The Generac 3.9L V-6 is a 3.9 L naturally aspirated engine rated at 3600 rpm. It powers generator sets from Generac, including the QT070. It holds 3.79 L (1.0 gal) of oil and 11.36 L (3.0 gal) of coolant.
Also known as: Generac 3.9L V-6
Part of the Generac 3.9L engine family — 3 variants share parts & fitment.
| Oil capacity | 3.785 L |
|---|---|
| Coolant capacity | 11.355 L |
| Displacement | 3.9 L |
| Aspiration | Naturally Aspirated |
| Rated speed | 3600 rpm |
| Part # | Description | Category |
|---|---|---|
| 090635 | AIR CLEANER, 7-3/4 | Air filter |
| 0D58250477 | BELT, ALTERNATOR & OTHERS, 1140X2 | Belt |
| 0D58250250 | FUEL FILTER | Fuel filter |
| 0D58250251 | FUEL FILTER ASY | Fuel filter |
| 0D58250105 | GASKET KIT, ENG OVERHAUL | Gasket |
| 0D58250107 | GASKET, ROCKER COVER | Gasket |
| 0D58250112 | GASKET, CYL HEAD | Gasket |
| 0D58250121 | GASKET, CYL BLOCK FR PLATE | Gasket |
| 0D58250143 | OIL PAN, ENG | Gasket |
| 0D58250495 | GLOW PLUG | Glow plug |
| 0D58250256 | TUBE, FUEL LINE | Hose |
| 0D58250257 | TUBE, FUEL LINE | Hose |
| 0D58250448 | NOZZLE & HOLDER ASY, FUEL, INJ | Injector |
| 0D58250227 | OIL FILTER | Oil filter |
| 0D58250103 | SLEEVE & PISTON KIT (FOR ONE ENGINE) | Service part / kit |
| 0D58250139 | BEARING SET, CRKSHFT | Service part / kit |
| 0D58250211 | OIL PUMP ASY, ENG | Pump |
| 0D58250261 | PUMP ASY, INJ PUMP FUEL FEED | Pump |
| 0D58250266 | GOVERNOR ASY, INJ PUMP | Pump |
| 0D58250476 | WATER PUMP ASY | Pump |
| 0D58250127 | CAP, SEALING, D=40 | Seal |
| 0D58250142 | OIL SEAL, CRKSHFT, RR | Seal |
| 0D58250481 | THERMOSTAT KIT | Thermostat |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Generac 3.9L V-6 engine has an oil capacity of 3.785 liters.
The Generac 3.9L V-6 has a displacement of 3.9 liters.
The Generac 3.9L V-6 powers 1 generator set(s), including Generac QT070.