Generac 3.9GN Engine
The Generac 3.9GN is a 3.9 L -6-cylinder naturally aspirated engine rated at 1800 rpm. It powers generator sets from Generac, including the Home Standby - 40, SG020, SG025 and SG030. It holds 4.25 L (1.1 gal) of oil and 7.9 L (2.1 gal) of coolant.
Engine specifications
| Oil capacity | 4.25 L |
|---|---|
| Coolant capacity | 7.9 L |
| Displacement | 3.9 L |
| Cylinders | -6 |
| Aspiration | Naturally Aspirated |
| Rated speed | 1800 rpm |