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John Deere Z850A Zero Turn Mower Specs

John Deere Z850A Engine

Engine Model ................ Kawasaki FX850V
Engine Type ................ 4-cycle vertical shaft V-twin OHV air-cooled gasoline engine
Number of Cylinders ................ 2
Cylinder Liners ................ Cast iron
Displacement, cu.in (cc) ................ 52.02 (852)
Cylinder Bore, in (mm) ................ 3.33 (84.5)
Piston Stroke, in (mm) ................ 2.99 (76.0)
Engine Power, Hp (kW) ................ 31.0 (23.1)
Rated Engine Speed, rpm ................ 3600
Maximum Torque, Nm (ft-lb) ................ 63.2 (46.5)
Torque Speed, rpm ................ 2400
Compression Ratio ................ 8.2:1
Fuel System ................ Carburetor
Carburetor Type ................ Twin barrel, internally vented
Fuel Pump ................ Diaphragm type pulse pump
Governor Type ................ Flyweight all speed governor
Lubrication System ................ Pressure feed by positive displacement pump
Cooling System ................ Forced-air
Ignition System ................ Electronic
Spark Plug Type ................ NGK BPR4ES
Spark Plug Gap, in (mm) ................ 0.027-0.031 (0.70-0.80)
Armature Air Gap, in (mm) ................ 0.008-0.011 (0.20-0.28)
Intake Valve Clearance, in (mm) ................ 0.004-0.006 (0.10-0.15)
Exhaust Valve Clearance, in (mm) ................ 0.004-0.006 (0.10-0.15)
Fuel Tank Capacity, gal (L) ................ 11.8 (44.5)
Oil Capacity, qts (L) ................ 2.5 (2.3)

Electrical System

Electrical System Rating, Volts ................ 12
Charging System ................ Alternator
Alternator Rating, Amps ................ 15
Starting System ................ Electric starter

Power Take Off

PTO Operational Type ................ Independent
PTO Clutch ................ Electric
PTO Drive Type ................ Belt-driven

John Deere Z850A Transmission

Transmission Type ................ Hydrostatic
Number of Forward Gears ................ Infinite
Number of Reverse Gears ................ Infinite
Oil Capacity, qts (L) ................ 2.9 (2.7)
Maximum Forward Speed, mph (kph) ................ 12.0 (19.3)
Maximum Reverse Speed, mph (kph) ................ 6.0 (9.6)

Wheels and Tires

Drive Wheels ................ 2WD 4x2
Steering Configuration ................ Front steer
Steering System ................ Power
Front Tire Size ................ 13x6.50-6
Rear Tire Size ................ 24x12.00-12

Dimensions and Weight

Wheelbase, in (mm) ................ 55 (1390)
Overall Length, in (mm) ................ 85 (2150)
Overall Heigth (ROPS Up), in (mm) ................ 73 (1850)
Overall Heigth (ROPS Folded), in (mm) ................ 47 (1190)
Weight (60" Deck), lb (kg) ................ 1360 (616)
Weight (72" Deck), lb (kg) ................ 1440 (652)

Mower Deck

Mower Deck Type ................ Mid-mount, right-discharge
Cutting Width, in (mm) ................ 60 (1520)
Overall Width, in (mm) ................ 74 (1900)
Cutting Height, in (mm) ................ 1.5-5.0 (37-127)
Number of Blades ................ 3
Blade Engagement ................ Electric
Lift System ................ Mechanical

Mower Deck Type ................ Mid-mount, right-discharge
Cutting Width, in (mm) ................ 72 (1820)
Overall Width, in (mm) ................ 86 (2180)
Cutting Height, in (mm) ................ 1.5-5.0 (37-127)
Number of Blades ................ 3
Blade Engagement ................ Electric
Lift System ................ Mechanical