Furuno LS-6100 - Manual (Page 34)

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BOW Hole for
stuffing tube
Upper Half
Lower Half
Saw along slope
of hull.
Construction of fairing block
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 ensure watertight mounting.
5. Mount the transducer and fairing blocks
and tighten the locking nuts. Be sure
that the transducer is properly oriented
and its working face is parallel to the
waterline.
Note:
Do not over-stress the stuffing tube
and locking nuts 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.
4.3 Transom Mount
Transducer
The transom mount transducer
(520-5PWD) is very commonly employed,
usually on relatively small I/O or outboard
boats. Do not use this method on an
inboard motor boat because turbulence is
created by the propeller ahead of the
transducer.
There are two methods of installation: flush
with hull (for flat hulls) and projecting from
hull (for deep V-hulls).
Flat Hull
D
D>50 cm
Deep-V
Hull
Transom mount transducer
mounting locations
Installing the transom mount
transducer on a flat hull
A suitable mounting location is at least 50
cm away from the engine and where the
water flow is smooth.
1. Drill four pilot holes in the mounting
location.
2. Attach the transducer to the bracket with
5 x 20 tapping screws (supplied).
3. Adjust the transducer position so the
transducer faces right to the bottom.
Note:
If necessary, to improve water
flow and minimize air bubbles staying
on the transducer face, incline the
transducer about 5° at the rear. This
may require a certain amount of
experimentation for fine tuning at high
cruising speeds.
4. Fill the gap between the wedge front of
the transducer and transom with epoxy
material to eliminate any air spaces.