The Yanmar 3TNM72-DRE is a 0.9 L 4-cylinder water-cooled engine rated at 3000 rpm. It powers generator sets from Yanmar, including the SA221. It holds 2.8 L (0.7 gal) of oil.
| Oil capacity | 2.8 L |
|---|---|
| Displacement | 0.903 L |
| Cylinders | 4 |
| Aspiration | water-cooled |
| Rated speed | 3000 rpm |