Furuno CA50-200TID-R99, R209TIDN, R309TIDN Installation Instructions

INSTALLATION INSTRUCTIONSOWNER’S GUIDE &

External-Mount, 2 -3kW

Transducer

Models: R99, R209, R309

R109LH, R109LM, R509LH, R509LM, R609LH, R609LM

U.S. Patent No. 7,369,458. UK Patent No. 2 414 077. U.S. Patents Pending

Follow the precautions below for optimal product
performance and to reduce the risk of property
damage, personal injury, and/or death.

WARNING: Boats capable of speeds above 25kn
(29MPH)—You must follow these instructions for a safe

17-335-01 rev. 09 09/08/11

installation. For boats exceeding 35 kn. (40MPH) or when
the instructions cannot be met, mount an in-hull
transducer. At high speeds, the fairing and/or transducer
may break away from the boat.

WARNING: A stuffing tube is required. The stuffing tube
seals the hull forming a water-tight conduit for the cable.

WARNING: The fairing must be installed parallel to the
keel to ensure proper boat handling and water flow under
the transducer.

WARNING: Always wear safety goggles and a dust mask
when installing to prevent personal injury.

WARNING: Immediately check for leaks when the boat is
placed in the water. Do not leave the boat in the water
unchecked for more than three hours. Even a small leak
may allow considerable water to accumulate.

WARNING: Fiberglass hull—The transducer and stuffing
tube must be installed in solid fiberglass, not in coring

CAUTION: Aluminum hull—The stainless steel hardware
must be isolated from an aluminum hull to prevent
electrolytic corrosion.

CAUTION: Steel hull—Follow generally accepted
installation practices.

CAUTION: Never install a metal fitting in a vessel with a
positive ground system.

CAUTION: External mount only. The transducer will
overheat if it is mounted in a hull pocket.

CAUTION: Never pull, carry, or hold the transducer by its
cable. This may sever internal connections.

CAUTION: Never strike the transducer.

CAUTION: Tighten the nylon locking nuts with a torque

wrench using a force not exceeding 27N-m (20ft.-lb.). Do
not over tighten. It may crack the transducer and/or crush
the fairing.

CAUTION: Never use solvents. Cleaners, fuel, paint,
sealants, and other products may contain strong solvents,
such as acetone, which attack many plastics greatly
reducing their strength.

with Temperature Sensor

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

Part No.:_________________Date___________Frequency________kHz

Remove
and discard
the packing
hardware.

Figure 1. Packing hardware

Copyright © 2007 Airmar Technology Cor p.

IMPORTANT: Please read the instructions completely before
proceeding with the installation. These instructions supersede any
other instructions in your instrument manual if they differ.

fairing

transducer

Applications

• Recommended for all hull materials

• Not recommended for hulls less than 9m (30') long

• Not recommended for stepped hulls. Mount an in-hull transducer

• Accommodates a deadrise angle up to 22

°

Unpacking & Pretest

Remove and discard the packing hardware (rod and 2 nuts) (see
Figure 1). Connect the temperature function to the instrument and
check for the approximate air temperature. If there is no reading
or it is inaccurate, check the connections and test again. If there is
still a problem, return the product to your place of purchase.

Tools & Materials

Safety goggles
Dust mask
Angle finder or digital level
Band saw (blade must be very sharp)
Rasp or power tool
Electric drill
Drill bits: pilot hole 3mm or 1/8"

fiberglass, wood, or steel hull14mm or 9/16"
aluminum hull 15mm or 9/16"

Permanent marker
Mild household detergent or weak solvent (such as alcohol)
Sandpaper
File (installation in a metal hull)
Marine sealant (suitable for below waterline)
Wrenches
Torque wrench
Grommet(s) (some installations)
Cable ties
Water-based anti-fouling paint (mandatory in salt water)

pressure waves

1/3

LWL

(Load Waterline Length)

Figure 2. Transducer location on displacement hull

NOTE: Mount within the
aft 1/3 of the hull, as far
back as possible.

