Front wheels on manual mower lock when pushing for awhile.

1 Locate the height adjustment lever on the inside of the left rear wheel.
2 Kneel next to the mower and push the left height adjustment lever toward the center of the mower. This will unlock the lever from the locking pin on which the height is currently set.
Read more: How do I Adjust the Height on a Great States Reel Mower? ' eHow.com http://www.ehow.com/how_6834215_do-great-states-reel-mower_.html#ixzz21NOr1e8d

3Rotate the lever toward the front of the mower to lower the height of cut, or toward the rear of the mower to raise the height of cut.

4 Release the lever over the locking pin closest to the desired height of cut.

5 Repeat these steps with the adjustment lever on the right-side rear wheel. Be sure to set the right wheel lever to the same position as the left-side wheel's lever for an even cut.