The D120 combines dependability, durability and power in every aspect of its construction, including a Briggs & Stratton engine, a fully welded steel frame, and a cast-iron front axle.
Operating the mower is a breeze, too, with an ergonomic operator station, quality headlights, and an infinite choice of ground speeds.
Easy to own. Easy to operate. Easy to maintain. The D120 Lawn Tractor.
A 21-horsepower* Briggs & Stratton® engine has plenty of power and torque to handle tough mulching, mowing, and bagging conditions:
No-tools oil drain valve provides easy access for oil changes.
No-tools oil drain valve
*Engine horsepower is provided by the engine manufacturer for comparison purposes. The actual operating horsepower will be less.
Briggs & Stratton is a U.S.-registered trademark of Briggs & Stratton Corporation.
The solid one-piece frame is constructed of 12-gauge
(0.11-in., 3.0-mm) steel:
Solid one-piece frame
Rear CargO Mounts Front CargO Mounts Sun canopy is mounted with CargO Mounts
The CargO Mount system is a combination of front and rear mounting points providing convenient and easy installation of the sun canopy, rear bagger, and other attachments.
Front axle and wheel spindle
The front axle is constructed of solid cast iron that will not bend:
A Kanzaki® Tuff Torq® hydro/automatic transmission gives an infinite choice of speeds and makes changing the direction of travel easy:
Hydro/automatic foot control pedals
Appropriate transmissions are used in each model, depending on rear tire size and tractor performance requirements to ensure excellent performance and reliability:
Standard cruise control (D120, D130, D140, D150, D160, D170)
Easy-to-use cruise control option maintains the tractor's speed for mowing larger areas.
Cruise control lever
Kanzaki is a U.S.-registered trademark of Kanzaki Kokyukoki Manufacturing Company. Tuff Torq is a U.S.-registered trademark of Tuff Torq Corporation.
UV-resistant JD Loy hood Quality headlights for good visibility
The hood is made of injection-molded, UV-resistant JD Loy polymer:
Three-spoke steering wheel for greater operator comfort and control.
Ignition switch is on the dash for starting ease.
Wide footrest areas with non-slip, anti-vibration rubber footpads are provided for operator comfort and safety.
Comfortable operator station
Comfortable seat Easily adjusted seat
Operator seat can be easily adjusted forward or rearward while in the seat, with seat travel of 5-1/2-in. and 10 different positions.
Seat can be tilted forward for protection from the elements and to provide easy access to the fuel tank.
Beverage holder (shown on D160) Storage compartment (shown on D160)
Beverage holder and storage compartment is found on the right side fender for added value and operator convenience.
The fuel tank gauge allows the operator to tell how much fuel is in the tank without leaving the seat:
Fuel tank gauge
Mowing while backing up is strongly discouraged.
An operator who deems it necessary and chooses to keep the mower (or other implement) engaged while backing up should first bring the tractor to a stop and look behind the tractor to be sure there are no bystanders. Then actuate (push in) the RIO button. The RIO button must be held down in the reverse implement position as the shift lever is moved into reverse (reverse foot pedal is depressed on automatic drive models).
The operator may then release the button and the mower will continue to operate while they are backing up and also when they resume forward operation. The next time the operator chooses to keep the mower engaged while backing up, they must repeat this procedure. If the mower (PTO) is engaged and the operator shifts into reverse or depresses the reverse pedal prior to pressing the RIO button, ignition to the engine will be shut off. The engine will stop unless the operator either pushes on the RIO switch or shifts out of reverse.
If the engine does stop, the operator must return the mower engagement (PTO) switch or lever to the ''off'' position, depress the brake pedal, and then turn the ignition switch to restart the engine.
The Edge Cutting System has been trademarked to emphasize the advantages of the John Deere mower deck designs. They give the mower superior convenience, performance, and reliability.
42-in. mower deck
The 42-in. two-spindle, three-in-one mower is constructed of 12-gauge (0.105-in., 2.7-mm) steel for long life:
The mower deck has a rolled lip to provide greater strength and protection.
A patented blade-to-spindle design provides a unique mounting system for the mower blade that gives extra safety and convenience.
A cut-and-throw 6-1/2 bushel rear bagger is sold separately.
Mower wash port
Mower wash port Mower wash port with hose connector
A wash port is provided to make cleaning the underside of the mower deck easy:
StarLock™ blade design
The StarLock blade design keeps the blade bolt at the correct torque for easy removal.
Optional blades for difficult mulching or bagging conditions are available.
StarLock blade design
Mower deck height adjustment
Mower deck height adjustment lever
Spring-assisted, low-effort lift lever simplifies setting and adjusting the mower cut height:
Specs & Compare
|Select up to 4 models to compare specifications||
D120 Lawn Tractor
|Horsepower||21 hp (15.7 kW)|
|Displacement||33 cu. in. (540 cc)|
|Cut Width||42-in (107 cm)|
|Cut Height||1 to 4-in (25.4 to 102 mm)|
|Mower Deck Material||0.105 in. (2.7 mm) 12 gauge steel|
|Turning Radius||18-in (45 cm)|
|12-Volt power Outlet||Not available|
|Fuel Tank Capacity||2.4 gal. (9.08 L)|
|Type of Fuel||Unleaded (87 octane min.)|
|Fuel Filter||Replaceable, in fuel line|
|Forward||0-5.5 mph (8.9 km/h)|
|Reverse||0-3.2 mph (5.1 km/h)|
|Height||15-in (38.1 cm)|
|Front psi||14 psi (97 kPa)|
|Rear psi||10 psi (69 kPa)|
|Overall Length||69.9-in (177.5cm)|
|Overall Width (deflector down)||52-in (132 cm)|
|Height||46-in (117 cm)|
|Net Weight||452 lb. (205 kg)|
|Steering Wheel||Standard design|
|Storage Compartment||Storage w/cover|
|Warranty||2 years or 120 hour limited warranty|
Product modules and features has been compiled for worldwide circulation with general information, pictures, and descriptions of features not available in all countries. In some countries, products and accessories may require modifications or additions to ensure compliance with local regulations. Contact your local John Deere dealer for details.