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Kohler 18EFKOZD Generator Set

The Kohler 18EFKOZD is a 18 kW (18 kVA) diesel standby generator set. It is available at 230 V and 240 V, single-phase, 50 Hz and rated 79 A. It holds about 11 L (2.9 gal) of oil and 4.4 L (1.2 gal) of coolant, with a maximum ambient rating of 25 °C. Starting uses battery rated 650 CCA at 12 V. The set measures 1121×577.5×694 mm (44.1×22.7×27.3 in) and weighs about 422 kg (930 lb).

18 kW
Standby
11.0 L
Oil capacity
3
Document types

How to read your Kohler serial & model number →

Typical fuel consumption for 15–20 kW Diesel generators →

Compare with other 15–20 kW Diesel generators →

Service parts for the 18EFKOZD

Grouped by system, with how many of each the parts manual calls for.

Fuel system

1 required

Oil system

1 required

Belts

1 required

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

Fueldiesel
Frequency50.0 Hz
Standby power18 kW
Standby kVA18
Prime power18 kW
ControllerDecision-Maker 3500
Oil capacity11.0 L
Alternator4E4.2 (Class H insulation)
Voltage options230 V, 240 V
Phase1
Rated current79 A
Battery cranking650 CCA
Battery voltage12 or 24 volt V
Coolant capacity4.4 L
Max ambient25 °C
Dimensions (L×W×H)1121×577×694 mm
Dry weight422 kg

Maintenance & consumables

ItemSpecCapacityPart #Interval
Fuel filterFuel Filter ElementED0021753200-S Amazon $68.80 eBay $17.99 FridayParts $68.86
Oil filterOil FilterED0021752800-S Amazon $21.95 eBay $22.90 FridayParts $19.99
BeltV-Belt (Seawater Pump)GM90645 Amazon eBay $30.30

Common questions

What size generator is the Kohler 18EFKOZD?

The Kohler 18EFKOZD is rated 18 kW standby (18.0 kVA).

What kind of fuel does the Kohler 18EFKOZD run on?

The Kohler 18EFKOZD runs on diesel.

Which alternator is fitted to the Kohler 18EFKOZD?

The Kohler 18EFKOZD uses a 4E4.2 alternator. Insulation class H.

What oil filter fits the Kohler 18EFKOZD?

The Kohler 18EFKOZD uses oil filter part number ED0021752800-S.

What fuel filter does the Kohler 18EFKOZD use?

The Kohler 18EFKOZD uses fuel filter part number ED0021753200-S.

Troubleshooting

1

Symptoms & remedies

SymptomRemedy
Accidental startingDisconnect the battery cables before working on the generator set. Remove the negative (--) lead first when disconnecting the battery. Reconnect the negative (--) lead last when reconnecting the battery.

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

Parts

5
Part #DescriptionQtySystem
229826Seawater Pump Impeller Kit4Impeller Amazon $27.95 eBay $45.71 FridayParts $33.59
ED0021752800-SOil FilterOil filter Amazon $21.95 eBay $22.90 FridayParts $19.99
ED0021753200-SFuel Filter ElementFuel filter Amazon $68.80 eBay $17.99 FridayParts $68.86
GM90645V-Belt (Seawater Pump)Belt Amazon eBay $30.30
ED0090802840-SZinc Anode4Service part / kit Amazon eBay $92.76

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%2.30.61
50%3.70.98
75%5.21.39
100%6.71.77
Standby25%2.30.61
Standby50%3.70.98
Standby75%5.21.39
Standby100%6.71.77

Available documents

Spec sheet (Kohler)Spec sheet — g2189 (Kohler)Operator's manual (Kohler)Parts manual — 2017-Sea-Spares-Brochure-g12202 (Kohler)Parts manual — G12-202-11-20-Sea-Spares-Kits-brochure (Kohler)
Full service, cheapest listings

Priced items from this model's own parts manual.

Fuel filter ED0021753200-S$17.99
Oil filter ED0021752800-S$21.95
Belt GM90645$30.30
3 priced items$70.24