Kubota ZD25

Kubota ZD25The Kubota ZD25 is a zero-turn mower model from the ZD series, manufactured from 2005 to 2006 by Kubota. It was available in two-wheel drive (2WD) version.

The Kubota ZD25 is equipped with a 1.0 L (61.1 cu·in) three-cylinder diesel engine with 76.0 mm (2.99 in) of the cylinder bore and 74.0 mm (2.91 in) of the piston stroke, and a hydrostatic transmission with infinite forward and reverse gears.

The Kubota ZD25 zero-turn mower features:

  • The Kubota D1005 diesel engine which produces 25.3 PS (18.6 kW; 25.0 HP) at 3,000 rpm of horsepower.
  • Differential power steering
  • Two-post foldable ROPS
  • Independent front PTO

General specifications

General Specifications
ModelKubota ZD25
Tractor typeZero-turn mower
Production years2005-2006
Dimensions and weight
Length2,260 mm (89 in)
Height1,910 mm (75.2 in)
Wheel base1,360 mm (53.5 in)
Weight750 kg (1,653 lbs)
Fuel capacity
Fuel tank capacity30.0 liters (7.9 US gal.; 6.6 Imp. gal)


Engine Specifications
Engine modelKubota D1005
Engine type4-stroke, SOHC, three-cylinders
Displacement1.0 L, 1,001 cm2, (61.1 cu·in)
Bore and stroke76.0 mm x 73.6 mm (3.0 in x 2.9 in)
Max. horsepower25.3 PS (18.6 kW; 25.0 HP) at 3,000 rpm
Cooling systemLiquid-cooled
Fuel usedDiesel fuel
Starting systemElectric starting with 12V starter
Starting support deviceGlow plug in combustion chamber
GovernorAll speed mechanical governor
Charging systemAlternator 12V
PTO shaft rotationCounterclockwise
Valve clearance
Intake valve clearance:0.145-0.185 mm (0.0057-0.0073 in)
Exhaust valve clearance:0.145-0.185 mm (0.0057-0.0073 in)
Oil system
Lubrication system:Forced lubrication by trochoid pump
Oil type:CF or higher
Recommended oil:SAE 10W-30, 10W-40
Oil pressure: At idle speed: 49 MPa (0.5 kgf/cm2, 7 psi)
At rated speed: 196 to 441 MPa (2.0-4.5 kgf/cm2, 28 to 64 psi)
Oil filter:Full flow paper filter (Cartridge type)
Oil pressure indicating:Electrical type switch
Oil and oil filter change interval:Every 200 hours
Fuel system
Fuel injection pump:Bosch MD type mini fuel injection pump
Injection nozzle:Mini Nozzle (DNOPD)
Firing order:1-2-3
Injection pressure:13.73 MPa (140 kgf/cm2, 1,991 psi)

Transmission and chassis

Chassis, steering and brakes
Chassis4×2 2WD
Steering typeDifferential power
Transmission manufacturer or model
Transmission typeHydrostatic
GearsInfinite forward and reverse
Speed Forward: 15.0 kmh (9.3 mph)
Reverse: 8.4 kmh (5.2 mph)


Front tiresLawn/turf: 15×6.0-6
Rear tiresLawn/turf: 24×12-12

PTO (Power take-off shaft)

Middle PTO typeIndependent
Middle PTO speed

Electrical system

Electrical system
Charging system
Charging amps
Battery12V, CCA: 450A


Kubota RCK60-28Z: 60″ mid-mount mower deck with 3-blade
Cutting width1,520 mm (60 in)
Overall width1,840 mm (72.8 in)
Cut heigh20-120 mm (1-5 in)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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We try to use official documentation and verify the published data, but errors may occur. In addition, specifications of machinery and equipment may vary depending on markets and modifications. We do not recommend the use of this data for spare parts or repairs. Use official service manuals or parts catalogs for your product.

1 Comment

  1. Okay I got this kubota zD25 and I took it to the shop a local fix it guy because it stopped firing he later told me he found water in my tank so he said he drained the tanks and cleaned the injectors but I don’t see any marks where the injectors were touched it is now running but not functioning as it should it has a load and when engaged it looses power in grass that it use to chomp do you think I need to have my injectors cleaned and put all new fuel filter on to correct this issue or what do you advise I do to get my mower back at top running order?

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