Airmar P72 - Manual

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In-Hull & Trolling Motor
Puck Transducer
Models: P72, P76, P78
Applications
• Fiberglass hulls only
• Recommended for high-speed boats
• P72 and P76 accommodate a deadrise angle of 10
° or less
• P78 accommodates a deadrise angle of 10 ° – 22 °
Mounting Location
About Fiberglass Hulls
Since the hull absorbs acoustic energy, transmitting through the
hull reduces the transducer’s performance. Fiberglass hulls are
often cored in places for added strength or to reduce weight. These
cored areas contain balsa wood or structural foam which are poor
sound conductors. Do not locate the transducer over coring.
Placement
CAUTION: Do not mount the transducer near water intake or
discharge openings or behind strakes, fittings, or hull irregularities
that will disturb the water flow.
Choose a location:
• Where the fiberglass is SOLID (no air bubbles are trapped in
the fiberglass resin) and where no coring, flotation material, or
dead air space is sandwiched between the inside skin and outer
skin of the hull.
• Where the hull below the transducer will be in contact with the
water at all times.
• Where the water flowing under the hull is smoothest with a
minimum of bubbles and turbulence (especially at high speeds).
• 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.
• Where the transducer beam will not be blocked by the keel or
propeller shaft(s).
• Where there is adequate space inside the vessel for
installation.
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
INSTALLATION INSTRUCTIONS OWNER’S GUIDE &
Follow the precautions below for optimal
product performance and to reduce the risk of
property damage, personal injury, and/or death.
WARNING: Always wear safety goggles and a dust
mask when installing.
CAUTION: Chose the transducer designed for your
boat’s deadrise angle. Never use adhesive to fill gaps
between the transducer and the hull since this will
greatly reduce the transducer’s performance.
CAUTION: The fiberglass hull below the transducer
must be SOLID. The transducer will not transmit
through coring material such as foam or balsa wood.
CAUTION: Never pull, carry, or hold the transducer by
the cable. This may sever internal connections.
CAUTION: Never use solvents. Paint, sealants,
cleaners, fuel, and other products may contain
solvents that can damage plastic parts, especially
connectors.
IMPORTANT: Please read the instructions completely
before proceeding with the installation. These
instructions supersede any other instructions in your
instrument manual if they differ.
P72
P76
P78
In-Hull Mount
Tools & Materials
Safety goggles
Dust mask
Duct tape
Pole
Detergent (some installations)
Weak solvent (such as alcohol)
Disk sander (some installations)
Thin sealable plastic bag (some installations)
Cable ties
Water-based lubricant (such as K-Y
® jelly) (some installations)
Grommet(s) (some installations)
Installation in a cored fiberglass hull:
Electric drill
Hole saw
78mm or 3"
Miniature disk sander (such as Dremel Moto-Tool)
Casting epoxy (such as Polypoxy #7035/7040 by Pettit)
Paper cup
Stirrer