Howard Andrews of Rumson, New Jersey sent us a copy of an instruction book and spare parts list he recently purchased from a bookshop in York, Pennsylvania. This illustration shows a Howard Rotavator “GEM” garden tractor, series III model. Publisher of the parts list was Rotary Hoes Limited of Horndon, Essex, England. Here are the specifications of the machine:
Engine: Single cylinder side valve (600 cc.) J.A.P. Mk.III.
Bore And Stroke: 3-3/8-inch diameter x 4 inches (85.7 mm. x 104 mm.)
Engine Speed: 1,800 rpm
Fuel Tank: Fuel and oil tank built as one unit with separate compartments. Fuel capacity 1-1/2 gallons. Oil capacity three pints.
Clutch: Heavy-duty single dry plate.
Gear-box: Three speed and reverse transmission by hardened gears running in oil. All shafts mounted on ball bearings. Differential gear for easy turning automatically locked when rotor is engaged.
Speeds: 1st gear — 0.78 mph; 2nd gear — 1.17 mph; 3rd gear — 1.65 mph; Reverse gear — 1.40 mph
Rotor: Speed 155 rpm 18-inch diameter.
Power Take-off Pulley: 10-inch diameter 4-inch face; 450 rpm; 1,178 feet per minute
Overall Dimensions Of Machine: Length 6-foot 6 inches; Width 2-foot 1-inch *
Weight: 5-1/4 cwt. approximately*
*Standard 20-inch Machine.