Kohler 20.5EFKOZD Generator Set
The Kohler 20.5EFKOZD is a 20.5 kW (20.5 kVA) Diesel standby generator set. It is available at 230 V and 240 V, 1-phase, 50 Hz and rated 90 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 1197×652.5×711 mm (47.1×25.7×28.0 in) and weighs about 489 kg (1078 lb).
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Specifications
| Fuel | Diesel |
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| Frequency | 50.0 Hz |
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| Standby power | 20 kW |
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| Standby kVA | 20 |
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| Prime power | 21 kW |
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Full specifications
| Voltage options | 230 V, 240 V |
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| Phase | 1 |
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| Rated current | 90 A |
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| Battery cranking | 650 CCA |
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| Battery voltage | 12 or 24 volt V |
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| Coolant capacity | 4.4 L |
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| Max ambient | 25 °C |
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| Dimensions (L×W×H) | 1197×652×711 mm |
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| Dry weight | 489 kg |
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Filters & service parts (model family)
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.
| Item | Spec | Capacity | Part # | Interval |
|---|
| Belt | | | 229125 buy | |
| Belt | | | 256503 buy | |
| Belt | | | 276148 buy | |
| Belt | | | GM102586 buy | |
| Belt | | | GM15402 buy | |
| Belt | | | GM53040 buy | |
| Belt | | | GM88686 buy | |
| Belt | | | GM98801 buy | |
| Fuel filter | SECONDARY FUEL | | 267987 buy | |
| Fuel filter | | | ED0021750050-S buy | |
| Fuel filter | SECONDARY FUEL | | ED0021752880-S buy | |
| Fuel filter | | | ED0021753180-S buy | |
| Fuel filter | | | ED0021753200-S buy | |
| Fuel filter | SECONDARY FUEL | | GM32359 buy | |
| Fuel filter | PRIMARY FUEL | | GM41014 buy | |
| Fuel filter | PRIMARY FUEL | | GM48727 buy | |
| Fuel filter | SECONDARY FUEL | | GM48728 buy | |
| Fuel filter | PRIMARY FUEL | | GM48729 buy | |
| Fuel filter | SECONDARY FUEL | | GM48730 buy | |
| Fuel filter | PRIMARY/SECONDARY | | GM50263 buy | |
| Fuel filter | PRIMARY/SECONDARY | | GM91974 buy | |
| Oil filter | | | 359771 buy | |
| Oil filter | | | 52 050 02-S buy | |
| Oil filter | | | ED0021752800-S buy | |
| Oil filter | | | ED0021752850-S buy | |
| Oil filter | | | ED0021753090-S buy | |
| Oil filter | | | GM32809 buy | |
| Oil filter | | | GM47465 buy | |
| Oil filter | | | GM48731 buy | |
| Spark plug | | | 25 132 16 S buy | |
| Spark plug | | | GM46180 (2) buy | |
Available documents
BrochureSpec sheetParts manual