Stihl TS 500I Cut-Off Machine 72.2 cc Engine, 14" WheelSTIHL TS 500I Cut Off Machine 72. 2 cc Engine, 14" Wheel STIHL offers another industry first with the TS 500i STIHL Cutquik cut off machine. Featuring the handheld outdoor power equipment industrys first electronically controlled fuel injection system, the TS 500i increases power by 17% and cutting speed by 15%, as compared to the STIHL TS 420. Powerful, lightweight and well balanced, the STIHL TS 500i is designed for superior handling during the