Kohler 40 REOZK4 Specs (Power | Consumption)

The Kohler 40 REOZK4 generator is listed with standby output of 40 kW, Diesel fuel, 60 Hz operation, 4 available voltage configurations, and sound level of 68 dBA @ 23 ft (7 m).

Kohler Generator Specifications

Generator • Diesel • 60 Hz

Standby power: 40 kWVoltage options: 4 configurationsDry weight: 3,179 lb (1,442 kg)

Key specifications

40 kW Standby power

Diesel Fuel

4 configurations Voltage options

3,179 lb (1,442 kg) Dry weight

68 dBA @ 23 ft (7 m) Sound level

60 Hz Frequency

Useful generator charts

Charts are shown only when this model has enough usable source data.

Fuel consumption by load

How fuel use changes as generator load increases.

25% load

1 gal/hr

50% load

1.7 gal/hr

75% load

2.5 gal/hr

100% load

3.3 gal/hr

Estimated runtime by load

Calculated from the listed 77.4 gal fuel capacity and fuel-consumption data.

25% load

77.4 hr

50% load

45.5 hr

75% load

31 hr

100% load

23.5 hr

Power-to-weight

Standby output per 1,000 lb of dry weight versus similar-output Kohler models.

This model

12.6 kW

Peer average

24.9 kW

12th percentile

Power output

Low 36 kW High 40 kW

Standby

40 kW

Prime

36 kW

How the Kohler 40 REOZK4 compares

This compares the supplied numeric specification with Kohler generators in the same broad standby-power class where enough comparable data exists.

Standby power

40 kW

In line with avg

50th percentile

Dry weight

3,179 lb

59% above avg

92nd percentile

Sound level

68 dBA

In line with avg

55th percentile

Oil capacity

2.96 gal

17% above avg

66th percentile

Standby power40 kW

Low 30 kWAverage 41.1 kWHigh 55 kW

Very close to the similar-output Kohler average. Around the 50th percentile for this field.

Dry weight3,179 lb

Low 657 lbAverage 1,994 lbHigh 4,385 lb

About 59% above the similar-output Kohler average. Around the 92nd percentile for this field.

Sound level68 dBA

Low 57 dBAAverage 66.3 dBAHigh 76.6 dBA

Very close to the similar-output Kohler average. Around the 55th percentile for this field.

Oil capacity2.96 gal

Low 1.09 galAverage 2.52 galHigh 4.12 gal

About 17% above the similar-output Kohler average. Around the 66th percentile for this field.

This model Peer average

Generator information

Manufacturer	Kohler
Model	40 REOZK4
Generator type	Generator
Fuel	Diesel
Frequency	60 Hz

Electrical output

Standby power	40 kW
Prime power	36 kW
Standby kVA	50.0
Voltage options	120/208 V, 120/240 V, 277/480 V, 347/600 V
Power factor	0.8
Circuit breaker	150 A

Engine, cooling and controls

Engine model	Kohler KDI 2504 TCR 2.5 L
Engine displacement	153 cu in (2.5 L)
Aspiration / cooling	Turbocharged
Rated engine speed	1800 rpm
Engine oil capacity	2.96 gal (11.2 L)
Engine coolant capacity	4.54 gal (17.2 L)
Oil capacity	2.96 gal (11.2 L)
Coolant capacity	4.54 gal (17.2 L)
Maximum ambient	122 °F (50 °C)
Controller	Decision-Maker 3500
Alternator	Kohler 4D8.3
Emissions	Tier 4 Final

Physical specifications

Dry weight	3, 179 lb (1, 442 kg)
Dimensions (L × W × H)	86.9 × 40 × 63.9 in (2206 × 1016 × 1622 mm)
Sound level	68 dBA @ 23 ft (7 m)

Battery

Battery cranking	950 CCA
Battery voltage	12 V
Battery quantity	1

Fuel system and runtime

Fuel tank	77.4 gal (293 L)
Tank runtime	24 hr

Fuel consumption

Standby	1.0 gal/h (3.8 L/h) @ 25%; 1.7 gal/h (6.6 L/h) @ 50%; 2.5 gal/h (9.5 L/h) @ 75%; 3.3 gal/h (12.6 L/h) @ 100%
Prime	0.9 gal/h (3.5 L/h) @ 25%; 1.6 gal/h (6.1 L/h) @ 50%; 2.3 gal/h (8.8 L/h) @ 75%; 3.1 gal/h (11.7 L/h) @ 100%

Maintenance and service parts

Engine oil	Specification: API CJ-4 or ACEA E6–E9; Capacity: 11.2 L
Oil filter	Specification: Cartridge; Capacity: ×1
Fuel filter	Specification: Primary 5 Microns @ 98% Efficiency
Air filter	Part number: 002175339000; Specification: Dry

Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Kohler North America generator website.