Product Summary. Nearly 5" Diameter Capacity! Chip branches up to 4.75" in diameter. High discharge with extended chute option. 11.5 HP (16.5 ft-lbs gross torque*) Briggs & Stratton OHV engine. Manual- and Electric-Start options. DR Self-Feeding Wood Chipper. DR Self-Feeding Wood Chipper. PRO XL575.