Juho Juuso Lukkari from Finland

My grandmom`s oldest brother Juho Juuso Lukkari 11.12.1883 was travelled from Hanko Finland 13.12.1905 to Britain and then to Usa. He boat was first SS Arcturus Gunard Line and then Saxonia to Michigan (Ishpeming?) Usa. Juho`s passnumber was 981. Something happend to Juho, because he died 28.7.1908 only 22 yeard old in USA. I am making my heritage and I`m interesting to know how Juho was died. Was he sick or maybe something happend? Can someone help me and my cousins.