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Kubota Z251 Zero Turn Mower Specs

Kubota Z251 Engine

Kubota Z251BR-54 Engine

Engine Model ............... Briggs and Stratton 44T977 (GH733V-1)
Engine Type ............... 4-cycle vertical-shaft V-twin OHV air-cooled gasoline
Number of Cylinders ............... 2
Displacement, cu.in (cc) ............... 44.2 (724)
Engine Bore, in (mm) ............... 3.12 (79.0)
Engine Stroke, in (mm) ............... 2.89 (73.0)
Crankshaft Type ............... Straight
Maximum Engine Power, hp (kW) ............... 25.0 (18.5)
Rated Engine Speed, rpm ............... 3600
Idle Speed, rpm ............... 1400-1600
Cylinder Bore Type ............... Cast iron
Fuel System ............... Carburetor
Fuel Pump ............... Integral type
Governor Type ............... Mechanical
Lubrication System ............... Full pressure with oil filter
Cooling System ............... Forced-air
Ignition System ............... Electronic Spark
Spark Plug ............... Champion RC12YC
Spark Plug Gap, in (mm) ............... 0.030 (0.76)
Armature Air Gap, in (mm) ............... 0.010-0.014 (0.25-0.36)
Air Cleaner ............... Multi-stage filter
Intake Valve Clearance, in (mm) ............... 0.003-0.005 (0.08-0.13)
Exhaust Valve Clearance, in (mm) ............... 0.005-0.007 (0.13-0.18)
Fuel Tank Capacity, gal (L) ............... 4.3 (16.3)
Oil Capacity, qts (L) ............... 2.0 (1.9)

Kubota Z251KH-54 Engine

Engine Model ............... Kohler Confidant ZT740 (GH750V)
Engine Type ............... 4-cycle V-twin cylinder OHV vertical shaft air-cooled gasoline engine
Number of Cylinders ............... 2
Displacement, cu.in (cc) ............... 45.8 (747)
Engine Bore, in (mm) ............... 3.27 (83.0)
Engine Stroke, in (mm) ............... 2.72 (69.0)
Rated Engine Power, hp (kW) ............... 25.0 (18.6)
Rated Engine Speed, rpm ............... 3600
Maximum Torque, Nm (ft-lbs) ............... 57.5 (42.4)
Torque Speed, rpm ............... 2800
Compression Ratio ............... 9.1:1
Fuel System ............... Carburetor
Carburetor Type ............... Fixed main jet
Fuel Pump ............... Pulse type
Governor Type ............... Mechanical
Lubrication System ............... Full pressure
Oil Filter ............... Full-flow type
Air Cleaner Type ............... Dual element
Cooling System ............... Forced-air
Ignition System ............... Electronic
Spark Plug Type ............... Champion RC12YC or NGK CS6
Spark Plug Gap, in (mm) ............... 0.03 (0.76)
Module Air Gap, in (mm) ............... 0.008-0.012 (0.203-0.305)
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) ............... 4.3 (16.3)
Oil Capacity, qts (L) ............... 2.0 (1.9)

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 Speed, rpm ............... 3600

Kubota Z251 Transmission

Transmission Model ............... Hydro-Gear ZT-3100
Transmission Type ............... Dual hydrostatic
Number of Forward Gears ............... Infinite
Number of Reverse Gears ............... Infinite
Oil Capacity, qts (L) ............... 5.0 (4.7)
Maximum Forward Speed, mph (kph) ............... 8.0 (12.9)
Maximum Reverse Speed, mph (kph) ............... 4.0 (6.4)

Wheels and Tires

Drive Wheels ............... 2WD 4x2
Steering Configuration ............... Front steer
Steering System ............... 2-hand levers
Front Tire Size ............... 11x4.00-5
Rear Tire Size ............... 22x10.00-14

Dimensions and Weight

Wheelbase, in (mm) ............... 45.5 (1155)
Overall Length, in (mm) ............... 76.4 (1940)
Overall Heigth, in (mm) ............... 65 (1650)
Overall Width, in (mm) ............... 47.5 (1205)
Weight (Z251BR), lb (kg) ............... 750 (340)
Weight (Z251KH), lb (kg) ............... 772 (350)

Mower Deck

Mower Deck Model ............... RCK54P-127ZA
Mower Deck Type ............... Mid-mount
Deck Construction ............... Fabricated
Number of Blades ............... 3
Cutting Width, in (mm) ............... 54 (1370)
Total Width, in (mm) ............... 67.3 (1710)
Cutting Height, in (mm) ............... 1.5-4.5 (37-114)
Blade Engagement ............... Electric
Blade Length, in (mm) ............... 18.7 (475)
Lift System ............... Mechanical, foot operated