The Yard Machines 15.5 is a lawn tractor manufactured by Yard Machines, a part of MTD. It features a 15.5 hp Briggs & Stratton gasoline engine with a 1.5 gallon (5.7 L) fuel tank. The tractor has a 6-speed transmission with 6 forward gears and two-wheel drive. It includes a manual steering system and an open operator station. The power take-off (PTO) is a mid PTO controlled manually. Tires are sized 15 X 6 in the front and 20 X 18 in the rear. Attachments include a 38 inch (96 cm) mid-mount mower deck. Electrical system uses a 12 volt battery with negative ground.