Studio rendering of Z998R
Studio rendering of Z998R
Studio rendering of Z998R
Studio rendering of Z998R
Studio rendering of Z998R
Studio rendering of Z998R
Studio rendering of Z998R
Studio rendering of Z998R
Studio rendering of Z998R
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John Deere
Z998R
Commercial Ztrak Zero-Turn Mowers

John Deere Z998R Diesel

Starting at

Fastback™ PRO Rear-Discharge Mower Deck

The Fastback™ PRO rear-discharge system improves safety and productivity by minimizing debris throw and allowing closer mowing near obstacles. Ideal for public spaces, it ensures a tidy operation with better debris control around the operator.

Top‑down view of zero‑turn mower showing the operator area with a yellow seat, control levers, perforated deck surface, and twin mower housings on either side.
Power Through With a Turbo Diesel Engine

The Z998R Diesel ZTrak™ Mower features a turbo‑charged, 3‑cylinder diesel engine delivering 43.4 hp and meeting Final Tier 4 emission standards through an efficient DOC/DPF system. Its design emphasizes fuel economy, low noise, strong torque, and long engine life, supported by components like direct fuel injection, full‑pressure lubrication, and a dual‑element air cleaner. Additional conveniences—including an auto‑bleed fuel system, easy‑access cooling components, and isolated engine mounting—enhance reliability, serviceability, and operator comfort.

Z998R engine
Standard High-Back, Air-Suspension Seat

The Z997R and Z998R Diesel ZTrak™ Mowers feature a standard air‑suspension seat designed to maximize comfort with extensive adjustments for operator size and preference. Operators can fine‑tune weight, height, seat ride stiffness, lumbar support, back‑angle tilt, and fore‑aft positioning to achieve a smooth, ergonomic ride. Durable armrests, resilient seat cushions, a raised seating position, and a convenient retractable seat belt further enhance comfort and ease of use.

High-back, air suspension seat on ZTrak mower
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Specs & Compare
Select up to 4 models to compare specifications
John Deere
Z998R
ZTrak™ Zero-Turn Mower
John Deere
Z994R (Model year 2026)
John Deere
Z997M (Model year 2026)
John Deere
Z997R (Model year 2026)
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Engine

Engine Manufacturer/Model3TNV86C Turbo
Engine PowerGross at 3,000 rpm, PS: 43.4 hp (32.4 kW)Gross at 3,200 rpm, PS: 23.2 hp
17.3 kW
Gross at 3,000 rpm, PS: 37.4 hp
27.5 kW
Gross at 3,000 rpm, PS: 37.4 hp
27.5 kW
Displacement95.7 cu in.77.3 cu in.
1.27 L
100.2 cu in.
1,642 cc
100.2 cu in.
1,642 cc
Displacement1568 cc77.3 cu in.
1.27 L
100.2 cu in.
1,642 cc
100.2 cu in.
1,642 cc
Cylinders3ThreeThreeThree
Crankcase Capacity3.8 U.S. qt3.6 U.S. qt
3.4 L
3.8 U.S. qt
3.6 L
3.8 U.S. qt
3.6 L
Crankcase Capacity3.6 L3.6 U.S. qt
3.4 L
3.8 U.S. qt
3.6 L
3.8 U.S. qt
3.6 L
Oil FilterFull flow, replaceable, spin-on typeFull flow, replaceable, spin-on typeFull flow, replaceable, spin-on typeFull flow, replaceable, spin-on type
LubricationFull pressureFull pressureFull pressureFull pressure
CoolingLiquidLiquidLiquidLiquid
Air CleanerHeavy-duty canister, dry type with safety element and air-restriction indicatorPre-cleaner
Yes

Heavy-duty canister, dry type with safety element and air-restriction indicator
Pre-cleaner
Yes

Heavy-duty canister, dry type with safety element and air-restriction indicator
Pre-cleaner
Yes

Heavy-duty canister, dry type with safety element and air-restriction indicator
Pre-CleanerYes

Fuel System

Fuel TypeDiesel or Biodiesel (up to B20)Diesel or Biodiesel (up to B20)Diesel or Biodiesel (up to B20)Diesel or Biodiesel (up to B20)
Fuel Tank Capacity12 U.S. gal.11.5 U.S. gal.
43.5 L
12 U.S. gal.
45.4 L
12 U.S. gal.
45.4 L
Fuel Tank Capacity45.4 L11.5 U.S. gal.
43.5 L
12 U.S. gal.
45.4 L
12 U.S. gal.
45.4 L
Fuel Tank Switch/Shut-Off ValveYes

