gudmundur wrote:
Hi folks, Just bought a Faria dash mounted depth sounder with a
'glue it inside the hull' transducer. Faria warns that it won't work
very good if my hull has core material in it.......

What are the chances it will work o.k. out to perhaps 20 feet if I just
go ahead and glue it in anyway?

Very slim. It won't "see" thru the core at all.

... I really don't want to remove the inner
fiberglass shell, and the wooden core, just to glue the transducer on
the inside of the outer skin.

You can try putting the transducer against a baggy of water, and hold it
by hand against a few different spots in the hull to see if you can find
a place it will read. Maybe you'll get lucky and find a spot it can read
thru.

You could also mount it on the transom.

It's not that big a deal to make a transducer bubble on the inside of
your hull, you already have a Dremel tool right

Fair Skies
Doug King