Home » Appliances » Kohler 40EFOZ Specs (Power | Consumption)

Kohler 40EFOZ Specs (Power | Consumption)

Written by Ernie Lo in Specs Last Updated August 18, 2026

The Kohler 40EFOZ generator is listed with standby output of 40 kW, Diesel fuel, 50 Hz operation, 7 available voltage configurations, Three phase, and rated current of 152 A.

Kohler Generator Specifications

Generator • Diesel • 50 Hz • Three phase

Standby power: 40 kWVoltage options: 7 configurationsRated current: 152 ADry weight: 2,079 lb (943 kg)

Key specifications

40 kW Standby power
Diesel Fuel
7 configurations Voltage options
Three phase Phase
152 A Rated current
2,079 lb (943 kg) Dry weight
50 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

1.3 gal/hr

50% load

2.4 gal/hr

75% load

3.4 gal/hr

100% load

4.4 gal/hr

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

19.2 kW

Peer average

24.9 kW

26th percentile
Power output
Low 40 kW High 40 kW
Standby

40 kW

Prime

40 kW

Model spec snapshot
Representative numeric specifications from this generator.
40 kWStandby
152 ACurrent
2,078.96 lbWeight

How the Kohler 40EFOZ 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
Rated current
152 A
In line with avg
42nd percentile
Dry weight
2,079 lb
4% above avg
66th percentile
Oil capacity
3.7 gal
47% above avg
84th 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.

Rated current152 A
Low 43 AAverage 149 AHigh 221 A

Very close to the similar-output Kohler average. Around the 42nd percentile for this field.

Dry weight2,079 lb
Low 657 lbAverage 1,994 lbHigh 4,385 lb

About 4% above the similar-output Kohler average. Around the 66th percentile for this field.

Oil capacity3.7 gal
Low 1.09 galAverage 2.52 galHigh 4.12 gal

About 47% above the similar-output Kohler average. Around the 84th percentile for this field.

This model Peer average

Generator information

Manufacturer Kohler
Model 40EFOZ
Generator type Generator
Fuel Diesel
Frequency 50 Hz

Electrical output

Standby power 40 kW
Prime power 40 kW
Voltage options 110/190 V, 110/220 V, 115/230 V, 120/208 V, 220/380 V, 230/400 V, 240/416 V
Phase Three phase
Rated current 152 A

Engine, cooling and controls

Oil capacity 3.7 gal (14 L)
Coolant capacity 3.7 gal (14 L)
Controller Decision-Maker, Decision-Maker 3+, Decision-Maker 3500, KOHLER-built microprocessor controls
Alternator Kohler 4P8X
Emissions Tier II

Physical specifications

Dry weight 2, 079 lb (943 kg)
Dimensions (L × W × H) 61 × 29.1 × 37.8 in (1549 × 738 × 961 mm)

Battery

Battery cranking 625 CCA
Battery voltage 12 V

Fuel consumption

Prime 1.3 gal/h (4.9 L/h) @ 25%; 2.4 gal/h (9.1 L/h) @ 50%; 3.4 gal/h (12.9 L/h) @ 75%; 4.4 gal/h (16.7 L/h) @ 100%

Maintenance and service parts

Oil filter Part number: GM32809
Fuel filter Part number: GM48727 | GM48728; Specification: Primary | Secondary
Air filter Part number: 226915
Belt Part number: GM15402; Specification: Alternator and Seawater Pump

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

Related posts:

  1. Kohler G6 Specs (Power | Consumption)
  2. Kohler 7ER Specs (Power | Consumption)
  3. Kohler 125ERESB-QS Specs (Power | Consumption)
  4. Kohler 80ERESD-QS Specs (Power | Consumption)

Ernie Lo

Ernie Lo is a qualified web designer and web developer. He works as an IT support technician and website manager at Benleigh Vending, and he also fixes vending machines.

Recent Posts