Specifications
| Standby power | 136 kW |
|---|---|
| Standby kVA | 147 |
| Prime power | 109 kW |
| Oil capacity | 16.4 L |
| Coolant capacity | 22.1 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 1723×896×1380 mm |
| Dry weight | 718 kg |
Maintenance & consumables
for the Cummins/Onan 6B5.9| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | Recommended fuel filter - primary, secondary | — | find | ||
| Oil filter | Recommended lube oil filter | — | find | ||
| Belt | Battery cable size - minimum of 2/0 AWG and maximum cable length not to exceed 6 ft. (1.5 m) | — | find | ||
| Oil | Oil capacity of pan (high - low) | 15.0 qt | — |
Common questions
What is the power rating of the Cummins/Onan 6BTAA5.9-G7?
The Cummins/Onan 6BTAA5.9-G7 is rated 136 kW standby (147.0 kVA).
What engine does the Cummins/Onan 6BTAA5.9-G7 use?
The Cummins/Onan 6BTAA5.9-G7 is powered by the Cummins/Onan 6B5.9 engine.
Parts
18| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 3288689 | Belt | As needed | Belt | PartsGeek |
| 3971603 | Starter 12V | As needed | Starter | PartsGeek |
| 4988274 | Alternator | As needed | Alternator | PartsGeek FridayParts $145.60 |
| FS1251/FF42000 | Fuel Filter | 1 | Fuel filter | PartsGeek |
| LF3959 | Lube Filter | 1 | Lube filter | Amazon eBay $29.95 PartsGeek |
| RU5045 | Air Cleaner | 1 | Air filter | PartsGeek |
| V70509 | Lube Oil | 4 Gal. | Fluid | PartsGeek |
| 12.001-3678-000 | Lubricating Oil Pressure Gauge | 1 | Service part / kit | PartsGeek |
| 13.001-3901-000 | Battery A/B Switch | 1 | Service part / kit | PartsGeek |
| 14.001-3912-000 | ON/OFF Switch (AUTO/MANUAL) | 1 | Service part / kit | PartsGeek |
| 3305062 | Heater, 240V | As needed | Service part / kit | PartsGeek |
| 3315032 | Heater, 120V | As needed | Service part / kit | PartsGeek |
| 3885910 | Red Paint, Spray can | 3 | Service part / kit | PartsGeek |
| 5.001-2674-000 | True Warning Light | 1 | Service part / kit | PartsGeek |
| 6.001-3789-000 | Low Oil Pressure Warning Light | 1 | Service part / kit | PartsGeek |
| 7.001-3890-000 | Circuit Breaker | 1 | Service part / kit | PartsGeek |
| 8210G003-12VDC | 3/4" 12V solenoid | As needed | Service part / kit | PartsGeek |
| 8210G3-24VDC | 3/4" 24V solenoid | As needed | 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.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Base | 100% | 16.0 | 4.3 |
| Continuous | 100% | 26.0 | 6.9 |
| Prime | 25% | 7.0 | 1.9 |
| Prime | 50% | 16.0 | 4.3 |
| Prime | 75% | 26.0 | 6.9 |
| Prime | 100% | 37.0 | 9.8 |
| Standby | 25% | 9.0 | 2.5 |
| Standby | 50% | 19.0 | 5.0 |
| Standby | 75% | 29.0 | 7.5 |
| Standby | 100% | 41.0 | 10.9 |
Available documents
Spec sheet — 0070818 (Cummins/Onan)Spec sheet — 6BTAA5.9G7 (Cummins/Onan)