The Cummins/Onan G8.3GC is a 8.3 L engine. It powers generator sets from Cummins/Onan, including the C70N6C.
Also known as: Cummins G8.3GC
Part of the Cummins/Onan G8.3 engine family — 2 variants share parts & fitment.
| Displacement | 8.3 L |
|---|
How to read your Cummins/Onan engine serial & model number →
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Oil filter | One spin-on canister-combination full flow with bypass | — | |||
| Battery | 550 CCA (cold soak at -18 °C (0 °F) or above) | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Pressure | Silencer Back Pressure (Factory Enclosed Units Only) | 12.7 | mm Hg | Factory enclosed units only |
| Pressure | Total System Back Pressure Allowed | 51 | mm Hg | |
| Speed | Overspeed Limit | 2100 | rpm | |
| Speed | Random Frequency Variation | ±0.5 | % | |
| Voltage | Random Voltage Variation | ±1 | % | Three-phase only |
| Voltage | Voltage Regulation, No Load to Full Load | ±1 | % |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Fuel | NG | Fuel inlet pressure at GenSet connection: 356 to 508 mm WC (14 to 20 in. WC) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Part # | Description | Category |
|---|---|---|
| 3163196 | torque wrench adapter | Adapter |
| 05e00014 | Air Cleaner Element, Paper Type | Air filter |
| 17900012 | Drive Belt, Cooling Fan | Belt |
| 3163099 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt |
| 3163292 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt |
| 3164204 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt |
| 3164486 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt |
| 3164488 | Digital Multimeter Measure voltage on electrical equipment | Belt |
| 3164491 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt |
| 3164498 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt |
| 3376589 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt |
| 3822524 | Use on v-belts ( 3/8 to 7/8) and v-ribbed belts with 5 ribs or less. | Belt |
| 3822525 | Use on v-beits larger than 7/8 in. and v-ribbed belts with 6 or more ribs. | Belt |
| 3823921 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt |
| 3823983 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt |
| 3824876 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt |
| oi900sb | Cooling Fan Belt Tensioner | Belt |
| 08900241 | Coolant Filter | Filter |
| 05200007 | Fuel Filter, NG | Fuel filter |
| 08900244 | Gasket, Low-Temperature Aftercooler (LTA) Water Pump | Gasket |
| 05600009 | Radiator Hoses | Hose |
| Q5e00009 | Radiator Hoses | Hose |
| 08900245 | Rubber Impeller Cap, Low-Temperature Aftercooler (LTA) Water Pump | Impeller |
| 9800wa | Sealing O-Ring, Air/Fuel Mixer | O ring |
| 3375049 | Oil Filter Wrench | Oil filter |
| 0500007 | filter cover | Service part / kit |
| 3376592 | Inch Pound Torque Wrench | Service part / kit |
| 3822735 | Plastic bead blasting media | Service part / kit |
| 3824510 | Cummins electronic cleaner | Service part / kit |
| oj900sb | Crankcase Breather Tube | Service part / kit |
| 08900217 | Low-Temperature Aftercooler (LTA) Water Pump | Pump |
| 08900239 | Low-Temperature Aftercooler (LTA) Water Pump | Pump |
| 13400046 | Spark Plug | Spark plug |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Cummins/Onan G8.3GC has a displacement of 8.3 liters.
The Cummins/Onan G8.3GC powers 1 generator set(s), including Cummins/Onan C70N6C.