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Kohler 80REOZJ4 Generator Set

The Kohler 80REOZJ4 is a 80 kW (106 kVA) Diesel standby generator set powered by a John Deere 4045HFG04 engine. It is available at 120/208 V, 120/240 V, 277/480 V and 347/600 V, 3-phase, 60 Hz and rated 127 A. It holds about 21 L (5.5 gal) of oil and 26.1 L (6.9 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 1 battery rated 450 CCA at 12 V. The set measures 2951×1119×2156 mm (116.2×44.1×84.9 in), weighs about 2542 kg (5604 lb) and produces 71 dBA at 7 m. An integrated tank holds 727 L (192.1 gal), roughly 24 hours of runtime.

80 kW
Standby
4.5 L
Displacement
21.0 L
Oil capacity
5
Document types

How to read your Kohler serial & model number →

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power80 kW
Standby kVA106
Prime power76 kW
EmissionsTier 4 Final
ControllerDecision-Maker 3500
Oil capacity21.0 L
AlternatorKohler 4R9X
Voltage options120/208 V, 120/240 V, 277/480 V, 347/600 V
Phase3
Rated current127 A
Power factor0.8
Circuit breaker400 A
Battery cranking450 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity26.1 L
Max ambient50 °C
Dimensions (L×W×H)2951×1119×2156 mm
Dry weight2542 kg
Sound level69.0 dBA @ 7 m
Fuel tank727.0 L
Tank runtime24 hr

Engine

John Deere 4045HFG04
Oil capacity21.0 L
Coolant capacity26.1 L
Displacement4.5 L
AspirationTurbocharged Charge Air Cooled
Rated speed1800 rpm

Maintenance & consumables

for the John Deere 4045HFG04
ItemSpecCapacityPart #Interval
Fuel filterPrimary find
Oil filterCartridge×1 find

Compatible filters for the John Deere 4045HFG04 — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.

  • Fuel filter (primary): Kohler GM50006 Kohler 336661 Kohler GM48727 Kohler GM50074 John Deere AT274723
  • Oil filter: Kohler GM32809 Kohler 360031 John Deere RE519987 John Deere MIU800650 John Deere DZ118286

Common questions

What is the power rating of the Kohler 80REOZJ4?

The Kohler 80REOZJ4 is rated 80 kW standby (106.0 kVA).

What engine does the Kohler 80REOZJ4 use?

The Kohler 80REOZJ4 is powered by the John Deere 4045HFG04 engine.

What fuel does the Kohler 80REOZJ4 use?

The Kohler 80REOZJ4 runs on Diesel.

What is the oil capacity of the Kohler 80REOZJ4?

The John Deere 4045HFG04 engine in the Kohler 80REOZJ4 has an oil capacity of 21.0 liters.

What alternator does the Kohler 80REOZJ4 use?

The Kohler 80REOZJ4 uses a Kohler 4R9X alternator.

Parts

7
Part #DescriptionQtySystem
GM100703Element, Primary1Air filter Amazon eBay PartsGeek
GM100704Element, Safety1Air filter Amazon eBay PartsGeek
GM62396Hose, Reducer1Hose PartsGeek
GM94203Heavy Duty Air Cleaner1Air filter Amazon eBay PartsGeek
80REOZJ4Stationary non-emergency gen-setsService part / kit PartsGeek
B4-41/1000Service part / kit PartsGeek
B4-41/750Service part / kit 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%7.01.0
Prime50%11.73.1
Prime75%16.64.4
Prime100%22.15.8
Standby25%7.41.9
Standby50%12.73.4
Standby75%18.24.8
Standby100%24.46.4

Available documents

Brochure — GSA Product List (Kohler)Spec sheet (Kohler)Spec sheet — Kohler-80REOZJ4 (Kohler)Spec sheet — g5427 (Kohler)Reference — FinalGSAPriceListEffective 3-20-2023 (Kohler)Reference — GSAPriceList (Kohler)Reference — KOHLERParts manual — tp6894 (Kohler)Wiring diagram — tp6924 (Kohler)

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