What are the 7 height adjustments on the 21-inch Mower? 7-Position Height Adjustment (From front to rear): 1.2 in. (30 mm) 1.6 in. (40 mm) 2.0 in. (50 mm) 2.4 in. (60 mm) 2.8 in. (70 mm) 3.1 in. (80 mm) 3.5 in. (90 mm) Related articles How do I know when the grass bag is full? How do I adjust the cutting height on my Sun Joe Mow Joe MJ401C-XR Lawn Mower? How do I adjust the cutting height on my Sun Joe Mow Joe MJ408E Lawn Mower? The battery is charged but the unit isn't turning on. Why is my SPX-FC34 not dispensing detergent?