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1. MOUNTING
525STID-PWD
The optional triducer 525STID-PWD is designed for transom mounting.
However, select the location where influ-
ences from bubbles and turbulences are
minimal to ensure the best performance.
Allow adequate space above the bracket
for it to release and rotate the sensor
upward as shown in the right illustration.
Mount the sensor close to the centerline
of your boat. On slower heavier displacement hulls,
positioning it farther from the centerline is accept-
able.
For single drive boat, mount on the star-board side
at least 75 mm (3") beyond the swing radius of the
propeller, as shown in the right figure.
For twin drive boat, mount between the drives.
Note 1: Do not mount the sensor in an area of turbulence or bubbles, near water in-
take 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.
Pretest 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.
How to install the bracket
1. Cut out the installation template (enclosed with transducer) along the dotted line.
2. At the selected location, position the template, so the arrow at the bottom is
aligned with the bottom edge of the transom. Being sure the template is parallel
to the waterline, tape it in place.
Warning: Always wear safety
goggles and a dust mask.
3. Using a 4 mm, #23, or 9/64" bit, drill
three holes 22 mm (7/8") deep at
the locations indicated. To prevent
drilling too deeply, wrap masking
tape around the bit 22 mm (7/8")
from the point.
Fiberglass hull: Minimize surface cracking by chamfering the gelcoat. If a
chamfer bit or countersink bit is not available, start drilling with a 6mm or 1/4" bit
to a depth of 1 mm (1/16").
1-14
Height without
speed sensor
191 mm (7-1/2")
Height with
speed sensor
213 mm (8-1/2")
Align template vertically.
Align template arrow with
bottom edge of transom.
Height
Height
75 mm (3")
minimum beyond
swing radius
Deadrise angle
Slope of hull
Parallel to
waterline
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