The Honda GX390 is a 0.39 L unleaded engine rated at 3600 rpm, producing up to 6 kW. It powers generator sets from Cummins/Onan and SDMO, including the 5GRBA 378A, 7GRBB 377A, HX 6000 UK and HX 6080. It holds 1.16 L (0.3 gal) of oil.
| Oil capacity | 1.16 L |
|---|---|
| Displacement | 0.389 L |
| Aspiration | unleaded |
| Rated speed | 3600 rpm |
| Gross power | 6 kW |
Shared across brands: Cummins/Onan, SDMO
Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
The Honda GX390 engine has an oil capacity of 1.16 liters.
The Honda GX390 has a displacement of 0.389 liters.
The Honda GX390 powers 5 generator set(s), including Cummins/Onan 5GRBA 378A, Cummins/Onan 7GRBB 377A, SDMO HX 6000 UK, SDMO HX 6080, SDMO HX 7500 T.