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turbed flow of water around the transducer. The fairing block should be smaller
than the transducer itself to provide a channel to divert turbulent water around the
sides of the transducer rather than over its face.
3. Drill a hole just large enough to
pass the threaded stuffing tube of
the transducer through the hull,
making sure it is drilled vertically.
4. Apply a sufficient amount of high
quality caulking compound to the
top surface of the transducer,
around the threads of the stuffing
tube and inside the mounting hole
(and fairing blocks if used) to en-
sure watertight mounting.
5. Mount the transducer and fairing blocks and tighten the locknut. Be sure that the
transducer is properly oriented and its working face is parallel to the waterline.
Flat washer
Fairing
block
Hull
Deep-V Hull
Note: Do not over-stress the stuffing tube and locknut through excessive tightening,
since the wood block will swell when the boat is placed in the water. It is suggested
that the nut be tightened lightly at installation and retightened several days after the
boat has been launched.
Transducer preparation (for 520-5PSD/520-5MSD)
Before putting the boat in water, wipe the face of the transducer thoroughly with a de-
tergent liquid soap. This will lessen the time necessary for the transducer to have good
contact with the water. Otherwise the time required for complete "saturation" will be
lengthened and performance will be reduced.
Note: DO NOT paint the transducer. Performance will be affected.
Lower half
Rubber washer
Hull
10
Hole for
stuffing tube
Upper half
Saw along slope
of hull.
Flat washer
Rubber
washer
Flat Hull
1. MOUNTING
BOW
Cork
washer
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