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Home / Lawn and Garden Tractors / John Deere Lawn Tractors / John Deere LA120

John Deere LA120 Lawn Tractor

The John Deere LA120 lawn tractor was manufactured from 2007 to 2009. The John Deere LA120 driveline consists of Briggs and Stratton 441677 4-cycle V-twin cylinder OHV vertical-shaft air-cooled gasoline engine and Tuff Torq T40 belt-driven hydrostatic transmission with infinite forward and reverse gears.

A 44.2 cu.in (724 cc) engine has a cylinder bore of 3.12" (79 mm), piston stroke of 2.89" (73 mm), and rated power of 21 hp (15.7 kW). Max. forward speed - 5.5 mph (8.8 kph), maximum reverse speed - 3.2 mph (5.1 kph).

The tractor was equipped with a manual steering system, disc brakes, 15x6.00-6 front tires, and 20x10.00-8 rear tires. The wheel base is 49 in (1240 mm). The John Deere LA120 is compatible with a 42" mid-mount 2-blade mower deck with cutting height of 1.0-4.0" (25-102 mm) and mechanical lifting system.

Engine
Engine Model Briggs and Stratton 441677
Engine Type 4-cycle V-twin OHV vertical-shaft air-cooled gasoline engine
Number of Cylinders 2
Displacement, cu.in (cc) 44.2 (724)
Cylinder Bore, in (mm) 3.12 (79.0)
Piston Stroke, in (mm) 2.89 (73.0)
Rated Engine Power, hp (kW) 21.0 (15.7)
Rated Engine Speed, rpm 3300
Idle Speed, rpm 1750
Cylinder Bore Type Cast iron sleeve
Fuel System Type Carburetor
Carburetor Type Float-feed
Fuel Pump Pulse type
Governor Type Mechanical
Lubrication System Full pressure
Air Cleaner Paper cartridge with a foam pre-cleaner
Cooling System Forced air
Ignition System Electronic
Spark Plug Gap, in (mm) 0.030 (0.76)
Magneto Air Gap, in (mm) 0.008-0.012 (0.20-0.30)
Valve Clearance (Intake), in (mm) 0.004-0.006 (0.10-0.15)
Valve Clearance (Exhaust), in (mm) 0.004-0.006 (0.10-0.15)
Fuel Tank Capacity, gal (L) 3.0 (11.5)
Oil Capacity, qts (L) 2.0 (1.9)

Electrical System
Electrical System Rating, Volts 12
Charging System Alternator
Alternator Rating, Amps 9
Starter Type Electric
Number of Batteries 1
Electric Ground Negative

Transmission
Transmission Model Tuff Torq T40
Transmission Type Belt-driven hydrostatic
Number of Forward Speeds Infinite
Number of Reverse Speeds Infinite
Maximum Forward Speed, mph (kph) 5.5 (8.8)
Maximum Reverse Speed, mph (kph) 3.2 (5.1)


Wheels and Tires
Drive Wheels 4x2 2WD
Steering Configuration Front steer
Steering System Manual
Front Tire Size 15x6.00-6
Rear Tire Size 20x10.00-8

Dimensions and Weight
Wheelbase, in (mm) 49 (1240)
Length, in (mm) 68.8 (1740)
Height, in (mm) 44.5 (1120)
Overall Width, in (mm) 51.8 (1310)
Weight, lb (kg) 470 (213)

42" Mower Deck
Mower Deck Type Mid-mount
Number of Blades 2
Cutting Width, in (mm) 42 (1060)
Overall Width, in (mm) 52 (1320)
Cutting Height, in (mm) 1.0-4.0 (25-102)
Spindle Material Aluminum
Deck Drive Belt
Lift System Mechanical

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