A powerful OHV engine and aggressive counter-rotating tines gives the DR Rear Tine Tiller the extra muscle you need for sod-busting, and makes all types of soil preparation fast and easy. Power driven wheels can be released with a pin for free-wheeling when needed to travel or maneuver the tiller. Engine Warranty: 2 yrs Residential, 90 days Commercial. Machine Warranty: 2 yrs Residential, 90 days Commercial.