deereman64,
I use a Toro WH 520xi with a 60" deck to cut my 3 arces with. I always cut my grass at 4" with my mower deck. I always mow my grass about every 5th day, weather permitting. I never have had any problems with excess grass clippings per say, except maybe in the spring when the grass is thicker and moist. Sometimes when I have excess grass clippings I raise the mower deck all the way up with the deck blades engaged. I then mow over the excess grass clippings and the mower kind of fans/thins the excess grass clippings outward.
Are your blades sharp? I sharpen mine every 25 hours. What kind of blades do you have on your mower deck? Maybe you need a set of high lift or gator blades. In what direction do you mow? I mow north to south one week, then east to west the next week. This will help you spread out your old excess grass clippings. When mowing, do you discharge your grass clippings inward or outward from the uncut grass? I always discharge my grass clippings outward. Is your mower deck set up right? Does it cut/mow level? The front of your deck should be about a 1/8"-1/4" lower then the rear of the mower deck. If all of the above items check out OK, then I guess a lawn sweeper is in oder. I hope this info will help you out.
arthurb,