The Gilson 53015 S-16 is a garden tractor produced from 1973 to 1974 as part of the S Series. It features a 16 hp Briggs & Stratton 531cc 1-cylinder gasoline engine with an air-cooled horizontal shaft. The tractor uses a Vickers T66 shaft-driven hydrostatic transmission with infinite forward and reverse gears. It has two-wheel drive, manual steering, and an open operator station. The tractor weighs 746 lbs (338 kg) and rides on 6x6.50-8 front and 8.5x12 rear lawn/turf tires. It includes a front independent PTO with a manual clutch. Attachments available include 42" and 48" mid-mount mower decks, a 48" blade, and a 36" snow blower. Variants include models with turf or ag tires.