Kohler J40UM Specs (Power | Consumption)

The Kohler J40UM generator is listed with standby output of 39 kW, Diesel/HVO fuel, 60 Hz operation, 240 V output, mono-bi, rated current of 162 A, and sound level of 80.0 dBA @ [1, 7, 1, 7] m.

Kohler Generator Specifications

Generator • Diesel/HVO • 60 Hz • mono-bi

Standby power: 39 kWVoltage options: 240 VRated current: 162 ADry weight: 1,530 lb (694 kg)

Key specifications

39 kW Standby power

Diesel/HVO Fuel

240 V Voltage options

mono-bi Phase

162 A Rated current

1,530 lb (694 kg) Dry weight

80.0 dBA @ [1, 7, 1, 7] m Sound level

60 Hz Frequency

Useful generator charts

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

Estimated fuel consumption by load

Estimated from comparable Kohler diesel models; not a manufacturer-rated curve.

25% load

1.14 gal/hr

50% load

1.98 gal/hr

75% load

2.8 gal/hr

100% load

3.66 gal/hr

Estimated runtime by load

Calculated from the listed 26.4 gal fuel capacity and estimated fuel-consumption data.

25% load

23.2 hr

50% load

13.3 hr

75% load

9.4 hr

100% load

7.2 hr

Power-to-weight

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

This model

25.5 kW

Peer average

24.9 kW

57th percentile

Power output

Low 35 kW High 39 kW

Standby

39 kW

Prime

35 kW

How the Kohler J40UM compares

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

Standby power

39 kW

5% below avg

41st percentile

Rated current

162 A

8% above avg

53rd percentile

Dry weight

1,530 lb

23% below avg

30th percentile

Sound level

80 dBA

21% above avg

98th percentile

Standby power39 kW

Low 30 kWAverage 41.1 kWHigh 55 kW

About 5% below the similar-output Kohler average. Around the 41st percentile for this field.

Rated current162 A

Low 43 AAverage 149 AHigh 221 A

About 8% above the similar-output Kohler average. Around the 53rd percentile for this field.

Dry weight1,530 lb

Low 657 lbAverage 1,994 lbHigh 4,385 lb

About 23% below the similar-output Kohler average. Around the 30th percentile for this field.

Sound level80 dBA

Low 57 dBAAverage 66.3 dBAHigh 76.6 dBA

About 21% above the similar-output Kohler average. Around the 98th percentile for this field.

This model Peer average

Generator information

Manufacturer	Kohler
Model	J40UM
Generator type	Generator
Fuel	Diesel/HVO
Frequency	60 Hz

Electrical output

Standby power	39 kW
Prime power	35 kW
Standby kVA	39.0
Voltage options	240 V
Phase	mono-bi
Rated current	162 A

Engine, cooling and controls

Engine model	John Deere 3029TSG20*
Engine displacement	178 cu in (2.91 L)
Aspiration / cooling	turbo
Rated engine speed	1800 rpm
Controller	APM303, APM403
Alternator	KH00810T (4-pole, Class H insulation)

Physical specifications

Dry weight	1, 530 lb (694 kg)
Dimensions (L × W × H)	66.9 × 35.3 × 48.9 in (1700 × 896 × 1243 mm)
Sound level	80.0 dBA @ [1, 7, 1, 7] m

Battery

Battery voltage	12 V

Fuel system and runtime

Fuel tank	26.4 gal (100 L)

Maintenance and service parts

Engine oil	Capacity: 6.0 l
Fuel filter	Part number: 336661
Air filter	Part number: 002175339000
Coolant	Capacity: 16.1 l

Estimated fuel consumption

25% load	1.14 gal/hr (4.3 L/hr)
50% load	1.98 gal/hr (7.5 L/hr)
75% load	2.8 gal/hr (10.6 L/hr)
100% load	3.66 gal/hr (13.9 L/hr)

Estimated from comparable Kohler diesel generator curves using rated output, engine displacement, engine speed and aspiration where available. These are not manufacturer-rated values.

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