OWNER’S GUIDE & INSTALLATION INSTRUCTIONS
Cavity
or
Welded-tank Mount:
1kW
Sealcast
™
Depth Transducer
Chirp Models:
CM265LH, CM265LM
,
CM275LHW
Patent http://www.airmar.com/patent.html
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
Ø 3mm
or
1/8"
Cable hole
large enough to accommodate the bushing
Bolt hole (3)
Ø 8mm
or
5/16"
Sandpaper (coarse grit 120)
Tack cloth
Marine sealant (suitable for below waterline)
Purchased
nuts, bolts & washers (3)
(stainless steel, 1/4"-20 UNC threads)
Torque wrench
Grommet(s) (some installations)
Cable ties
Water-based anti-fouling coating (
mandatory in salt water
)
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
D-
19
79
3-
re
v.
1
101
79
0-re
v.
1
01/
08
/2
1
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 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. The bolts are an aid to
installation only and must not be solely relied upon.
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.