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Kohler 20RES Generator Set

The Kohler 20RES is a 20 kW (21 kVA) LPG/Natural Gas standby generator set powered by a Kohler CH1000 engine. It is available at 120/240 V, 1-phase, 60 Hz and rated 83.3 A. It holds about 1.9 L (0.5 gal) of oil. Starting uses 1 group-26 battery rated 500 CCA at 12 V. The set measures 1215×733×802 mm (47.8×28.9×31.6 in), weighs about 240 kg (529 lb) and produces 69 dBA at 7 m.

20 kW
Standby
0.999 L
Displacement
1.9 L
Oil capacity
7
Document types

How to read your Kohler serial & model number →

Specifications

FuelLPG/Natural Gas
Frequency60.0 Hz
Standby power20 kW
Standby kVA21
EmissionsEPA
ControllerDC, DC2, RDC, RDC Residential Digital, RDC2
Oil capacity1.9 L
Voltage options120/240 V
Phase1
Rated current83.3 A
Power factor1.0
Circuit breaker100 A
Battery group26
Battery cranking500 CCA
Battery voltage12 V
Battery quantity1
Dimensions (L×W×H)1215×733×802 mm
Dry weight243 kg
Sound level69.0 dBA @ 7 m

Engine

Kohler CH1000
Oil capacity2.7 L
Displacement0.999 L
AspirationAir-Cooled
Rated speed3600 rpm

Maintenance & consumables

for the Kohler CH1000
ItemSpecCapacityPart #Interval
Air filter300 hr find
Fuel filter find
Oil filter×1200 hr find
Belt find
Coolant
Coolant filter find
Oil500.0 L100 hr

Common questions

What is the power rating of the Kohler 20RES?

The Kohler 20RES is rated 20 kW standby (21.0 kVA).

What engine does the Kohler 20RES use?

The Kohler 20RES is powered by the Kohler CH1000 engine.

What fuel does the Kohler 20RES use?

The Kohler 20RES runs on LPG/Natural Gas.

What is the oil capacity of the Kohler 20RES?

The Kohler CH1000 engine in the Kohler 20RES has an oil capacity of 2.7 liters.

Troubleshooting

1

Fault codes

CodeMeaning
LossOfComm2Communication Lost with Secondary Controller

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

20
Part #DescriptionQtySystem
12 050 01-SFilter, oil8Oil filter kuduparts $32.00
24 083 09-SElement, air filter1Air filter element buy
25 132 14-SSpark plug2Spark plug buy
25 158 08-SBushing, linkage retaining4Bushing buy
25 435 06-SKit, starter solenoid1Kit buy
358358Coupling, stepper motor4Coupling buy
48 099 07-SSwitch, oil pressure1Switch buy
52 050 02-SFilter, oil8Oil filter buy
52 099 08-SSwitch, oil pressure1Switch buy
62 083 04-SElement, air filter1Air filter element buy
62 132 04-SSpark plug2Spark plug buy
GB31613529803Terminal Block, Green and Yellow1Terminal block buy
GM101737Lifting bars4Lifting bar buy
GM28823Sensor, oil temperature1Sensor buy
GM66128Fuse, 3 Amp5Fuse buy
GM66129Fuse, 7.5 Amp5Fuse buy
GM69859Terminal Block, Grey3Terminal block buy
GM69860Terminal Block, Blue1Terminal block buy
GM98597-KPTerminal Block, Green and Yellow1Terminal block buy
ADV-8424Removing the Air Intake Panel1Service part / kit buy

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
25%
50%
75%
100%
Prime100%6.4225.0
Standby25%
Standby50%
Standby75%
Standby100%

Available documents

BrochureSpec sheetInstallation manualReferenceOwner's manualParts manualService manual

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