Unebi had two horizontal double-expansion steam engines, each driving one shaft, using steam supplied by six cylindrical boilers.
ʌnˈɛbaɪ hæd tˈuː hˌɔːɹɪzˈɔntəl dˈʌbəlɛkspˈænʃən stˈiːm ˈɛndʒɪnz, ˈiːtʃ dɹˈaɪvɪŋ wˈʌn ʃˈæft, jˈuːzɪŋ stˈiːm səplˈaɪd baɪ sˈɪks sɪlˈɪndɹɪkəl bˈɔɪlɚz.