Furuno FCV-588 Operator'S Manual Download

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APPENDIX 2 INSTALLATION FOR TRANSDUCER (THRU-HULL MOUNT)

AP-7

Maintenance & Replacement

6. Sand and clean the area around the hole, inside and

outside, to ensure that the marine 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 solvent (alcohol) before sanding.

7. Proceed with “Bedding” on page AP-5.

Figure 6. Preparing a cored fiberglass hull

Checking for Leaks

When the boat is placed in the water,

immediately

check around the transducer for leaks. Note that very
small leaks may not be readily observed. Do not 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 accumulation after 24 hours. If
a leak is observed, repeat “Bedding” and “Installing”

immediately

(see pages AP-5 to AP-6).

Anti-fouling Paint

Model

Hull Nut

Washer

Isolation

Bushing

P19

04-004

09-452

B60

02-133-01

09-813-01

B150M
B619

02-143-01

09-1012-01

SS60

02-030

09-452

B75H/M/L

02-563-01

09-813-01

04-660-01

SS150M
SS619

02-520-02

09-452

04-186-1

Hull thickness

9-12 mm
(3/8-1/2") larger
than the hole
through the hull’s
outer skin

Inner skin

Core

Outer skin

Solid or hollow cylinder

Pour in
casting epoxy

Installation in a Cored Fiberglass Hull

The core (wood or foam) must be cut and sealed carefully.
The core must be protected from water seepage, and the
hull must be reinforced to prevent it from crushing under
the hull nut allowing the housing to become loose.

CAUTION

: Completely seal the hull to prevent water seepage

into the core.

1. Drill a 3 mm or 1/8" pilot hole from inside the hull (see

Figure 6). If there is a rib, strut, or other hull irregularity
near the selected mounting location, drill from the outside.
(If the hole is drilled in the wrong location, drill a second
hole in a better location. Apply masking tape to the outside
of the hull over the incorrect hole and fill it with epoxy.)

2. Using the appropriate size outside hull hole saw, cut a hole

from outside the hull through the outer skin only (see table
on page AP-5).

3. From inside the hull, using the appropriate size hull interior

hole saw, cut through the inner skin and most of the core.
The core material can be very soft. Apply only light
pressure to the hole saw after cutting through the inner
skin to avoid accidentally cutting the outer skin.

4. Remove the plug of core material, so the inside of the

outer skin and the inner core of the hull is fully exposed.
Sand and clean the inner skin, core, and the outer skin
around the hole.

5. If you are skilled with fiberglass, saturate a layer of

fiberglass cloth with a suitable resin and lay it inside the
hole to seal and strengthen the core. Add layers until the
hole is the correct diameter.
Alternatively, a hollow or solid cylinder of the correct
diameter can be coated with wax and taped in place. Fill
the gap between the cylinder and hull with casting epoxy.
After the epoxy has set, remove the cylinder.

Surfaces exposed to salt water must be coated with
anti-fouling paint. Use water-based anti-fouling paint only.
Never use ketone-based paint, since ketones can attack
many plastics possibly damaging the transducer. Reapply
anti-fouling paint every 6 months or at the beginning of
each boating season.

Cleaning

Aquatic growth can accumulate rapidly on the
transducer’s face, reducing its performance within weeks.
Clean the surface with a Scotch-Brite® scour pad and
mild household detergent, being careful to avoid making
scratches. If the fouling is severe, lightly wet sand it with
fine grade wet/dry paper.

Replacement Transducer & Parts

The information needed to order a replacement
transducer is printed on the cable tag. Do not remove this
tag. When ordering, specify the part number, date, and
frequency in kHz. For convenient reference, record this
information on the top of page AP-4.

Lost, broken, and worn parts should be replaced
immediately.

04-589-01

SS565

02-563-01

09-813-01

Spacer

04-646-01

Obtain parts from your instrument manufacturer or
marine dealer.

Gemeco

Tel:803-693-0777

(USA)

Fax:803-693-0477