Z994R Diesel ZTrak zero‑turn commercial mower with green frame, yellow seat, and large wheels.
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John Deere
Z994R
Commercial Ztrak Zero-Turn Mowers

John Deere Z994R Diesel

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7-Iron™ PRO Deck

This mower is equipped with a 7-Iron PRO side-discharge deck stamped from 7-gauge steel, offering superior durability and performance. The deck design provides a high-quality cut with excellent material processing and discharge capabilities.

Studio close-up of a 7-Iron™ PRO Deck
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.
ComfortGlide™ Seat System

The ComfortGlide™ seat system features adjustable suspension, allowing operators to transition more smoothly over bumps. It can adjust fore and aft, absorbing impacts for reduced operator fatigue during long hours of operation.

Close-up of mower seat with green accent panels and armrests, mounted on a black equipment frame with visible seat adjustment knob, control levers, and roll bar behind.
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Specs & Compare
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John Deere
Z994R
ZTrak™ Zero-Turn Mower
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Z998R (Model year 2026)
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Engine

Engine Manufacturer/Model3TNV80F
Engine PowerGross at 3,200 rpm, PS: 24.7 hp (18.4 kW) Gross at 3,000 rpm, PS: 43.4 hp
32.4 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
Displacement77.3 cu in.95.7 cu in.
1,568 cc
100.2 cu in.
1,642 cc
100.2 cu in.
1,642 cc
Displacement1267 cc95.7 cu in.
1,568 cc
100.2 cu in.
1,642 cc
100.2 cu in.
1,642 cc
Cylinders3ThreeThreeThree
Crankcase Capacity3.6 U.S. qt3.8 U.S. qt
3.6 L
3.8 U.S. qt
3.6 L
3.8 U.S. qt
3.6 L
Crankcase Capacity3.4 L3.8 U.S. qt
3.6 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 Capacity11.5 U.S. gal.12 U.S. gal.
45.4 L
12 U.S. gal.
45.4 L
12 U.S. gal.
45.4 L
Fuel Tank Capacity43.5 L12 U.S. gal.
45.4 L
12 U.S. gal.
45.4 L
12 U.S. gal.
45.4 L
Fuel Tank Switch/Shut-Off ValveYes

Electrical System

Charge System75 amp150 amp150 amp150 amp
Battery Voltage12 V12 V12 V12 V
Cold Cranking Amp At 18 Degrees C600 amp
Hour MeterDisplay panel including hour meter, fuel level, engine speed, system voltage, low engine oil pressure indicator, starting interlock indicators (PTO, operator presence, park brake), caution warning, stop warning, and on-board diagnosticsFull-color touchscreen displayDigital multi-function displayFull-color touchscreen display
Operator Presence Starting SystemStandardStandardStandardStandard

Drivetrain

TransmissionDual hydrostatic wheel drive TuffTorq heavy-duty ground drive with cross porting for improved cooling HydrostaticHydrostaticHydrostatic
Speed Range0-11.4 mph mph0-11.5 mph
0-18.5 km/h
0-11.5 mph
0-18.5 km/h
0-11.5 mph
0-18.5 km/h
Speed Range0-18.3 km/h km/h0-11.5 mph
0-18.5 km/h
0-11.5 mph
0-18.5 km/h
0-11.5 mph
0-18.5 km/h
Forward Speed0-11.4 mph mph
Forward Speed0-18.3 km/h km/h
Reverse Speed0-4.5 mph mph
Reverse Speed0-7.2 km/h km/h
Speed Direction And ControlZero turn
Hydraulic Capacity5.9 U.S. qtTank capacity, 3.2 U.S. gal.
12.1 L
Tank capacity, 3.2 U.S. gal.
12.1 L
Tank capacity, 3.2 U.S. gal.
12.1 L
Hydraulic Capacity5.6 LTank capacity, 3.2 U.S. gal.
12.1 L
Tank capacity, 3.2 U.S. gal.
12.1 L
Tank capacity, 3.2 U.S. gal.
12.1 L
Hydraulic Oil CoolerFins and fanYesYesYes
FilterInternal, replaceableFull 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 Wheels24x12.00-12 4-ply turf, optional 24x12-12 Michelin Tweel turf tires26x14-12 square shoulder 4-ply turf26x12-12 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 Tires24x12.00-12 4-ply turf, optional 24x12-12 Michelin Tweel turf tires26x14-12 square shoulder 4-ply turf26x12-12 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 BrakingTwin motion control leversDual hand controlled 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 ActuationFoot brake engagement also brings steering levers to neutralAutomatic engagement when steering levers are outwardAutomatic engagement when steering levers are outwardAutomatic engagement when steering levers are outward

PTO

TypeElectric clutchDiesel or Biodiesel (up to B20)Diesel or Biodiesel (up to B20)Diesel or Biodiesel (up to B20)
DriveV-belt26x14-12 square shoulder 4-ply turf26x12-12 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 Size60-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 100-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) 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 Construction7Iron™ 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 FastBack™ 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
DischargeSide-discharge, Mulch On Demand™, Rear-discharge
Height-Of-Cut Range1-5.5 in.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
Increments
0.25 in.
0.64 cm

1-5.5 in.
2.5-14.0 cm
Height-Of-Cut Range2.54-14 cmIncrements
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
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 Width60/72 in.60, 80, 100 in.
152, 203, 254 cm
60, 72 in.
152, 183 cm
60, 72 in.
152, 183 cm
Cutting Width152/183 cm60, 80, 100 in.
152, 203, 254 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 in (0.64 cm)
Blade Tip SpeedSide discharge 7Iron™ PRO: approximately 17,000 fpm; Rear discharge FastBack™ PRO: 60-in.: approximately 15,300 fpm; 72-in.: approximately 17,000 fpmApproximately 16,500 fpm7Iron 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
Number3FiveThreeThree

Wheels

Caster Wheel TypeFlat freeFlat freeFlat freeFlat free
Caster Wheels13x6.5-615x6-6 flat free15x6-6 flat free15x6-6 flat free
Front Anti-Scalp RollersLH, RH, CenterCenter deck: Left, right, and center
Wing decks: inboard, castering outboard
Left, center, rightLeft, center, right
Rear Anti-Scalp RollersStandardCenter deck: Left, right, and center
Wing decks: outboard
Left, center, rightLeft, center, right

Dimensions

Length88.6 in. (225 cm)Varies by deck sizeVaries by deck sizeVaries by deck size
Width - With Chute Down 74, 86 in.
Width - With Chute Down188, 218 cm
Width - Rear Discharge63.5, 75.8 in.
Width - Rear Discharge161.3, 192.5 cm
Height - With ROPS Up73 in.
Height - With ROPS Up185 cm
Height - With ROPS Down47 in.
Height - With ROPS Down119 cm
Weight1700 - 1793 lb.2925 lb
1327 kg
2180 to 2313 lb
989 to 1049 kg
2216 to 2349 lb
1005 to 1065 kg
Weight771 - 813 kg2925 lb
1327 kg
2180 to 2313 lb
989 to 1049 kg
2216 to 2349 lb
1005 to 1065 kg

Operation

Rollover Protective Structure (ROPS)YesYesYesYes

Additional Information

Date Collected2026-08-03T00:00:001-Nov-20251-Nov-20251-Nov-2025