The Isuzu BH-4HK1X is a 5.19 L engine rated at 1500 rpm. It powers generator sets from Airman, including the SDG125AS, SDG125S-1B1, SDG125S-7B1 and SDG150AS. It holds 17 L (4.5 gal) of oil and 20.5 L (5.4 gal) of coolant.
| Oil capacity | 17.0 L |
|---|---|
| Coolant capacity | 20.5 L |
| Displacement | 5.193 L |
| Rated speed | 1500 rpm |