Doosan portable power uses Mitsubishi engines type L3E, S4Q2 and S4S in light towers and generators. Parts and engines for these applications are on stock at DET.
| Type | Engine brand | Type | Remarks | |
| Light Tower | L20 | Mitsubishi | S4Q2 | |
| Light Tower | LSC | Mitsubishi | L3E-W461DPP | Tier 4 Final |
| Generator | G20 | Mitsubishi | S4Q2-Z361SD | |
| Generator | G25WMI | Mitsubishi | S4Q2-Y362IR | Mobile |
| Generator | G30 | Mitsubishi | S4S-Z2DT61IR | |
| Generator | G40 | Mitsubishi | S4S-Z3DT61SD | |
| Generator | G40WMI | Mitsubishi | S4S-Y362IR | Mobile |
