The Gilson 771 S-12 is a 1970 garden tractor from the S Series by Gilson. It features a 12 hp Briggs & Stratton 494cc 1-cylinder gasoline engine with electric start, a Tecumseh 2312 shaft-driven variator transmission with 4 forward and 1 reverse gears, and two-wheel drive with manual steering. The tractor has an open operator station and weighs 725 lbs (328 kg). It rides on 6x6.50-8 front and 9.50-12 rear lawn/turf tires. Available attachments include 42" and 48" mid-mount mower decks, a 36" snowblower, and a 42" blade, all front or mid-mount with manual lift for mower decks. Electrical system is 12 volts with negative ground.