Nice looking boat.
You can always type in the instructions at
http://babel.altavista.com/tr
And translate them a line at a time.[&:]
Or copy and paste the text from the online graupner PDF
http://www.graupner.com/fileadmin/do...ungen/2197.pdf
Pages 12 - 29 are actually in english, but they have an odd line through the text.[:'(]

The Kontio was also reviewed in "Model Boats Magazine", December 2000 Issue
You may be able to come up with a back issue at the library, or find a copy online.

Here is someone elses build up, it has good images that might help.
http://www.jsyrovat.d2.cz/models/002_Kontio/Kontio.html
He has fixed pitch propellers.

Another build up.
http://www.kuester-home.de/pageID_2553639.html

Where did you get your variable pitch propellers? Who made them?