Airmar B122—Long-Stem - Manual

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Thru-Hull, Retractable
Long-stem Sensors
Models: B122, DST800L, ST700
U.S. Patents.: 6,904,798; 7,110,908; 7,352,171. UK Patents: 2 407 874; 2 409 527
IMPORTANT: Read the instructions completely before
proceeding with the installation. These instructions supersede any
other instructions in your instrument manual if they differ.
Application
• Recommended for a thick hull.
• Bronze housing recommended for fiberglass or wood hull.
Never install a bronze housing in a metal hull because electrolytic
corrosion will occur.
• Flush-mount accommodates a deadrise angle up to 10°.
• Fairing accommodates a deadrise angle up to 28
°.
• Maximum hull thickness with 35 ° deadrise angle and fairing
(measured perpendicular to the water surface): 47mm (1-7/8")
Pretest
Connect the insert to the instrument and spin the paddlewheel if any.
Check for the approximate air temperature and any speed reading . If
there is no reading(s), check all the connections and repeat the test. If
there is still no reading(s) or it is inaccurate, return the product to your
place of purchase.
Tools & Materials
Safety goggles
Dust mask
Water-based anti-fouling paint (mandatory in salt water)
Electric drill with 10mm (3/8") or larger chuck capacity
Drill bits:
3mm or 1/8" (pilot hole)
11mm or 7/16" (anti-rotation bolt hole
Hole saw: 51mm or 2" (flush mount
57mm or 2-1/4"
(installation with adapter ring)
Angle finder (some installations)
Band saw (faring installation)
Rasp or power tool (fairing installation)
Sandpaper
Mild household detergent or weak solvent (such as alcohol)
Marine sealant (suitable for below waterline)
Slip-joint pliers
Mallet (some installations)
Countersink tool (flush installation)
Grommet(s) (some installations)
Cable ties
Installation in a cored fiberglass hull (see page 6)
Hole saw for hull interior:
Sensor: min. 60mm or 2-3/8"
Anti-rotation bolt: min. 19mm or 3/4"
Cylinder, wax, tape, and casting epoxy
B122
ST700
INSTALLATION INSTRUCTIONS OWNER’S GUIDE &
Follow the safety precautions below to reduce
the risk of poor product performance, property
damage, personal injury, and/or death.
WARNING: Always wear safety goggles and a dust
mask when installing.
WARNING: Fairing—The High-Performance Fairing
requires an anti-rotation bolt. Failure to install the anti-
rotation bolt may result in the fairing rotating while the
boat is underway. The effect may be violent
movement and loss of steering.
WARNING: Fairing—The fairing must be installed
parallel to the keel to ensure proper boat handling.
WARNING: Fairing—Do not install a fairing that has
been mis-cut. Replace it. Failure to do so may result in
the fairing rotating while the boat is underway.
- Cutting the fairing at an angle greater than the 35°
maximum allowed will cut into the sensor and/or bolt
pocket, thus weakening the fairing.
- Do not allow any gap between the fairing and the hull that
is greater than 3mm (1/8"). When the boat is underway,
water will enter any gaps and push against the fairing with
considerable force.
WARNING: Do not over tighten the hull nut and nut on
the anti-rotation bolt, crushing the hull and/or fairing.
WARNING: The O-rings must be intact and well
lubricated to make a watertight seal.
WARNING: The valve is not a watertight seal!
Be sure
the insert or blanking plug is fully inserted into the housing,
and the cap nut is screwed on completely.
WARNING: 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: 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.
CAUTION: Never install a metal sensor on a vessel
with a positive ground system.
CAUTION: Never pull, carry, or hold the sensor by its
cable; this may sever internal connections.
CAUTION: Never strike the sensor.
CAUTION: The arrow on the top of the insert must
point forward toward the bow when installed.
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.
Record the information found on the cable tag for future reference.
PN:___________________Date___________Frequency_________kHz
depth
DST800L
TRIDUCER®
Multisensor
speed &
temperature
low-profile
flush
flush
B123 housing
B122 housing
B122 housing