Installation Instructions

ManualsBrandsFuruno ManualsSensorsFuruno 235DHT-MSE

low profile

P319

17-006-01 rev. 11 01/26/11

Thru-Hull, Depth

Transducer

Low Profile, Flush, and Retractable Models

Applications

• Plastic housing recommended for fiberglass or metal hull only.

Never install a plastic transducer in a wood hull, since swelling

of the wood can possibly fracture the plastic.

• Bronze housing recommended for fiberglass or wood hull.

Never install a bronze housing in an aluminum hull, because

electrolytic corrosion will occur.

• Stainless steel housing compatible with all hull materials.

Recommended for aluminum hull to prevent electrolytic corrosion

provided the stainless steel housing is isolated from the metal hull.

• Accommodates up to a 20° deadrise angle.

Tools & Materials

Safety goggles

Dust mask

Electric drill with 10mm (3/8") or larger chuck capacity

Drill bit: 3mm or 1/8"

Hole saw (see table opposite)

Countersink tool (installing a flush housing)

Sandpaper

Mild household detergent or weak solvent (such as alcohol)

File (installation in a metal hull)

Marine sealant (suitable for below waterline)

Additional washer [for aluminum hull less than 6mm (1/4") thick]

Slip-joint pliers (installing a metal housing)

Grommet(s) (some installations)

Cable ties

Water-based anti-fouling paint (mandatory in salt water)

Installation in a cored fiberglass hull (see page 4):

Hole saw for hull interior: (see table on this page)

Fiberglass cloth and resin

or Cylinder, wax, tape, and casting epoxy

Identify Your Model

The model name is printed on the cable tag.

Model

(Housing)

Minimum

Headroom

Outside Hull

Hole Saw Size

Cored Fiberglass Hull

Hull Interior

Hole Saw Size

Low Profile:

B22, B117,

P19, P319

95 mm (3-3/4") 51 mm or 2" 60 mm or 2-3/8"

P5 161mm 6-3/8”) 51 mm or 2" 60 mm or 2-3/8"

Flush:

B21, P219, P269

100 mm (4") 51 mm or 2" 60 mm or 2-3/8"

Retractable:

B17, B21

P17, P217, P314

200 mm (8") 51 mm or 2" 60 mm or 2-3/8"

Retractable:

SS577

200 mm (8")

51 mm or 2"

in a fiberglass or

wood hull

57 mm or 2-1/4"

in a metal hull

60 mm or 2-3/8"

Record the information found on the cable tag for future reference.

Part No._________________Date___________Frequency________kHz

INSTALLATION INSTRUCTIONSOWNER’S GUIDE &

retractable

low profile

B17

P219

flush

WARNING: Always wear safety goggles and a dust

mask when installing to avoid personal injury.

WARNING: Immediately check for leaks when the

boat is placed in the water. Do not leave the boat

unchecked for more than three hours. Even a small

leak may allow considerable water to accumulate.

WARNING: Retractable models—The O-rings must

be intact and well lubricated to make a watertight seal.

WARNING: Retractable models—Always attach the

safety wire to prevent the insert or blanking plug from

backing out in the unlikely event that the cap nut fails

or is screwed on incorrectly.

WARNING: B117 and P319—Do not use the spacer

if there is insufficient space to tighten the nut or it is

within 11mm (1/2") of the top of the housing.

WARNING: Stainless steel housing in 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.

CAUTION: Never pull, carry, or hold the transducer by

its cable; this may sever internal connections.

CAUTION: Never use solvents. Cleaners, fuel,

sealants, paint, and other products may contain strong

solvents, such as acetone, which attack many

plastics, greatly reducing their strength.

CAUTION: Plastic housing—Never use a fairing with

a plastic housing; the protruding sensor would be

vulnerable to damage from impact.

CAUTION: Metal housing—Never install a metal

housing on a vessel with a positive ground system.

CAUTION: Stainless steel housing in metal hull—

Stainless steel must be isolated from a metal hull to

prevent electrolytic corrosion. Use the isolation

bushing supplied.

IMPORTANT: Read the instructions completely

before proceeding with the installation. These

instructions supersede any other instructions in your

instrument manual if they differ.

Summary of content (4 pages)

PAGE 1
OWNER’S GUIDE & INSTALLATION INSTRUCTIONS Thru-Hull, Depth Transducer Part No._________________Date___________Frequency________kHz low profile P319 retractable low profile B17 flush P219 17-006-01 rev. 11 01/26/11 Low Profile, Flush, and Retractable Models Record the information found on the cable tag for future reference. WARNING: Always wear safety goggles and a dust mask when installing to avoid personal injury. WARNING: Immediately check for leaks when the boat is placed in the water.
PAGE 2
Installation Hole Drilling Cored fiberglass hull—Follow separate instructions on page 4. large displacement hulls small displacement hulls planing hulls stepped hull outboard and I/O 1. Drill a 3 mm or 1/8" pilot hole from inside the hull. If there is a rib, strut, or other hull irregularity near the selected mounting location, drill from the outside. 2. Using the appropriate size outside hull hole saw, cut a hole perpendicular to the hull from outside the boat (see table on page 1).
PAGE 3
fiberglass or wood hull flush housing retractable insert fiberglass hull plastic, bronze, or stainless steel housing (P319/B117 shown) fiberglass or wood hull metal housing retractable insert (B17 shown) (P217 shown) pull ring pull ring transducer insert transducer insert safety wire safety wire cap nut housing housing hull nut (plastic/metal) hull nut cap nut (plastic) housing hull nut washer spacer washer hull washer hull hull marine sealant on flange and side wall of housing marine
PAGE 4
9-12 mm (3/8-1/2") larger than the hole through the hull’s outer skin pour in casting epoxy inner skin core hull thickness solid or hollow cylinder outer skin Figure 4. Preparing a cored fiberglass hull Copyright © 2005 Airmar Technology Corp. 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 1) (see Figure 4). 3.