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display,
the
problem
could be one of
three
things; spark plugs,
alternator,
or tachometer
wiring. Try using
resistor
spark plugs,
alternatorfilters,
or
routing
the sonar
unit's
power
cable
away
from
engine wiring. Again,
routing
the
power
cable
directly
to the
battery
helps
eliminate noise
problems.
Make certain
to use the in-line fuse
supplied
with the unit when
wiring
the
power
cable
to the
battery.
When no noise
appears
on the sonar unit after all of the
above
tests,
then
the noise source is
probably
cavitation.
Many
novices
or
persons
with
limited
experience
make
hasty
sonarinstallationswhich
function
perfectly
in shallow
water,
or when the boat
is at rest. In
nearly
all
cases,
the cause
of the
malfunction will be the location
and/or
angle
of
the transducer. The
face
of the transducer must
be
placed
in a location that
has a smooth flow
of
water at all boat
speeds.
Read
your
transducer owner's manual
forthe
best
mounting position.
WINDOWS SUMMARY
All of the window
groups
used
by
the X-
70A are shown
on the
following pages.
To view these
groups,
simply press
the
WINDOWS
key,
then
repeated press
the down arrow
key.
Thiswill
"cycle"
the
unit
through
all
groups.
Remember,
each
group
can be customized,
how-
ever the
group
will revert
to the ones
shown
on these
pages
when the unit is
turned off.
F
DEPTH (FEET)
lETEMPERATURE
cFfl
6.9
:
rnletu,,,fl,1
-
,
.
12.6
!
2.
Slip
the
transducer's
mounting
pad
between the bracket's
mounting
"ears".
Sandwich two internal lock
washers between the transducer and
one side of
the
mounting
bracket as shown
below. Place one washer on
the other side
of the transducer.
TWO
BOLT
4llll1lllllluh1llllllffluI
liii
3. Slide
the metal sleeve
over the bolt.
Slip
the
bolt and sleeve
through
the
bracket, washers,
and transducer
assembly.
Place
an internal tooth
lock washer over the end
of the bolt and thread
the nut onto it. Do not
tighten
the nut at this time.
The
transducer
is
now
ready
for installation.
INSTALLATION
-
Transom
Mount
1. The
transducer must be
placed
in
a location that has a smooth flow
S
water at all
times. Air bubbles created
by
the movement of the boat hull
against
the water
interfere with the sonar
signal.
This causes "noise"
or
random marks
to
appear
on the sonar's
display.
You
may
need to
carefully
view
the water's
path
at the transom
while the boat is
moving
to
determine the best
location for the transducer.
2. Make certain
the chosen location doesn't
interfere with the
boat's
trailer.
Mount the transducer at least
one foot from the
engine's
lower
unit. This
will
prevent
air bubbles from the
transducer
interfering
with the
propeller.
ONE WASHER
BOLT &
SLEEVE
GROUP
'A"
49.2
SHALLOW DEEP
ALARM
ALARM
a OFF
70.7
GROUP "B"
GROUP "C"
41
6
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