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OWNER'S GUIDE & INSTALLATION INSTRUCTIONS
Cavity or Welded-tank Mount:
Multi-beam Sonar & Depth Transducer
Chirp Models: CM548, CM549LHW
Patent http://www.airmar.com/patent.html
Furuno: 165T/265LH-PM488 &
WARNING: The transducer must be professionally installed
using accepted practices. The cavity or welded tank must
be strong and watertight to reduce the risk of property
damage, personal injury, and/or death.
Follow the safety precautions below for optimal
product performance and to reduce the risk of
property damage, personal injury, and/or death.
WARNING: Always wear safety glasses, a dust mask, and
ear protection when installing.
WARNING: Use marine sealant to seal the hull and hold
the transducer firmly in place. When the boat is underway,
especially at high speeds, water will enter any gaps and
push against the transducer with considerable force.
WARNING: A faceplate is required to secure the
transducer to the hull. When the boat is underway,
especially at high speeds, water will push against the
transducer with considerable force.
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: Always operate the transducer in water.
Operating in air will allow the transducer to overheat
resulting in failure.
CAUTION: Do not install in the engine compartment or
other hot place. The transducer may fail if it overheats.
CAUTION: The transducer must be flush with the bottom
of the hull for good performance.
CAUTION: Never pull, carry, or hold the transducer by the
cable. This may sever internal connections.
CAUTION: Never strike the transducer.
CAUTION: Never power sand or pressure wash the
transducer. It may weaken the structure or damage the
internal components.
1kW
with Temperature Sensor
165T/275LHW
285mm (11.21")
CAUTION: Never use solvents. Cleaners, fuel, sealants,
paint, and other products may contain solvents that can
damage plastic parts, especially the transducer's face.
IMPORTANT: Please read the instructions completely
before proceeding with the installation. These instructions
supersede any other instructions in your instrument
manual if they differ.
Applications
• Cavity mounting recommended for fiberglass hulls.
• Cavity mounting recommended for high-speed boats.
Tools & Materials
NOTE: Making a fiberglass cavity in the hull, a faceplate or a
welded tank requires additional tools and materials not listed.
Safety glasses
Dust mask
Ear protection
Scissors
Masking tape
Electric drill
Drill bits and hole saws:
Pilot hole
3mm or 1/8"
Cable holes (3)
large enough to accommodate the bushings
Sandpaper (coarse grit 120)
Tack cloth
Marine sealant (suitable for below waterline)
Grommet(s) (some installations)
Cable ties
Water-based anti-fouling coating (mandatory in salt water)
BOW
6mm
(0.24")
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