The Wheel Horse 512D is a 1986 garden tractor built by Wheel Horse in South Bend, Indiana, USA. It features a 8.5 hp (6.3 kW) Robin DY41D 1-cylinder air-cooled diesel engine with 412 cc displacement. The tractor uses a Wheel Horse Uni-Drive belt-driven transmission with 6 forward and 2 reverse gears. It has two-wheel drive and manual steering with an open operator station. Attachments include a 106 cm (42 inch) mid-mount mower deck with 3 blades and manual lift. Electrical system is 12 volts with negative ground.