Airmar 1 kW—TM258 - Manual

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Transom Mount, 1kW with Short Release Bracket
Depth Transducer
with Temperature Sensor
Models: TM258, TM260, TM265LH, TM265LM,
TM270W, TM275LH-W
U.S. Patent No. 7,369,45; 8,582,393. UK Patent No. 2 414 077
Tools & Materials
Safety goggles
Dust mask
Angle finder
Masking tape (some installations)
Pencil
Electric drill
Drill bits and hole saws:
Bracket holes 5mm, #4, or 7/32"
Transom hole (optional) 18mm, 11/16", or 3/4"
21mm or 13/16"
(Furuno, Raymarine only)
Cable clamp holes 3mm or 1/8"
Marine sealant (suitable for below waterline)
Socket wrench
Straight edge
Small screwdriver
Grommet(s) (some installations)
Cable ties
Water-based anti-fouling paint (mandatory in salt water)
Applications
• Recommended for outboard and inboard/outboard sport fishing
powerboats 8m (25') and up
• Not recommended for inboard powerboats
• Not recommended for stepped hulls
• Adjusts to transom angles from 3°–21°
• Bracket protects transducer from frontal impact only
Mounting Location
Guidelines
CAUTION: Do not mount the transducer in line with or near water
intake or discharge openings or behind strakes, fittings, or hull
irregularities that may disturb the water flow.
CAUTION: Avoid mounting the transducer where the boat may be
supported during trailering, launching, hauling, or storage.
• For best performance, the transducer’s face must be in contact
with smooth water. To identify an area of “clean” water, observe
the flow off the transom while the boat is underway.
• Allow space above the bracket for it to release and rotate the
transducer upward.
• Mounting on the side of the transom where the propeller blades
are moving downward is preferred (see Figure 1).
• Mount the transducer as close to the centerline (keel) of the
boat as possible to ensure the transducer’s face remains in the
water when the boat is turning. However, be sure it is a
minimum of 15 cm (6") beyond the swing radius of the propeller,
so the water passing under the transducer does not cause a
flow disturbance to the propeller.
Record the information found on the cable tag for future reference.
Part No.________________ Date___________ Frequency________ kHz
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.
WARNING: When the boat is placed in the water,
immediately check for leaks around the screws and
any other holes drilled in the hull.
CAUTION: CHIRP transducer—Always operate the
transducer in water. Operating in air will allow the
transducer to overheat resulting in failure.
CAUTION: Never pull, carry, or hold the transducer by
the cable as this may sever internal connections.
CAUTION: Never strike the transducer to release it.
When mounted on the bracket, remove the transducer
by removing the locking pin and hinge pin.
CAUTION: Never use solvents. Cleaner, fuel, sealant,
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.
Figure 1. Mounting location on single drive boat
15cm (6")
minimum beyond
swing radius
NOTE: Starboard
side of hull where
propeller blades
are moving down-
ward is preferred.
Copyright © 2009 - 2010 Airmar Technology Corp.
hull projection
0–3mm (0–1/8")
parallel to
waterline
TM260
bracket with shims
operational position
INSTALLATION INSTRUCTIONS OWNER’S GUIDE &