Maintenance schedule
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Oil filter | Full flow, cartridge | — | |||
| Oil | Gear | 4.55 qts. | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
The Generac 3.9 GN is a 3.9 L 6-cylinder naturally aspirated engine rated at 1800 rpm. It powers generator sets from Generac, including the 3.9GN and Home Standby - 40. It holds 4.55 L (1.2 gal) of oil and 5.6 L (1.5 gal) of coolant.
Also known as: GENERAC 3.9 GN
| Oil capacity | 4.55 L |
|---|---|
| Coolant capacity | 5.6 L |
| Displacement | 3.9 L |
| Cylinders | 6 |
| Aspiration | Naturally Aspirated |
| Rated speed | 1800 rpm |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Oil filter | Full flow, cartridge | — | |||
| Oil | Gear | 4.55 qts. | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
The Generac 3.9 GN engine has an oil capacity of 4.55 liters.
The Generac 3.9 GN has a displacement of 3.9 liters with 6 cylinders.
The Generac 3.9 GN powers 2 generator set(s), including Generac 3.9GN, Generac Home Standby - 40.