Service parts for the 21EKOZD
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredOil system
1 requiredBelts
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 21 kW |
| Standby kVA | 21 |
| Prime power | 21 kW |
| Emissions | Tier III |
| Controller | Decision-Maker 3500 |
| Oil capacity | 11.0 L |
| Alternator | 4E4.2 (Class H insulation) |
| Voltage options | 120 V, 120/240 V |
| Phase | 1 |
| Rated current | 175 A |
| Battery cranking | 650 CCA |
| Battery voltage | 12 or 24 volt V |
| Coolant capacity | 4.4 L |
| Max ambient | 25 °C |
| Dimensions (L×W×H) | 1197×652×711 mm |
| Dry weight | 422 kg |
| Wet weight | 480 kg |
Maintenance & consumables
for the Caterpillar C3.6| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | with precleaner, automatic dust ejection and underhood intake | — | |||
| Fuel filter | Fuel Filter Element | ED0021753200-S | Amazon $68.80 eBay $17.99 FridayParts $68.86 | ||
| Oil filter | Oil Filter | ED0021752800-S | Amazon $21.95 eBay $22.90 FridayParts $19.99 | ||
| Battery | heavy duty, maintenance free, 1000 CCA | — | |||
| Belt | V-Belt (Seawater Pump) | GM90645 | Amazon eBay $30.30 | ||
| Spark plug | — |
Common questions
How many kW is the Kohler 21EKOZD?
The Kohler 21EKOZD is rated 21 kW standby (21.0 kVA).
Which engine powers the Kohler 21EKOZD?
The Kohler 21EKOZD is powered by the Caterpillar C3.6 engine.
What kind of fuel does the Kohler 21EKOZD run on?
The Kohler 21EKOZD runs on diesel.
What alternator comes on the Kohler 21EKOZD?
The Kohler 21EKOZD uses a 4E4.2 alternator. Insulation class H.
What oil filter does the Kohler 21EKOZD use?
The Kohler 21EKOZD uses oil filter part number ED0021752800-S.
What fuel filter does the Kohler 21EKOZD use?
The Kohler 21EKOZD uses fuel filter part number ED0021753200-S.
Troubleshooting
1Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Accidental starting | Disconnect 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
25Service, 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
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| 25% | 2.3 | 0.61 | |
| 50% | 3.7 | 0.98 | |
| 75% | 5.2 | 1.39 | |
| 100% | 6.7 | 1.77 | |
| Prime | 25% | 2.3 | 0.61 |
| Prime | 50% | 3.7 | 0.98 |
| Prime | 75% | 5.2 | 1.39 |
| Prime | 100% | 6.7 | 1.77 |
| Standby | 25% | 2.3 | 0.61 |
| Standby | 50% | 3.7 | 0.98 |
| Standby | 75% | 5.2 | 1.39 |
| Standby | 100% | 6.7 | 1.77 |