And i saw some interesting things...
The first one is a Selva with a jet:

And the other one was this thing:

In the background you ca see another futuristic engine, looks like a aluminium toilet with a carburettor and a screw. And the guy had some other very old, interesting engines. Here is his homepage: http://museumdeverzamelaar.nl/en/oplocatie.htm
And i saw some more old engines, from a sideboard- to an inboardengine, and many beautiful boats. But it was not possible do make photos. There have been to many peoples...