HomeKohlerKohler 40REOZK

Kohler 40REOZK Generator Set

The Kohler 40REOZK is a 42 kW (52 kVA) Diesel standby generator set powered by a Kohler KDI 3404TM engine. It is available at 120/208 V, 127/220 V, 120/240 V, 139/240 V, 220/380 V, 277/480 V and 347/600 V, 60 Hz. It holds about 15.6 L (4.1 gal) of oil and 12.3 L (3.2 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 1 battery rated 650 CCA at 12 V. The set measures 2300×1040×1131 mm (90.6×40.9×44.5 in) and weighs about 787 kg (1735 lb).

42 kW
Standby
3.4 L
Displacement
15.6 L
Oil capacity
4
Document types

How to read your Kohler serial & model number →

Specifications

FuelDiesel
Frequency60.0 Hz
Standby power42 kW
Standby kVA52
Prime power37 kW
EmissionsTier 3
ControllerDecision-Maker 3000
Oil capacity15.6 L
Voltage options120/208 V, 127/220 V, 120/240 V, 139/240 V, 220/380 V, 277/480 V, 347/600 V
Battery cranking650 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity12.3 L
Max ambient50 °C
Dimensions (L×W×H)2300×1040×1131 mm
Dry weight787 kg

Engine

Kohler KDI 3404TM
Oil capacity15.6 L
Coolant capacity12.3 L
Displacement3.4 L
AspirationTurbocharged
Rated speed1800 rpm

Maintenance & consumables

for the Kohler KDI 3404TM
ItemSpecCapacityPart #Interval
Air filterDry5000 hr find
Fuel filterFuel filter and prefilter cartridge replacement (250, 500)1000 hr find
Oil filterEngine oil and oil filter cartridge replacement (250, 500)×1500 hr find
BeltAlternator belt (8) (6) (7), Check Poly-V alternator belt (3.2.2)1500 hr find
CoolantCoolant level (8) (9), Check coolant level (3.2.2)1000 hr
OilEngine oil level (8)15.6 L250 hr

Common questions

What is the power rating of the Kohler 40REOZK?

The Kohler 40REOZK is rated 42 kW standby (52.0 kVA).

What engine does the Kohler 40REOZK use?

The Kohler 40REOZK is powered by the Kohler KDI 3404TM engine.

What fuel does the Kohler 40REOZK use?

The Kohler 40REOZK runs on Diesel.

What is the oil capacity of the Kohler 40REOZK?

The Kohler KDI 3404TM engine in the Kohler 40REOZK has an oil capacity of 15.6 liters.

Parts

5
Part #DescriptionQtySystem
F-44kerosene, NATO designationFuel PartsGeek
F-63kerosene, NATO designation, equivalent to F-34/F-35 with additivesFuel PartsGeek
ED0010101730-SCamshaftService part / kit PartsGeek
ED0010101820-SCamshaftService part / kit PartsGeek
ED0014603650-SSix Nicks SN8Service 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%4.91.3
Prime50%7.62.0
Prime75%10.62.8
Prime100%13.23.5
Standby25%4.91.3
Standby50%9.12.4
Standby75%11.73.1
Standby100%14.03.7

Available documents

Brochure (Kohler)Brochure — 15-60REOZK G6141 (Kohler)Brochure — G6-39 0918AZ (Kohler)Brochure — GSA Product List (Kohler)Spec sheet (Kohler)Spec sheet — G5-437 1018G (Kohler)Spec sheet — g5437 (Kohler)Reference — FinalGSAPriceListEffective 3-20-2023 (Kohler)Reference — GSAPriceList (Kohler)Wiring diagram — tp6924 (Kohler)