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1. MOUNTING
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").
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 completely at this time. Follow steps 1-4 in
"How to attach the sensor to the bracket", before proceeding with
"Adjustments".
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 sensor lower than the stern because aeration
will occur.
2. To adjust the sensor's angle rela-
tive to the hull, use the tapered
plastic shim provided. If the
bracket has been temporarily fas-
tened to the transom, remove it.
Key the shim in place on the back
of the bracket.
2°-10° transom angle (stepped
transom and jet boats): Position
the shim with the tapered end
down.
19°-22° transom angle (small
aluminum and fiberglass
boats): Position the shim with the
tapered end up.
1-12
Align template vertically.
Align template arrow with
bottom edge of transom.
11º transom angle
2º-10º
NO SHIM
transom
angle
shim with
taper down
YES
YES
parallel
parallel
12º-18º transom angle
NO SHIM
YES
NO
slight
angle
angle
reversed
Deadrise angle
Slope of hull
Parallel to
waterline
19º-22º
transom
angle
shim with
taper up
YES
parallel
NO
angle too
steep
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