?