Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 20 kW |
| Oil capacity | 8.5 L |
| Voltage options | 12 V |
| Battery voltage | 12 V |
Maintenance & consumables
for the Cummins/Onan 4A2.3| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 500 hr | find | ||
| Fuel filter | — | 1000 hr | find | ||
| Oil filter | — | 250 hr | find | ||
| Belt | — | 200 hr | find | ||
| Coolant | Change coolant every 1,000 hours or as needed. | — | 1000 hr | ||
| Coolant filter | — | find | |||
| Oil | — | 250 hr |
Common questions
What is the power rating of the Cummins/Onan 20QSA4?
The Cummins/Onan 20QSA4 is rated 20 kW standby.
What engine does the Cummins/Onan 20QSA4 use?
The Cummins/Onan 20QSA4 is powered by the Cummins/Onan 4A2.3 engine.
What fuel does the Cummins/Onan 20QSA4 use?
The Cummins/Onan 20QSA4 runs on diesel.
What is the oil capacity of the Cummins/Onan 20QSA4?
The Cummins/Onan 4A2.3 engine in the Cummins/Onan 20QSA4 has an oil capacity of 8.5 liters.
Parts
20| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 102-3456 | Drip Pan | 1 | Drip pan | PartsGeek |
| 102-7890 | Hold Down Clamps or Through Bolts (1/2 inch [13 mm]) | 2 | Hold down clamps or through bolts | PartsGeek |
| 122-0712 | Oil Filter MDL4/6 ESN 5312 5968 and Up | Oil filter | PartsGeek kuduparts $11.00 | |
| 149-1758 | Fuel Filter Element MDL3, MDL4 | Fuel filter | PartsGeek | |
| 149-2289 | Glow Plug MDL3, MDL4, MDL6 (12 Volt) | Glow plug | PartsGeek | |
| 333-0220 | Glow Plug MDL3, MDL4, MDL6 (12 Volt) | Glow plug | PartsGeek | |
| 511-0147-14 | Water Pump Belt MDL3, MDL4, MDL6 | Water pump belt | PartsGeek | |
| ES-1179-2 | FAN BELT | 1 | Belt | PartsGeek |
| FS1245 | Fuel Filter | Fuel filter | PartsGeek | |
| FS1343 | Standard Air Cleaner | Air filter | PartsGeek | |
| LS-1028-2 | DIPSTICK, OIL FILTER, AND FILL CAP (Figure 4-6) | 1 | Oil filter | PartsGeek |
| TB21 | TERMINAL BLOCK | Terminal block | PartsGeek | |
| 934-0500 | 1 | Service part / kit | PartsGeek | |
| 934-0602 | 1 | Service part / kit | PartsGeek | |
| 960-0135 | Service part / kit | PartsGeek | ||
| C-1089 | CRANKCASE BREATHER (Figure 4-7) | 1 | Service part / kit | PartsGeek |
| ES-1178-2 | BATTERY CONNECTIONS (Figure 4-4) | 1 | Service part / kit | PartsGeek |
| ES-1789-1 | 10-Light Control | Service part / kit | PartsGeek | |
| M-1753 | TYPICAL INSTALLATION | 1 | Service part / kit | PartsGeek |
| sa377 | Resonator | 1 | Service part / kit | PartsGeek |
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.
Available documents
Parts manual — 934-0257 Onan QSA Genset Parts Catalog (6-1993) (Cummins/Onan)