Uniden Clock - Manual (Page 9)

3. Mark the outline of each slot on the hull. Mark the screw locations
1/8" from the
bottom of each slot, and drill four holes 3/4" deep with
a 9/64" drill. The slots in the bracket allow 5/8" of vertical
adjustment which can be utilized to lower the transducer further
into the water to achieve optimal performance.
4. Using the sheet metal screws provided, attach and tighten the
bracket to the hull so that the transducer projects 1/8" below the
underside of the hull. A marine sealant such as RTV should be
applied to the threads of the screws to prevent water seepage into
the transom. Align the transducer so that the rear is 1/16 to 1/8"
lower than the forward point (bow). Tighten all bolts and screws.
5. Route the cable to the QT-206, being careful not to tear the cable
jacket. Make sure the cable is separated from the ignition,
tachometer, alternator, or other electrical wiring. Do not remove
the connector or splice or shorten the cable, as this will void the
transducer warranty.
Transducer Replacement/Identification Tag
On most transducers manufactured after 1987, the operating frequency
and part number is attached to the cable or is printed on a mylar tag near
the connector end. Do not remove this tag since it identifies the
transducer and will help you identify the operating frequency of the
transducer. The QT-206 operates at 200 kHz. (Incorrect frequency will
cause your instrument to operate improperly.)
Transducer Wetting
Immediately before launching your vessel, thoroughly wipe the face
of the transducer with a detergent type liquid soap. This reduces the
amount of time required for the transducer to establish good contact with
the water. If this procedure is not followed, it may take several days for
the complete “wetting” to occur, resulting in reduced performance of the
instrument.
Transducer Painting
If a vessel is kept in saltwater, especially in the southern U.S., marine
growth can accumulate rapidly on the transducer face and seriously
reduce performance. If fouling does occur, use a stiff brush or putty knife
to remove this growth. Wet sanding of the fouled transducer face is
permissible with #220 or finer grade of wet or dry emery paper. (Use
plenty of water.) Coating transducers with anti-fouling paint is often
necessary to achieve consistent performance. All anti-fouling paints
7