Copyright © 2005 Airmar Technology Cor p.

200- 600mm
(8 – 24")

slope of hull

deadrise
angle

parallel to
waterline

• The transducer must be continuously immersed in water.

• The transducer beam must be unobstructed by the keel or
propeller shaft(s).

• Choose a location away from interference caused by power and
radiation sources such as: the propeller(s) and shaft(s), other
machinery, other echosounders, and other cables. The lower
the noise level, the higher the echosounder gain setting that
can be used.

• Choose a location with a minimum deadrise angle, not to
exceed 22

°.

• Choose an accessible spot inside the vessel with adequate
headroom for the height of the stuffing tube and tightening the nuts.

Stuffing Tube

After determining the best mounting location for the transducer,
install the stuffing tube. Follow the installation instructions
packaged with the stuffing tube.

outboard and I/O

Figure 3. Transducer location on planing hull

Copyright © 2005, 2009 Airmar Techn ology Corp.

inboard

Mounting Location

Hull Types

• Displacement hull powerboat—Locate about 1/3 of the way
along the LWL and 200– 600mm (8– 24") off the centerline (see
Figure 2). The starboard side of the hull where the propeller
blades are moving downward is preferred.

• Planing hull powerboat— (see Figure 3)

• Mount within the aft 1/3 of the hull, as far back as possible.

Outboard and I/O—Mount just forward of the engine(s).
Inboard—Mount ahead of the propeller(s) and shaft(s).

• Mount on or as close to the centerline as possible, and well

inboard of the first set of lifting strakes to ensure that the
transducer is in contact with the water at high speeds.

• Mounting on the starboard side of the hull where the

propeller blades are moving downward is preferred.

Placement Guidelines

CAUTION: Do not mount near water intake or discharge openings
or behind strakes, fittings, or hull irregularities that will disturb the
water flow.

• The water flowing under the hull must be smooth with a
minimum of bubbles and turbulence (especially at high speeds).

Fairing: Cutting, Bedding & Installing

Cutting the Fairing

CAUTION: Shape the fairing to the hull as precisely as possible. If
there are gaps between the fairing and the hull near the ends, cut
a new fairing. Over tightening the rods to minimize gaps may
crack the transducer and/or crush the fairing.

1. Measure the deadrise angle of the hull at the stuffing tube using
an angle finder or digital level (see Figure 2).

2. Tilt the band saw table to the measured angle and secure the
cutting fence (see Figure 4). Do not exceed 22°.

3. Place the fairing on the table so the cutting guide rests against
the fence (see Figures 4 and 5). Note the fairing is symmetrical.

4. Adjust the fence so the fairing will be cut in about two equal parts.
The section that will become the fairing must be a minimum of
20mm (3/4") at its thinnest dimension (see Figure 6).

5. Recheck steps 1 through 4; then cut the fairing.

6. Check the fit by placing the fairing against the hull. Be sure the
fairing is parallel to the centerline of the boat (keel), and the
stuffing tube is about 2/3 of the way back in the cavity (see
Figure 5). Hold the fairing on the ends and try to rock it back
and forth. Shape the fairing to the hull as precisely as possible
with a rasp or power tool until it no longer rocks.

7. The remaining section of the fairing with the cutting guide will
be used as the backing block inside the hull. It will provide a
level surface for tightening the nuts on the threaded rods.

2

cutting

guide

fence

Figure 4. Cutting the fairing

Copyright © 2005 Airmar Technolog y Corp.

band saw

table

deadrise

angle

bottom view aft view

Bow

location
of stuffing
tube

Figure 5. Fairing

Copyright © 2007 - 2011 Airmar Techno logy Corp. Copyright © 2005 Airmar Technology Corp.

cutting
guide

cavity for
stuffing
tube

>

NOTE

: After the fairing is cut,
the section with the cutting guide
becomes the backing block.

cutting

guide

20mm

(3/4")

min.

22

Figure 6. Fairing

max

°