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4. INSTALLATION
30
b)Gently dismount the transducer with a
knife or a piece of wood.
c)Reattach the transducer elsewhere as
shown in "Attaching the transducer."
d)Check the installation again.
Final preparation
Support the transducer with a piece of wood
to keep it in place while it is drying. Let the
transducer dry 24-72 hours.
4.5 Triducer
DO NOT overtighten screws. They may be
damaged.
525ST-MSD
The triducer 525ST-MSD is designed for thru-
hull mounting. For how to install this triducer
see paragraph 4.2.
Triducer 525ST-MSD
525ST-PWD
The transom mount triducer with integral
release bracket 525ST-PWD is manufactured
by AIRMAR Co. These instructions are also
included with the sensor.
Pre-test for speed and temperature
Connect the sensor to the instrument and spin
the paddlewheel. Check for a speed reading
and the approximate air temperature. If there
is no reading, return the sensor to your place
of purchase.
Tools and materials needed
Scissors
Masking tape
Safety goggles
Dust mask
Electric drill
Drill bit for:
Bracket holes: 4mm, #23, or 9/64"
Fiberglass hull: chamfer bit (preferred),
6mm, or 1/4"
Transom hole: 19mm or 3/4" (optional)
Cable clamp holes: 3mm or 1/8"
Screwdrivers
Straight edge
Marine sealant
Pencil
Zip-ties
Water-based antifouling paint (mandatory in
salt water).
Mounting location
To ensure the best performance, the sensor
must be submerged in aeration-free and tur-
bulence-free water. Mount the sensor close to
the centerline of the boat. On slower heavier
displacement hulls, positioning it farther from
the centerline is acceptable.
Allow adequate space above the bracket for it
to release and rotate the sensor upward.
Height required at mounting location
Note 1: Do not mount the sensor in an area of
turbulence or bubbles: near water intake or
discharge openings; behind strakes, struts,
fittings, or hull irregularities; behind eroding
paint (an indication of turbulence).
Note 2: Avoid mounting the sensor where the
boat may be supported during trailering,
launching, hauling, and storage.
φ79 mm
1
33 mm
2.00"-12 UN
threads
φ51 mm
27 mm
7 mm
140 mm
Unit: m
m
Heig
ht
H
eight without
s
peed sensor
1
91mm (7-1/2")
H
eight with
s
peed sensor
2
13mm (8-1/2")