The Troy-Bilt 5118HR GT1800 is a garden tractor from the 1989 DuraTrac Series, built in Port Washington, Wisconsin, USA. It features an 18 hp Kohler M18QS 691cc 2-cylinder air-cooled gasoline engine with electric start. The tractor uses an Eaton 11 shaft-driven hydrostatic transmission with infinite forward and reverse gears. It has front and rear lawn/turf tires sized 16x6.50-8 and 23x10.50-12 respectively, and is equipped with a front independent PTO with electric clutch. The tractor is two-wheel drive with an open operator station and a 12-volt electrical system with negative ground.