The Massey Ferguson ZT 1850 is a zero-turn mower built by Simplicity and distributed by Massey Ferguson from 1999 to 2003. It features an 18 hp Briggs & Stratton Vanguard 2-cylinder gasoline engine, hydrostatic transmission with infinite forward and reverse gears, and two-wheel drive with hydrostatic differential steering. The mower has a 50-inch mid-mount mower deck with 3 blades and adjustable cut height. It was built in Port Washington, Wisconsin, USA, and has an open operator station.