Electrical System

Charge System150 amp75 amp150 amp150 amp
Battery Voltage12 V12 V12 V12 V
Cold Cranking Amp At 18 Degrees C490 amp
Hour MeterFull-color touchscreen displayDigital multi-function displayDigital multi-function displayFull-color touchscreen display
Operator Presence Starting SystemStandardStandardStandardStandard

Drivetrain

TransmissionHydrostaticDual hydrostatic wheel drive TuffTorq™ heavy-duty ground drive with cross porting for improved coolingHydrostaticHydrostatic
Wheel MotorsHydro-Gear HGM18L 17.8 cu in. (292 cc)Hydro-Gear HGM18L 17.8 cu in.
292 cc
Hydro-Gear HGM18L 17.8 cu in.
292 cc
Speed Range0-11.5 mph mph0-11.4 mph
0-18.3 km/h
0-11.5 mph
0-18.5 km/h
0-11.5 mph
0-18.5 km/h
Speed Range0-18.5 km/h km/h0-11.4 mph
0-18.3 km/h
0-11.5 mph
0-18.5 km/h
0-11.5 mph
0-18.5 km/h
Forward Speed0-11.5 mph mph
Forward Speed0-18.5 km/h km/h
Reverse Speed0-5 mph mph
Reverse Speed0-8 km/h km/h
Speed Direction And ControlZero turn
Hydraulic Capacity3.2 U.S. qt5.9 U.S. gal.
5.6 L
Tank capacity, 3.2 U.S. gal.
12.1 L
Tank capacity, 3.2 U.S. gal.
12.1 L
Hydraulic Capacity12.1 L5.9 U.S. gal.
5.6 L
Tank capacity, 3.2 U.S. gal.
12.1 L
Tank capacity, 3.2 U.S. gal.
12.1 L
Hydraulic Oil CoolerYesFins and fanYesYes
FilterSpin-on TypeFull flow, replaceable, spin-on typeFull flow, replaceable, spin-on typeFull flow, replaceable, spin-on type

Buyer's note

Warranty36 months or 1500 hours, whichever comes first, no hour limitation for the first 24 months36 months or 1500 hours, whichever comes first, no hour limitation for the first 24 months.36 months or 1500 hours, whichever comes first, no hour limitation for the first 24 months.36 months or 1500 hours, whichever comes first, no hour limitation for the first 24 months.

Tires

Drive Wheels26x14-12 square shoulder 4-ply turf24x12.00-12 4-ply turf, optional 24x12-12 Michelin® Tweel® turf tires26x12-12 square shoulder 4-ply turf, optional 26x12-12 Michelin® Tweel® turf tires26x12-12 square shoulder 4-ply turf, optional 26x12-12 Michelin® Tweel® turf tires
Rear Tires26x14-12 square shoulder 4-ply turf24x12.00-12 4-ply turf, optional 24x12N12 Michelin Tweel turf tires26x12-12 square shoulder 4-ply turf, optional 26x12-12 Michelin Tweel turf tires26x12-12 square shoulder 4-ply turf, optional 26x12-12 Michelin Tweel turf tires
Load Rating4PR4PR4PR4PR

Brakes

Dynamic BrakingDual hand controlled leversTwin motion control leversDual hand controlled leversDual hand controlled levers
Park BrakeInternal wet disk integrated in the transmissionInternal wet disk integrated in the transmissionInternal wet disk integrated in the transmissionInternal wet disk integrated in the transmission
Park Brake ActuationAutomatic engagement when steering levers are outwardFoot brake engagement also brings steering levers to the neutral positionAutomatic engagement when steering levers are outwardAutomatic engagement when steering levers are outward

PTO

TypeHydraulic clutchDiesel or Biodiesel (up to B20)Diesel or Biodiesel (up to B20)Diesel or Biodiesel (up to B20)
DriveInternal wet disk clutch24x12.00-12 4-ply turf, optional 24x12-12 Michelin® Tweel® turf tires26x12-12 square shoulder 4-ply turf, optional 26x12-12 Michelin® Tweel® turf tires26x12-12 square shoulder 4-ply turf, optional 26x12-12 Michelin® Tweel® turf tires

