On Sat, 9 Aug 2003 17:45:04 -0700, "Calif Bill"
wrote:

Does not work on aluminum hulls.
Bill


Partially true. Transducers with speed and/or temp sensors don't work
well through aluminum. Otherwise, it's "do-able".

"Puck" style transducers can normally be used through an aluminum hull
if mounted in a small oil or water box (i.e. sealed Tupperware
container with the bottom removed, siliconed to the hull). Silicone
has been used to directly adhere the puck to the hull, but the results
aren't consistent- works for some, not for others. Epoxy will usually
break loose when the hull flexes, or due to different thermal
expansion rates.

Bronze body transducers should never be mounted directly to a
dissimilar metal. It causes corrosion. Use plastic bodied pucks.

Here are just a few links to illustrate:

http://www.wmi.org/bassfish/bassboar...ors/T62325.htm
http://www.vexilar.com/help/tips/tip003.html
http://www.vexilar.com/help/tips/tip015.html

I intend to experiment with alternative adhesives in my 14' jon boat
(more dense than silicone, more flexible than epoxy).
I'll let you know how it works out.
noah

Courtesy of Lee Yeaton,
See the boats of rec.boats
www.TheBayGuide.com/rec.boats