The Simplicity SunRunner 12G is a lawn tractor produced from 1987 to 1989 as part of the SunRunner Series. It features a 12 hp Briggs & Stratton 1-cylinder air-cooled vertical-shaft gasoline engine with electric start. The transmission is a Peerless 5-speed belt-driven gear type with 5 forward and 1 reverse gear. It has two-wheel drive, manual steering, mechanical band brakes, and an open operator station. The tractor uses a front independent PTO with a mechanical idler pulley clutch. Dimensions include a 40 inch wheelbase, 64 inch tractor length (83.75 inches total), 36 inch width, and weighs 490 lbs. Tires are lawn/turf type with 15x6-6.00 front and 4.1/3.5-4 rear sizes. Electrical system is 12 volts with negative ground. Attachments include 36" and 42" front-mount mower decks with multiple cut height adjustments. Variants include the 12G gear model and 12H hydrostatic model.