I recently purchased a Wright Sentar and the first job I used it on,yesterday, was around 3 acres.It's been EXTREMELY dry around here lately and none of this property has irrigation.Also,the grass is relatively sparse with alot of leaves,pinestraw and twigs mixed in. The amount of dust was unbelievable.I had to stop 4 or 5 times and blow off the mower and by the time I got finished it sounded very,very sluggish. Is this normal?I can put on a mask and goggles and deal with the dust on me, but the mower is what I'm worried about.I realize it's dry and dusty but it bothers me that I would have this much trouble after one job. Two questions: 1.)After getting used to this kind of mower(ZTR) should I be able to operate it without kicking up so much dust? 2.)If I replace the air filter should that take care of the sluggishness? Thanks.