The D905BG is a 0.9 L 3-cylinder engine rated at 1800 rpm, producing up to 8.9 kW. It powers generator sets from Simson Maxwell, including the KS series. It holds 5.1 L (1.3 gal) of oil.
| Oil capacity | 5.1 L |
|---|---|
| Displacement | 0.898 L |
| Cylinders | 3 |
| Rated speed | 1800 rpm |
| Gross power | 8 kW |