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Kohler 125REOZJ4 Generator Set

The Kohler 125REOZJ4 is a 125 kW (163 kVA) Diesel standby generator set powered by a John Deere 6068HFG08 engine. It is available at 120/208 V, 120/240 V, 277/480 V and 347/600 V, 3-phase and 60 Hz. It holds about 15.6 L (4.1 gal) of oil and 35.6 L (9.4 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 2 batteries rated 400 CCA at 12 V. The set measures 3531×1191×2276 mm (139.0×46.9×89.6 in), weighs about 3501 kg (7718 lb) and produces 70 dBA at 7 m. An integrated tank holds 923 L (243.8 gal), roughly 24 hours of runtime. The same 6068HFG08 engine also powers generator sets from MQ Power.

125 kW
Standby
6.8 L
Displacement
15.6 L
Oil capacity
5
Document types

How to read your Kohler serial & model number →

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power125 kW
Standby kVA163
Prime power99 kW
EmissionsTier 4 Final
ControllerDecision-Maker 3500
Oil capacity15.6 L
AlternatorKohler 4R13X
Voltage options120/208 V, 120/240 V, 277/480 V, 347/600 V
Phase3
Power factor0.8
Circuit breaker600 A
Battery cranking400 CCA
Battery voltage12 V
Battery quantity2
Coolant capacity35.6 L
Max ambient50 °C
Dimensions (L×W×H)3531×1191×2276 mm
Dry weight3501 kg
Sound level70.0 dBA @ 7 m
Fuel tank923.0 L
Tank runtime24 hr

Engine

John Deere 6068HFG08
Oil capacity15.6 L
Coolant capacity35.6 L
Displacement6.8 L
AspirationTurbocharged, Charge Air Cooled
Rated speed1800 rpm

Maintenance & consumables

for the John Deere 6068HFG08
ItemSpecCapacityPart #Interval
Fuel filterPrimary find
Oil filterCartridge×1 find

Compatible filters for the John Deere 6068HFG08 — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.

  • Fuel filter (primary): Kohler GM50006 Kohler GM48727 Kohler GM50074 John Deere AT433554 John Deere RE522688
  • Oil filter: Kohler GM32809 Kohler 360031 Kohler 223604 Kohler ED0021752840S Kohler 223673

Common questions

What is the power rating of the Kohler 125REOZJ4?

The Kohler 125REOZJ4 is rated 125 kW standby (163.0 kVA).

What engine does the Kohler 125REOZJ4 use?

The Kohler 125REOZJ4 is powered by the John Deere 6068HFG08 engine.

What fuel does the Kohler 125REOZJ4 use?

The Kohler 125REOZJ4 runs on Diesel.

What is the oil capacity of the Kohler 125REOZJ4?

The John Deere 6068HFG08 engine in the Kohler 125REOZJ4 has an oil capacity of 15.6 liters.

What alternator does the Kohler 125REOZJ4 use?

The Kohler 125REOZJ4 uses a Kohler 4R13X alternator.

Parts

4
Part #DescriptionQtySystem
GM90735Air Cleaner1Air filter Amazon eBay PartsGeek
GM91358Element, Air Cleaner1Air filter Amazon eBay PartsGeek
GM91647Hose, Hump1Hose PartsGeek
GM92823Element, Air Cleaner Safety1Air filter Amazon eBay PartsGeek

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
Prime25%10.62.8
Prime50%17.84.7
Prime75%25.06.6
Prime100%32.58.6
Standby25%11.33.0
Standby50%19.35.1
Standby75%27.27.2
Standby100%34.09.4

Available documents

Brochure — GSA Product List (Kohler)Spec sheet — Kohler-125REOZJ4 (Kohler)Spec sheet — g5429 (Kohler)Reference — FinalGSAPriceListEffective 3-20-2023 (Kohler)Reference — GSAPriceList (Kohler)Parts manual — tp6894 (Kohler)Wiring diagram — tp6924 (Kohler)

Other sets with this engine