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Peter: Robert offered some solid suggestions. Although not a professional or an expert I've had the opportunity to work on several mower decks over the years. I'm not specifically familiar with the Wheel Horse decks but I've found several general things that can cause uneven cutting. Be sure all of the tires on the mower are properly inflated. A low tire can cause a mower to lean and drop the blade(s) on that side. A clue is if the uneveness is worse when turning into the low tire. (Found that one when the tire rolled off one wheel.) Check that all of the deck mounts, wheels and anti-scalp rollers are set on the same level. See Robert's suggestion about checking on a level surface. Check that the blades are level or parellel with the deck. If the deck is flat, measure from the bottom of the deck to the tip of the blade at several places. In most cases the distances should be equal. If multiple blades, they should all be the same. (An exception is some mowers are built with a little "cast" to the blades. The tip is about 1/8 in. lower when pointed straight forward compared to straight back. If this is the case all blades should be equal.) If they aren't equal there are several potential causes.
The blade may be bent. Check it against a known good blade. You may have missed a shim or washer under a spindle mount when you reinstalled it. You may have a bent spindle. Spin the spindle and watch for any eccentric movement. The deck may be bent. Check across the spindle mount with a straight edge to see if it is flat. On one machine one of the boys hit something so hard that he bent the deck under the spindle mount causing the blade to run uneven and it took me a long time to discover the cause. I'm sure this is not all of the potential causes but I hope it is some help. Good luck in getting your cut even again. RussA
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