The John Deere 57 is a riding lawn mower produced from 1971 to 1974. It features a 7 hp Tecumseh V70 gasoline engine with a 245 cc displacement and air-cooled vertical-shaft design. The mower offers two transmission options: a 2-speed gear transmission used from 1971 to 1972 and a 3-speed gear transmission introduced in 1973. It has two-wheel drive with chain final drives and manual steering. The mower includes a mid PTO with an independent mechanical clutch. Weighing 326 lbs, it rides on 11x4.00-5 front tires and 16x6.50-8 rear tires. Attachments include a 34-inch mid-mount mower deck and a 38-inch front-mount blade, both manually operated. Electrical system is 12 volts with negative ground. Serial numbers are located on the rear right side behind the tire.