17-438-01 re
v.
02
06/07
TRIDUCER
®
Multisensor with Valve
Models: B744V, B744VL
U.S. Patents: 4,898,029; 5,186,050, Re 33,982. Australian Patent 605,281
Canadian Patent 1,313,775. Japanese Patent 1851014.
Applications
• Bronze housing recommended for fiberglass or wood hulls.
• Never
install a bronze housing in a metal hull because
electrolytic corrosion will occur.
• Never
install a metal housing in a vessel with a positive ground
system.
Pretest
Connect the multisensor to the instrument and spin the
paddlewheel. Check for a speed reading and the approximate air
temperature. If there is no reading or it is inaccurate, check the
connections and repeat the test. If there is still no reading or they
are inaccurate, return the product to the place of purchase.
Tools & Materials
Fairing (
MANDATORY
) (High-Performance fairing recommended)
Safety goggles
Dust mask
Electric drill
Drill bit:
3mm
or
1/8"
Hole saw:
51mm
or
2"
Sandpaper
Mild household detergent
or
weak solvent (such as alcohol)
Angle finder
or
digital level
Band saw
or
hand saw
Rasp
or
power tool
Marine sealant (suitable for below waterline)
Slip-joint pliers
Zip-ties
Water-based antifouling paint (
MANDATORY IN SALT WATER
)
Installation in a cored fiberglass hull (see page 4):
Hole saw for hull interior:
60mm
or
2-3/8"
Cylinder, wax, tape, and casting epoxy
About High-Performance Fairings
Airmar recommends installing a High-Performance Fairing unless
insufficient space demands a Standard Fairing. Airmar’s High-
Performance Fairings have a long streamlined shape that directs
water around the multisensor to minimize drag. They give excellent
results at all speeds and especially above 15 knots (see
Replacement Multisensor & Parts on page 6).
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
IMPORTANT
: THE MULTISENSOR MUST BE
INSTALLED CAREFULLY! Please read the
instructions completely before proceeding with the
installation. These instructions supersede any other
instructions in your instrument manual if they differ.
INSTALLATION INSTRUCTIONS
OWNER’S GUIDE &
B744V
Standard
WARNING: The multisensor must be
installed with a fairing!
A fairing that is carefully cut to fit the shape of the hull provides a
sealing surface around the drilled hole. If the multisensor is not
installed with a fairing, there may be insufficient surface area to
seal the hull. Water may leak into the boat causing damage or
possibly sinking.
WARNING: Installation with a High-Performance
Fairing requires an anti-rotation bolt!
For installation using a High-Performance Fairing, follow the
supplemental instructions that comes with the fairing. A 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. This could result in serious injury or death to
passengers and/or damage to the boat or other property.
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.
High-Performance
Fairing
Fairing
