The AMF 3504 is a lawn tractor produced by AMF from 1974 to 1975 in Des Moines, Iowa, USA. It features a 1-cylinder, air-cooled vertical-shaft Briggs & Stratton gasoline engine producing 8 hp (6.0 kW) gross power. The tractor has a 3-speed belt-driven gear transmission with 3 forward and 1 reverse gears. It is a two-wheel drive with manual steering and an open operator station. The AMF 3504 includes a mid PTO with an independent pulley type clutch. It weighs 353 lbs (160 kg) and has front tires sized 13x5.00 and rear tires 16x6.50. Electrical system is 12 volts with negative ground. Attachments include an 81 cm mid-mount mower deck and a 32-inch mid-mount mower deck with 2 blades and manual lift.