Gravely ZT X 48 - 21.5hp Kawasaki FR651V, w/48" Fabricated X-Factor Deck, (918009)Description: This is the residential lawnmower thats often mistaken for a commercial mowing machine. Its no surprise with its heavy duty construction, professional features, and legendary Gravely performance. When you have a ZT X on your lawn, your neighborhood will know youre upping your lawn game to the next level. Specification: Model Number: 918009 Power Train Engine: Kawasaki FR651V Horsepower: 21. 5 HP Engine Displacement: 44. 3 in 726 cc Fuel