The Woods F21D is a front-mount mower lawn tractor produced from 2001 to 2006 by Ariens for Woods. It features a 21 hp Kubota D722 719cc 3-cylinder liquid-cooled diesel engine, hydrostatic transmission with infinite forward and reverse gears, and two-wheel drive with power steering. The tractor has an open operator station and uses a 12-volt electric starter. It has a wheelbase of 51 inches, length of 77 inches, width of 50 inches, height of 49.6 inches, and weighs 1000 lbs. The front tires are sized 23x10.5-12. Attachments include 54", 61", and 72" front-mount mower decks with 3 blades and right discharge. The F21D was succeeded by the FZ21D model in 2007.