John Deere D120 Engine Specifications
Engine Model – Briggs Stratton 33
Displacement – 540 cc (33 cu in.)
Cylinder – Cast Iron Sleeve
Bore – 94.02 mm (3.70 in.)
Stroke – 77.78 mm (3.06 in.)
Number of Cylinders – V-Twin
Length – 379 mm
Height – 725 mm
Ignition Module (Armature) Air Gap – 0.253 – 0.356 mm (0.010 – 0.014
in.)
Intake Valve Clearance – 0.076 – 0.127 mm (0.003 – 0.005 in.)
Exhaust Valve Clearance – 0.13 – 0.18 mm (0.005 – 0.007 in.)
Spark Plug-Gap – 0.76 mm (0.030 in.)
Spark Plug-Torque – 20 Nm (15 lb-ft)
Cylinders – Single
Oil Filter – Yes
Air Filter – Cartridge
Crankcase Capacity, with Oil Filter – 1.4 L (1.5 qt)
Oil Capacity – 2.3 L
JD D120 Drive Train
Transmission – Hydrostatic
Transaxle Model – Tuff Torq T40
Travel Speed – Forward 0 – 8.9 km/h (0 – 5.5 mph)
Travel Speed – Reverse 0 – 5.2 km/h (0 – 3.2 mph)
Chassis – 4×2 2WD
Steering – manual
Brakes – mechanical shoe on transaxle
Mid PTO – manual independent
Electrical System
Charging System – Regulated Circuit
Charging System Capacity – 9 Amp
Battery Voltage – 12 Volts
Battery Type – BCI Group U1
John Deere D120 Dimensions
Height – 113 cm (44.5 in.)
Length (Overall) – 175 cm (68.75 in.)
Width (Mower Deck Chute Down) – 131 cm (51.75 in.)
Weight – 204 kg (450 lb)
JD D120 Tires
Size (Front) 15 x 6.00 – 6
Size (Rear) 20 x 8.0 – 8
Tire Pressure (Front) 97 kPa (14 psi)
Tire Pressure (Rear) 69 kPa (10 psi)
John Deere D120 Mower Deck
Mower Deck – 107 cm (42 in.)
Blades Rotary – 2
Blade Nut Torque (w/ 5/8 in. Nut) – 88 Nm (65 lb-ft)
Cutting Height (Approximately) – 25-102 mm (1 – 4 in.)
Cutting Width – 1067 mm (42 in.)
Mower Deck – 122 cm (48 in.)
Blades Rotary – 3
Blade Nut Torque (w/ 5/8 in. Nut) – 88 Nm (65 lb-ft)
Cutting Height (Approximately) – 25-102 mm (1 – 4 in.)
Cutting Width – 1219 mm (48 in.)
Mower Deck – 137 cm (54 in.)
Blades Rotary – 3
Blade Nut Torque (w/ 5/8 in. Nut) – 88 Nm (65 lb-ft)
Cutting Height (Approximately) – 25-102 mm (1 – 4 in.)
Cutting Width – 1371 mm (54 in.)