The Generac GT-990 is a 0.99 L 2-cylinder engine rated at 3600 rpm. It powers generator sets from Generac, including the 04390, 04760 and 04456, 04759. It holds 1.61 L (0.4 gal) of oil.
| Oil capacity | 1.61 L |
|---|---|
| Displacement | 0.992 L |
| Cylinders | 2 |
| Rated speed | 3600 rpm |