Mower Decks

Mower Deck Size100-in. (254-cm) FastBack™ PRO rear-discharge with 61-in. (155-cm) center deck and two 22-in. (56-cm) wing decks60-in. (152-cm) 7Iron™ PRO side-discharge
72-in. (183-cm) 7Iron™ PRO side-discharge
60-in. (152-cm) 7Iron™ PRO Mulch On Demand™
60-in. (152-cm) FastBack™ PRO rear-discharge
72-in. (183-cm) FastBack™ PRO rear-discharge
60-in. (152-cm) 7Iron™ PRO side-discharge
72-in. (183-cm) 7Iron™ PRO side-discharge
60-in. (152-cm) FastBack™ PRO rear-discharge
72-in. (183-cm) FastBack™ PRO rear-discharge
60-in. (152-cm) 7Iron™ PRO side-discharge
72-in. (183-cm) 7Iron™ PRO side-discharge
72-in. (183-cm) FastBack™ PRO rear-discharge
Deck ConstructionFastBack™ PRO: 7-gauge, 0.179-in. (4.6-mm) fabricated steel7-Iron™ PRO: 7-gauge, 0.179-in. (4.6-mm) one-piece forged steel
FastBack™ PRO: 7-gauge, 0.179-in. (4.6-mm) fabricated steel
7-Iron™ PRO: 7-gauge, 0.179-in. (4.6-mm) one-piece forged steel
FastBack™ PRO: 7-gauge, 0.179-in. (4.6-mm) fabricated steel
7-Iron™ PRO: 7-gauge, 0.179-in. (4.6-mm) one-piece forged steel
FastBack™ PRO: 7-gauge, 0.179-in. (4.6-mm) fabricated steel
DischargeRear-discharge
Height-Of-Cut Range1.5-5 in.Increments
0.25 in.
0.64 cm

1-5.5 in.
2.54-14 cm
Increments
0.25 in.
0.64 cm

1-5.5 in.
2.5-14.0 cm
Increments
0.25 in.
0.64 cm

1-5.5 in.
2.5-14.0 cm
Height-Of-Cut Range2.5-14.0 cmIncrements
0.25 in.
0.64 cm

1-5.5 in.
2.54-14 cm
Increments
0.25 in.
0.64 cm

1-5.5 in.
2.5-14.0 cm
Increments
0.25 in.
0.64 cm

1-5.5 in.
2.5-14.0 cm
Height-Of-Cut Increments0.25 in.
Height-Of-Cut Increments0.64 cm
Cutting Width60/80/100 in.60, 72 in.
152, 183 cm
60, 72 in.
152, 183 cm
60, 72 in.
152, 183 cm
Cutting Width152/203/254 cm60, 72 in.
152, 183 cm
60, 72 in.
152, 183 cm
60, 72 in.
152, 183 cm

Blades

LengthVaries by deck sizeVaries by deck sizeVaries by deck sizeVaries by deck size
Thickness0.25 (0.64 cm)
Blade Tip SpeedApproximately 16,5007Iron PRO: Approximately 16,500 fpm
60-in. (152-cm) FastBack: Approximately 15,000 fpm
72-in. (183-cm) FastBack: Approximately 17,000 fpm
7Iron PRO: Approximately 18,000 fpm
60-in. (152-cm) FastBack: Approximately 15,000 fpm
72-in. (183-cm) FastBack: Approximately 17,000 fpm
7Iron PRO: Approximately 18,000 fpm
72-in. (183-cm) FastBack: Approximately 17,000 fpm
Number5ThreeThreeThree

Wheels

Caster Wheel TypeFlat freeFlat freeFlat freeFlat free
Caster Wheels15x6-613x5.0-6 flat free15x6-6 flat free15x6-6 flat free
Front Anti-Scalp RollersCenter deck: Left, right, and center; Wing decks: inboard, castering outboardLH, RH, CenterLeft, center, rightLeft, center, right
Rear Anti-Scalp RollersCenter deck: Left, right, and center; Wing decks: outboardStandardLeft, center, rightLeft, center, right

Dimensions

Length106.5 in. (271 cm)Varies by deck sizeVaries by deck sizeVaries by deck size
Height - With ROPS Up77.3 in.
Height - With ROPS Up196 cm
Height - With ROPS Down50.9 in.
Height - With ROPS Down129 cm
Weight2925 lb.1,711 to 1,810 lb
776 to 821 kg
2180 to 2313 lb
989 to 1049 kg
2216 to 2349 lb
1005 to 1065 kg
Weight1327 kg1,711 to 1,810 lb
776 to 821 kg
2180 to 2313 lb
989 to 1049 kg
2216 to 2349 lb
1005 to 1065 kg

Operation

Rollover Protective Structure (ROPS)YesYesYesYes
Slope Operating Limit17 degree (angle)17 degrees (material collection systems, weather enclosures, or other attachments increase the risk of a rollover)17 degrees (material collection systems, weather enclosures, or other attachments increase the risk of a rollover)17 degrees (material collection systems, weather enclosures, or other attachments increase the risk of a rollover)

Additional Information

Date Collected2025-11-01T00:00:001-Sep-20251-Nov-20251-Nov-2025