The Murray 3666 is a lawn tractor produced from 1975 to 1980 by Murray in Lawrenceburg, Tennessee, USA. It features an 8 hp Briggs & Stratton 1-cylinder gasoline engine with electric start, a 3-speed belt-driven gear transmission with 3 forward and 1 reverse gears, and two-wheel drive with manual steering and disc brakes. The tractor has a mid PTO with an independent manual clutch. It weighs 462 lbs (209 kg) and rides on 15x6.00 front tires and 18x9.50 rear tires. Attachments include a 36" mid-mount mower deck, a 36" single-stage snowblower, and a 42" front-mount blade. The model has a similar variant known as the LT/8.