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layers. The sonar signal must pass through solid fiberglass. A
successful transducer installation can be made on hulls with flotation
materials (such as plywood, balsa wood or foam) between layers of
fiberglass if the material is removed from the chosen area.
Use epoxy to place the transducer in a solid portion of the hull.
For example, some (but not all) manufacturers use a layer of fiberglass,
then a core of balsa wood, finishing with an outer layer of fiberglass.
Removing the inner layer of fiberglass and the balsa wood core exposes
the outer layer of fiberglass. The transducer can then be epoxied
directly to the outer layer of fiberglass. After the epoxy cures for 24
hours, fill the remaining space with polyester resin. When the job is
finished, the hull is watertight and structurally sound. Remember, the
sonar signal must pass through
solid
fiberglass. Any air bubbles in the
fiberglass or the epoxy will reduce or eliminate the sonar signals.
WARNING:
Do not remove any material from your inner hull unless
you know the hull's composition. Careless grinding or
cutting on your hull can result in damage that could
sink your boat. Contact your boat dealer or
manufacturer to confirm your hull specifications.
Testing Determines Best Location
Ideally, the shoot-thru transducer should be installed as close to the
transom as possible, close to the centerline. This will give you the best
performance during high speed maneuvers.
Inner hull
Epoxy to hull first
Outer hull
Flotation material
Fill with resin
Fill with resin
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