John Deere S120

S120 Lawn Tractor



  • 22 hp (16.4 kW)* V-Twin Engine
  • 42-in. Edge™ Mower Deck
  • Hydrostatic Transmission w/side-by-side pedals
  • Easy Change™ 30-Second Oil Change System
  • 15-in Open-Back seat
  • Easy to read fuel gauge
  • 2 year/120 hour bumper-to-bumper warranty

** Manufacturer’s suggested list price shown. Retail prices may vary by dealer. Unless stated otherwise, taxes, freight, setup, delivery and other dealer specific charges not included in the pricing.  Pricing and specifications subject to change without notice.

Engine power22 hp<br> 16.4 kW
Oil changeJohn Deere Easy Change&trade; 30-second oil change system
Engine manufacturer/model44N677 (M44)
Transaxle typeTLT200 hydrostatic, two-wheel drive
Transaxle controlSide-by-side pedals
Rear tires20x8-8
Lift system typeSpring-assisted hand-grip lever
Cutting widthEdge&trade; mower deck, 42 in.<br> 107 cm
U.S. warranty2 year/120 hour bumper-to-bumper* (*Term limited to years or hours used, whichever comes first, and varies by model. See the LIMITED WARRANTY FOR NEW JOHN DEERE TURF AND UTILITY EQUIPMENT at or for details.)
Power22 hp<br> 16.4 kW
Displacement44.2 cu in.<br> 724 cm
Manufacturer/model44N677 (M44)
TypeOverhead valve, full-pressure lube, oil filter
Choke/speed controlSingle lever with spring-return on choke
Cooling methodAir
Air cleanerCartridge
Oil changeJohn Deere Easy Change 30-second oil change system
Fuel deliveryPulse pump and carburetor
Fuel gaugeEasy-read on dash
Fuel tank locationRear
Fuel fill openingCenter, 1.75 in.<br> 4.45 cm
Fuel tank capacity2.4 U.S. gal.<br> 9.1 L
Battery12 V<br> 300 CCA
Charging systemRegulated, 8 amp
Engine starterBendix type
HeadlightsTwo standard, incandescent
Taillights or reflectorNo
Backup lightsNo
Rear work lightsNo
12-V outletNo
TypeHydrostatic, 2-wheel drive
ControlSide-by-side pedals
Cruise controlStandard
Oil coolerFins and fan on transaxle
Oil filterYes, not serviceable
Differential lockNo
Forward speed0-5.5 mph<br> 0-8.9 km/h
Reverse speed0-3.2 mph<br> 0-5.2 km/h
BrakesInternal wet disk
FrameFull-length welded steel
Weight bracketOptional rear
Receiver hitchNo
Front axleCast-iron front axle, powdered-metal front wheel bushings
Spindle bushingsNo
Front tires15x6-6
Rear tires20x8-8
Hood materialMolded-in color material reduces sound, will not rust or dent
Fender deck materialStamped steel
Floor matsYes, with debris removing channels
StorageStorage tray with cover
Service interval decalYes
Fender handles/gripsNo
Cup holderYes
Equipment mountingCargO Mount&trade; system
TypeSector and pinion with single drag link and tie rod
Four-wheel steerNot available on this model
Steering wheelStandard, diameter - 12 in.<br> 30.5 cm
Tilt steering wheelNo
Turning radius18 in.<br> 45.7 cm
Uncut circle radius25 in.<br> 63.5 cm
TypeTwo piece with open-back
Seat back height15 in.<br> 38 cm
Fore-aft adjustmentWhile seated, 5.5 in.<br> 14 cm
Seat suspensionTilt, two coil springs
TypeSpring-assisted hand-grip lever
Hydraulic outletsNo
Mower cut height13 positions, 1-4 in.<br> 2.5-10.2 cm
Cut height increments0.25 in.<br> 0.64 cm
Preset cut heightNo
TypeSide discharge
Cutting widthEdge&trade; mower deck, 42 in.<br> 107 cm
ConstructionStamped steel deck shell
Mower deck materialSteel, 13 gauge<br> 0.09 in.<br> 2.3 mm
Mower wash portYes
Mower drive systemManual power take-off (PTO)
Mower wheelsTwo
Mower wheel adjustmentOne bolt
Mower level adjustmentEasy-level deck
TypeSlide under tractor
Front draft armsOne spring clip
Rear draft armsTwo spring clips
Mower wheels rotateNo
Drive systemSingle belt
Meets ANSI standardYes

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