The Gilson 53009 S-15 is a 1972 garden tractor from the S Series by Gilson. It features a 15 hp Briggs & Stratton 531cc 1-cylinder gasoline engine with electric start. The transmission is a 4-speed belt-driven gear with 4 forward and 1 reverse gears. It has two-wheel drive and manual steering with an open operator station. Tires are sized 6x6.50-8 front and 8.5x12 rear. Attachments include 42" and 48" mid-mount mower decks, a 36" snowblower, and a 42" blade, all front or mid-mount. Electrical system is 12 volts with negative ground.