Added to that, the unit is available in a special edition model (X728SE) with a larger heat and a batch of aesthetic improvements like shiny wheels and a sporty fender bender. Like its predecessor, the John Deere X728 is based on a 27-hp V-twin, liquid-cooled John Deere iTorque Power System designed for lugging up to 168 of material waste like leaves, mulch and discharge. Plus its Edge Xtra™ Cutting System allows a user to quickly convert the unit for other tasks like side discharging, mulching, and material collection.