You can find passport application and Passenger data on the the Institute for Migration- Finland web page. You can pay a small fee to get an expanded search- 15 euros now. There is also a free search option too.

I searched Koski and Kurikka and the only Ville I found was a Ville with a wife Aina, leaving Finland 4.1909 going to Duluth MN.

I did find 2 other Koski names in Kurikka. It's possible they are relatives.

Salomon Viktor born 1881. Passport application 1901.
Jaakko born 1880. Passport application 1914.

Searching passenger data on this web page,I find a Wiljam Koski, age 11, going to Hancock in 1913. There are also the first names Vilho, Wilhelm, William and Viljo Koski. Many of these are coming with family or a spouse. I don't see a match for you.