When you are sitting on the mower there is a lever on the right side of you on the fender. That is your deck height lever, you should be able to move the lever out of one off the slots to change the deck height. Try moving the lever out of the slot that its in now and move it forward one spot and see if that is good for you. The deck should now be about 1/2" lower now. If you can not move the lever then something is wrong with you mower.