I have a John Deere D110 42" mower and it cuts even except when I make sharp turns, sometimes not even a sharp turn. It has done this from day one, so is this the nature of this model, being a Homedeopt model?
Mick

Take a look at the deck and make sure its not adjusted so in a tight turn the deck isn't shifting enough to hit a back wheel.

Try slowing down on turns also. Centrifugal force can cause lift on the inside of the radius similar to driving your automobile too fast on a sharp road curve.

Hi,
I would also encourage you to check tire pressure. 10 psi in rear and 14 psi in front.
Peace,
Clarke