The Keck-Gonnerman 25-50 is a standard-tread farm tractor produced from 1928 to 1937 by Keck-Gonnerman in Mount Vernon, Indiana, USA. It features a LeRoi 9.9L 4-cylinder liquid-cooled kerosene engine with a hand-crank starter and optional electric start. The tractor has a 2-speed gear transmission with 2 forward and 1 reverse gears. It delivers 25 hp at the drawbar and 50 hp at the belt, capable of pulling 4 14-inch plows. The tractor is two-wheel drive with spur gear final drives and manual steering, and it has an open operator station. Dimensions include a length of 162 inches, width of 86 inches, height of 69 inches, and a weight of 9800 lbs. It rides on 56x14 steel rear tires and has a belt pulley 15.5 inches in diameter and 9.5 inches wide, running at 666 RPM and a speed of 2677 ft/min.