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Kohler KG125 Generator Set

The Kohler KG125 is a 125 kW (150 kVA) L.P./N.G. standby generator set powered by a Kohler KG6208THD 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, 3-phase, 60 Hz and rated 417 A. It holds about 9 L (2.4 gal) of oil and 28.4 L (7.5 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses 1 battery rated 650 CCA at 12 V. The set measures 2800×1120×1528 mm (110.2×44.1×60.2 in).

125 kW
Standby
6.2 L
Displacement
9.0 L
Oil capacity
6
Document types

How to read your Kohler serial & model number →

Specifications

FuelL.P./N.G.
Frequency60.0 Hz
Standby power125 kW
Standby kVA150
EmissionsEPA-Certified for 60 Hz Stationary Emergency Applications
ControllerAPM402
Oil capacity9.0 L
AlternatorKohler 4R12X
Voltage options120/208 V, 127/220 V, 120/240 V, 139/240 V, 220/380 V, 277/480 V, 347/600 V
Phase3
Rated current417 A
Power factor0.8
Battery cranking650 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity28.4 L
Max ambient50 °C
Dimensions (L×W×H)2800×1120×1528 mm

Engine

Kohler KG6208THD
Oil capacity9.0 L
Coolant capacity28.4 L
Displacement6.2 L
AspirationTurbocharged, Aftercooled
Rated speed1800 rpm

Maintenance & consumables

for the Kohler KG6208THD
ItemSpecCapacityPart #Interval
Oil filterCartridge×1 find
Oil9.0 L

Common questions

What is the power rating of the Kohler KG125?

The Kohler KG125 is rated 125 kW standby (150.0 kVA).

What engine does the Kohler KG125 use?

The Kohler KG125 is powered by the Kohler KG6208THD engine.

What fuel does the Kohler KG125 use?

The Kohler KG125 runs on L.P./N.G..

What is the oil capacity of the Kohler KG125?

The Kohler KG6208THD engine in the Kohler KG125 has an oil capacity of 9.0 liters.

What alternator does the Kohler KG125 use?

The Kohler KG125 uses a Kohler 4R12X alternator.

Parts

3model family
Part #DescriptionQtySystem
343302Gas Filter Element1Service part / kit PartsGeek
ADV-9052D-DService part / kit PartsGeek
ADV-9116D-EService part / kit PartsGeek

Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
Prime
Standby
Standby
Standby25%
Standby50%
Standby75%
Standby100%

Available documents

Brochure — g6159 (Kohler)Spec sheet — g4289 (Kohler)Reference — FinalGSAPriceListEffective 3-20-2023 (Kohler)Reference — GSAPriceList (Kohler)Parts manual — tp7098 (Kohler)Parts manual — tp7118 (Kohler)Service manual — PDF-202312 US Kohler Tp7173 en-US (Kohler)Wiring diagram — tp7112 (Kohler)

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