- Try going a little slower so the deck won't bounce as much. - Keep the deck set to where it cuts at least 3" high. I found out this also helps the grass smother out weeds & allows the grass to weather dry spells better.
Barring some kind of serious mechanical failure like a broken spindle housing or cracked deck, uneven cut means.... Tire pressure is uneven, bent blades, deck is out of adjustment or has something missing/broken in the hangers. With a ZTR it is also possible that one side of the machine drops into a hole or dip of some kind and the opposite side lifts. If the uneven cut is only for a short distance, this is likely the case. You can try to remedy this by setting the gauge wheels as low as possible without them actually supporting the weight of the deck.
Mine does this with speed as well. The Dixie cuts around 17 mph + IIRC. I slowed mine down A LOT. Otherwise I get a real choppy finish. I'd be surprised if I do 9-10 mph when cutting and slower in bad spots.
If your front tires have too much air they will bounce and cause this. Drop your air pressure and raise the deck a little to compensate.
with my hills, I figure the solution is a narrower deck, to late for that. if yours is flat and bumpy I don't know.
also try different patterns, I mow north-south, east-west, diagonal left, diagonal right then repeat. I like diagonal right best, wife likes east-west best, go figure.
Gotcha. Thanks guys. I kind of figured it was the bumpy lawn issue. Was not as apparent with the 48" walk behind. I will try going with lower tire pressure and raising the height a bit. ironpony it is more evident with some patterns for sure.
