The Yanmar YM173 is a compact utility tractor produced from 1969 to 1974 by Yanmar. It features a 0.8L 1-cylinder liquid-cooled diesel engine producing 12.8 hp (9.5 kW) at 2100 RPM. The tractor has a 6-speed gear transmission with 6 forward and 2 reverse gears, two-wheel drive, and manual steering. It has an open operator station and a rear PTO with 540 rpm. Dimensions include a 49.2 inch (124 cm) wheelbase, 82.3 inch (209 cm) length, 36.6 inch (92 cm) width, and 65.4 inch (166 cm) height. The tractor weighs 1345 lbs (610 kg) and rides on 4.00-10 front and 7-16 rear tires. Electrical system is 12 volts with a 70 AH battery and negative ground.