Furuno FCV-587 Operator'S Manual Download

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APPENDIX 2 INSTALLATION FOR TRANSDUCER (THRU-HULL MOUNT)

AP-6

Stainless steel housing in a metal hull

- To prevent

electrolytic corrosion, the stainless steel housing must be
isolated from the metal hull. Slide the isolation bushing
onto the housing (see Figure 5). Apply additional marine
sealant to the surfaces of the bushing that will contact the
hull, filling any cavities in and around the isolation bushing.

Cable Routing & Connecting

CAUTION

: If your transducer came with a connector, do not

remove it to ease cable routing. If the cable must be cut and
spliced, use Airmar’s splash-proof Junction Box No. 33-035
and follow the instructions provided. Removing the
waterproof connector or cutting the cable, except when using
a water-tight junction box, will void the sensor warranty.

P19 housing

B150M, B619, SS150M, or SS619

B60, B75H/M/L, or SS60

Marine sealant on flange
and sidewall of housing

Figure 4. Bedding and installing in solid fiberglass or wood hull

Housing

Wrench
flat (2)

Hull nut

Washer

Hull

Wrench
flat (2)

Housing

Hull nut

Washer

Hull

Spacer

Wrench
flat (2)

Housing

Hull nut

Washer

Hull

1. From outside the hull, thread the cable through the

mounting hole. Push the housing into the mounting hole
using a twisting motion to squeeze out excess sealant.

12° and 20° models

- From inside the hull, point the arrow

on the top of the transducer (and the cable exit) toward the
KEEL or centerline of the boat (see Figure 1). This will
align the angle of the element inside the transducer with
the deadrise angle of your hull.

2. Slide the washer onto the housing (see Figure 4 or 5).

B150M, B619, SS150M, SS619

- Also slide the spacer

onto the housing and rest it against the washer. Do not use
the spacer if there is insufficient space to tighten the nut or
it is within 11 mm (1/2") of the top of the housing.

Stainless steel housing in a metal hull

- Be sure the

washer contacts the hull. Do not tighten the hull nut with
the washer against the isolation bushing, as the housing
will not be firmly installed. If necessary, sand the isolation
bushing until the washer rests against the hull.

3. Screw the hull nut in place.

Plastic housing

- Do not clamp tightly on the wrench flats

to avoid possibly fracturing the housing.

Installing

Plastic hull nut

- Hand-tighten only. Do not over tighten.

Metal hull nut

- Tighten with slip-joint pliers.

Metal hull

- Use the spacer if there are not enough threads

to tighten the hull nut against the hull.

Cored Fiberglass Hull

- Do not over tighten, crushing the

hull.

Wood hull

- Allow the wood to swell before tightening the

hull nut.

4. Remove any excess marine sealant on the outside of the

hull to ensure smooth water flow under the transducer.

1. Route the cable to the instrument, being careful not to tear

the cable jacket when passing it through the bulkhead(s)
and other parts of the boat. Use grommets to prevent
chaffing. To reduce electrical interference, separate the
transducer cable from other electrical wiring and the
engine. Coil any excess cable and secure it in place using
cable ties to prevent damage.

2. Refer to the echosounder owner’s manual to connect the

transducer to the instrument.

SS565

solid fiberglass or wood hull

SS565

metal hull

SS60, SS150M, or SS619

metal hull

(SS619 shown)

Marine sealant on flange
and sidewall of housing

Marine sealant on flange and
sidewall of housing and isolation
bushing where it contacts the hull

Figure 5. Bedding and installing