The Allis Chalmers 611 LTD is a lawn tractor produced from 1980 to 1985 as part of the 600 Lawn Series. It was built in Port Washington, Wisconsin, USA, and originally priced at $2,099 in 1984. The 611 LTD features an 11 hp Briggs & Stratton 399cc 1-cylinder gasoline engine, a 5-speed belt-driven gear transmission with 1 reverse gear, and two-wheel drive with manual steering and disc brakes. It has a wheelbase of 45.5 inches and weighs between 330 and 526 pounds depending on attachments. Attachments include a 36-inch mid-mount mower deck, snowblower, and blade. The tractor has a 12-volt electrical system with negative ground.