John Deere S120 specs
Lawn tractor · 100 Series · John Deere · 1 variant · Last verified 2026-10-26
Specifications
Each value links to the manufacturer document and page it came from. “Not yet verified” means we hold a reading that has not passed our checks, so we do not show it. A dash means the sources we used do not publish it.
Engine
| Engine model | 44N677 (M44)[product page] |
|---|---|
| Engine spec number | Not yet verified |
| Displacement | 724 cc[brochure p.22] |
| Cylinders | V-twin[brochure p.22] |
| Power (as published) | 22 hp[brochure p.22]Brochure footnote: horsepower provided by the engine manufacturer for comparison; actual operating hp is less. |
| Air filter type | Cartridge[brochure p.22] |
Mower deck
| Blades | Two[brochure p.22] |
|---|---|
| Cutting height range | 1 to 4 in.[brochure p.22] |
| Deck material | Stamped steel[brochure p.22] |
| Blade engagement (PTO) | Not yet verified |
| Deck type | Convertible[parts guide p.2] |
| Deck width | 42 in.[brochure p.22] |
Drivetrain
| Transmission type | Hydrostatic[brochure p.22] |
|---|---|
| Max forward speed | 5.5 mph[brochure p.22] |
| Max reverse speed | 3.2 mph[brochure p.22] |
Fuel
| Fuel tank capacity | 2.4 gal (9.08 L)[brochure p.22] |
|---|
Tires and wheels
| Front tires | 15x6-6[brochure p.22] |
|---|---|
| Rear tires | 20x8-8[product page] |
Dimensions and weight
| Turning radius | 18 in.[brochure p.22] |
|---|---|
| Height | Not yet verified |
| Overall length | Not yet verified |
| Overall width, deflector down | 55.2 in.[brochure p.22] |
| Seat | 15 in. (38.1 cm) open back[brochure p.22]seat height row; cell continues 'open back' on next line |
| Weight | Not yet verified |
Warranty
| Bumper-to-bumper warranty (hours) | 120 hr[brochure p.22] |
|---|---|
| Bumper-to-bumper warranty (years) | 2 yr[brochure p.22] |
Variants
Each SKU, model number, deck option and serial-range revision is its own variant. Values are never merged across variants.
Engine
Briggs & Stratton 44N677 is linked to variant S120 because the engine model is printed on a manufacturer document for this machine. Full maintenance specs, parts and every machine using it are on the engine page.
| Spec | as-installed-jd-s130-S13044N677 as installed in John Deere S130 (S130) | as-installed-jd-s120-S12044N677 as installed in John Deere S120 (S120) |
|---|---|---|
| Displacement | 724 cc[brochure p.22]Same for all 2 variants | |
| Oil type | John Deere Turf-Gard 10W-30 (TY22029)[parts guide p.1] | John Deere Turf-Gard 10W-30 (TY22029)[parts guide p.1] |
| Oil capacity | 2.6 L (2.8 qt)[parts guide p.1] | 2.6 L (2.8 qt)[parts guide p.1] |
Maintenance specs and parts
Oil and service specs
| Engine oil capacity | 2.6 L (2.8 qt)[parts guide p.1] |
|---|---|
| Oil change system | John Deere Easy Change 30-second oil change system[product page] |
| Engine oil type | John Deere Turf-Gard 10W-30 (TY22029)[parts guide p.1] |
Part numbers
“Find this part” links are plain searches at the manufacturer or a parts retailer; we earn nothing from them (disclosure). Confirm against your serial number before ordering.
Engine service parts (from Briggs & Stratton 44N677)
| Spec | as-installed-jd-s130-S13044N677 as installed in John Deere S130 (S130) | as-installed-jd-s120-S12044N677 as installed in John Deere S120 (S120) |
|---|---|---|
| Oil filter | AUC12916[parts guide p.1]USA, Canada and MexicoOil filter (Easy Change system)Find this part: Briggs & Stratton Amazon Sears PartsDirect | AUC12916[parts guide p.1]USA, Canada and MexicoFind this part: Briggs & Stratton Amazon Sears PartsDirect |
| Air filter | MIU14395[parts guide p.1]Find this part: Briggs & Stratton Amazon Sears PartsDirect | MIU14395[parts guide p.1]Find this part: Briggs & Stratton Amazon Sears PartsDirect |
| Fuel filter | AM116304[parts guide p.1]Find this part: Briggs & Stratton Amazon Sears PartsDirect | AM116304[parts guide p.1]Find this part: Briggs & Stratton Amazon Sears PartsDirect |
| Spark plug | MIU11020[parts guide p.1]Spark plugChange after 50 Hrs.Find this part: Briggs & Stratton Amazon Sears PartsDirect | MIU11020[parts guide p.1]Change every 50 hours/ Annually (Whichever comes first).Find this part: Briggs & Stratton Amazon Sears PartsDirect |
Serial tag location
The manufacturer documents we used do not say where the serial tag is. Check the operator's manual.
Manuals and sources
All links go to the manufacturer. Dates are printed dates unless marked otherwise.
- parts guideMaintenance Reminder Sheet S120 42 in (undated edition) www.deere.com · undated (file metadata 2020-12-21) · retrieved 2026-10-26
- parts guideDeere Replacement Parts Guide S120 w/42 in deck www.deere.com · dated 2023-11 · retrieved 2026-10-26
- brochureJohn Deere Riding Lawn Tractors brochure (EN) johndeere.widen.net · undated (file metadata 2026-10-21) · retrieved 2026-10-26
- product pagewww.deere.ca www.deere.ca · live web page · retrieved 2026-10-26
- product pagewww.deere.com www.deere.com · live web page · retrieved 2026-10-26
Sources we could not obtain
- operator manual: Deere operator manuals not reachable from the box (com); serial tag location not sourced.
Recalls
CPSC recalls for John Deere S120
No CPSC recall found as of 2026-10-26. Search CPSC
Engine Briggs & Stratton 44N677: No CPSC recall found as of 2026-10-26.
A listed recall usually covers only the serial, spec or model numbers in the CPSC notice; check your machine. Try the recall lookup.
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Last verified against manufacturer documents: 2026-10-26. Spotted an error? See contact.