Service parts for the 20.5EFKOZD
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 | 50.0 Hz |
| Standby power | 20 kW |
| Standby kVA | 20 |
| Prime power | 20 kW |
| Controller | Decision-Maker 3500 |
| Oil capacity | 11.0 L |
| Alternator | 4D5.0 |
| Voltage options | 110/190 V, 115/230 V, 120/208 V, 230/400 V, 240/416 V, 220/380 V |
| Phase | 1 |
| Rated current | 78 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) | 1138×577×694 mm |
| Dry weight | 431 kg |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| 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 | ||
| Belt | V-Belt (Seawater Pump) | GM90645 | Amazon eBay $30.30 |
Common questions
What is the power rating of the Kohler 20.5EFKOZD?
The Kohler 20.5EFKOZD is rated 20 kW standby (20.5 kVA).
What fuel does the Kohler 20.5EFKOZD use?
The Kohler 20.5EFKOZD runs on diesel.
What alternator does the Kohler 20.5EFKOZD use?
The Kohler 20.5EFKOZD uses a 4D5.0 alternator.
What oil filter fits the Kohler 20.5EFKOZD?
The Kohler 20.5EFKOZD uses oil filter part number ED0021752800-S.
What fuel filter fits the Kohler 20.5EFKOZD?
The Kohler 20.5EFKOZD 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
5| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 229826 | Seawater Pump Impeller Kit | 4 | Impeller | Amazon $27.95 eBay $45.71 FridayParts $33.59 |
| ED0021752800-S | Oil Filter | Oil filter | Amazon $21.95 eBay $22.90 FridayParts $19.99 | |
| ED0021753200-S | Fuel Filter Element | Fuel filter | Amazon $68.80 eBay $17.99 FridayParts $68.86 | |
| GM90645 | V-Belt (Seawater Pump) | Belt | Amazon eBay $30.30 | |
| ED0090802840-S | Zinc Anode | 4 | Service 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
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| 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 |