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Knot meter and depth sounder are next to each other just outboard of the keel about one third forward of the stern. There is a molded factory-made flat spot in the hull for the two sensors.
I followed two wires from the instruments. I am not sure which is which but I figured when I got under the boat it would be obvious.
From the inside the wires lead to plastic threaded ends, one is about 2" and the other is less than an inch. The wires are bedded in a silicone product. A threaded collar is easily movable from both devices but when removed it does not appear that the sensor comes out from the inside. The threaded collar seems to be pulling it snug to the hull, suggesting it is only removed from the outside.
I've researched what a typical installation is supposed to look like and this is apparently not typical.
Now back to my questions;
Are there other ways this thing might have been put together?
Or, is it likely that a factory made cap was put on the outside for hull work?
Or, is there such a thing as a solid state water flow meter that works with Raymarine ST50 ?
In over my head?
First Boat, a well-equipped 1977 Camper Nicholson 31
What is all this stuff and how does it work?
Last edited by hertfordnc; 06-02-2008 at 10:57 AM.