[hemijimbo]

I bought a new j/d lawn mower last year it has worked well, until lately, it doesn't cut uniformly, there are high "lines" down the length of the cut, I mean real noticeable! I tried removing and sharpening the blades, didn't change anything, also I have cleaned all stuck grass from inside the blade area, any ideas why this doesn't cut flat? Thanks for any help/tips...

[Redflash]

Very sinple... your deck needs to be leveled. Read the manual for instructions on how to do this...

[ballengerb1]

You should also check you tire pressure in all four tires, raers are the most important. 10psi is a common recommendation but check the tire sidewall. A big tire with 5 psi looks very similar to a 10 psi but really screws up the cutting. This will show most when cutting on a hill parallel to the slope.