The Gravely GEM 12.5 is a lawn tractor produced from 1991 to 1992 as part of the Gravely Estate Mower Series. It features a 12.5 hp Kohler 1-cylinder air-cooled gasoline engine with a 4.5 gallon fuel tank. The tractor uses a hydrostatic transmission and two-wheel drive with manual steering. It has an open operator station and mid PTO with an independent electric clutch and pulley type. The GEM 12.5 has a wheelbase of 48 inches, weighs 610 lbs, and rides on 16x6.50-8 front tires and 23x8.50-12 rear tires. Attachments include 40" and 50" mid-mount mower decks, snowblower, and blade. Electrical system features a 12 volt battery with 15 amp charging and negative ground.