4. INSTALLATION
40
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.
Note 3: For single drive boat
, mount on the
starboard side at least 75 mm (3") beyond the
swing radius of the propeller.
Mounting location on single drive boat
Note 4: For twin drive boat
, mount between
the drives.
Installation of bracket
1. Cut out the installation template (en-
closed with transducer) along the dotted
line.
2. At the selected location, position the tem-
plate, so the arrow at the bottom is
aligned with the bottom edge of the tran-
som. Being sure the template is parallel to
the waterline, tape it in place.
Positioning the template
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 crack-
ing by chamfering the gelcoat. If a cham-
fer bit or countersink bit is not available,
start drilling with a 6mm or 1/4" bit to a
depth of 1 mm (1/16").
4. If you know your transom angle, the
bracket is designed for a standard 13°
transom angle.
11°-18° angle: No shim is required. Skip
to step 3 in "Adjustments".
Other angles: The shim is required. Skip
to step 2 of "Adjustments".
If you do not know the transom angle,
temporarily attach the bracket and sensor
to the transom to determine if the plastic
shim is needed.
5. Using the three #10 x 1-1/4" self-tapping
screws, temporarily screw the bracket to
the hull. DO NOT tighten the screws com-
pletely at this time. Follow the step 1-4 in
"Attaching the sensor to the bracket", be-
fore proceeding with "Adjusting".
Adjustments
1. Using a straight edge, sight the underside
of the sensor relative to the underside of
the hull. The stern of the sensor should be
1-3 mm (1/16-1/8") below the bow of the
sensor or parallel to the bottom of the hull.
Note:
Do not position the bow of the sen-
sor lower than the stern because aeration
will occur.
2. To adjust the sensor's angle relative to
the hull, use the tapered plastic shim pro-
vided. If the bracket has been temporarily
fastened to the transom, remove it. Key
the shim in place on the back of the brack-
et.
2°-10° transom angle (stepped tran-
som and jet boats)
: Position the shim
with the tapered end down.
75 mm (3")
minimum beyond
swing radius
Align template vertically.
Deadrise angle
Slope of hull
Parallel to
waterline
Align template arrow with
bottom edge of transom.
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