Chapter 2: Transducer Installation
49
Figure 2-17: Preparing a Cored Fiberglass Hull
6. Sand and clean the area around the hole, inside and outside, to ensure that
the sealant will adhere properly to the hull. If there is any petroleum residue
inside the hull, remove it with either mild household detergent or a weak sol-
vent (alcohol) before sanding.
7. Proceed with
Seating
on
page 43
and
Attaching the Transducer
on
page 44
.
Check for Leaks
CAUTION:
Never install a thru-hull transducer and leave the boat unchecked
for several days.
1. When the boat is placed in the water, immediately check around the thru-hull
transducer for leaks. Note that very small leaks may not be readily observed.
Do not to leave the boat in the water for more than 3 hours before checking it
again. If there is a small leak, there may be considerable bilge water accumu-
lation after 24 hours (probably not enough to cause water damage). If a leak
is observed, repeat
Seating
on
page 43
and
Attaching the Transducer
on
page 44
immediately.
Hull
Dimension equal to the thickness of the hull's
outer skin to ensure adequate clearance
Inner skin
Outer skin
Core
Solid or
hollow
cylinder
D4865-2
Casting epoxy
