P319, B117, or SS555
in a
non-metal
hull
housing
hull nut
spacer
washer
hull
marine sealant on lip and
side wall of housing
into the notch.
Be careful
not to rotate the housing and disturb
the marine sealant. Screw the cap nut in place and
HAND-
TIGHTEN
only.
Do not
over tighten.
Warning
: Always attach the safety wire to prevent the
transducer insert from backing out in the unlikely event that the
cap nut fails or is screwed on incorrectly.
2. Attach the safety wire.
Plastic housing
—Attach the safety wire to one eye in the hull
nut. Keeping the wire taut throughout, lead the wire in a
counterclockwise direction and thread it through one eye in the
cap nut, the pull ring, the second eye in the cap nut, and the
second eye in the hull nut. Twist the wire securely to itself.
Metal housing
—Wrap one end of the safety wire tightly around
the housing and twist it together with the long end. Keeping the
wire taut throughout, lead the wire straight up and through the
eye in the cap nut. Loop the wire through the pull ring and twist
it securely to itself.
Cable Routing & Connecting
Caution
: If your transducer came with a connector, do not remove
it to ease cable routing. If the cable must be cut and spliced, use
Airmar’s splash-proof Junction Box No. 33-035 and follow the
instructions provided. Removing the water-proof connector or
cutting the cable, except when using Airmar’s junction box, will
void the transducer warranty.
1. Route the cable to the instrument,
being careful
not to tear the
cable jacket when passing it through the bulkhead(s) and other
parts of the boat. To reduce electrical interference, separate the
transducer cable from other electrical wiring and the engine. Coil
any excess cable and secure it in place using zip-ties to prevent
damage.
2. Refer to the echosounder owner’s manual to connect the
transducer to the instrument.
Checking for Leaks
Warning
: DO NOT leave the boat in the water unchecked for
several days.
When the boat is placed in the water,
immediately
check the
thru-hull transducer for leaks. Note that very small leaks may not
be readily observed.
Do not
leave the boat in the water for more
than 3 hours before checking it again. If there is a small leak,
there may be considerable bilge water accumulation after 24
hours. If a leak is observed, repeat “Bedding” and “Installing”
immediately
(see page 2).
Retractable Models Only
—
Blanking Plug
Warning: The O-rings must be intact and well lubricated to
make a watertight seal.
1. On the blanking plug, inspect the O-rings (replace if necessary)
and lubricate them with the silicone lubricant supplied or
petroleum jelly (Vaseline®).
2. Remove the transducer insert from the housing by removing the
safety wire and unscrewing the cap nut (see Figure 2).
3. With the blanking plug ready in one hand, pull the transducer
insert most of the way out. Remove the insert and rapidly
replace it with the blanking plug. Seat it into place with a
pushing twisting motion until the key fits into the notch in the
housing. With practice, only 250ml (10oz.) of water will enter the
boat. Screw the cap nut in place and
HAND-TIGHTEN
only.
Do
not
over tighten
3
Figure 2. Bedding and installing
with retractable insert
with retractable insert
washer
hull
pull ring
safety wire
cap nut
hull nut
washer
hull
pull ring
safety wire
cap nut (plastic)
hull nut
marine sealant on lip and
Figure 3. Bedding and installing
plastic housing
bronze or stainless steel housing
transducer insert
transducer insert
housing
housing
isolation
ring
hull
hull nut
washer
Copyright © 2006 Airmar Technology Corp.
side wall of housing
housing
Copyright © 2006 Airmar Technology Corp.
in a
non-metal
hull
(P217 shown)
(B17 shown)
marine sealant on lip and
side wall of housing
stainless steel housing in metal hull
marine sealant on lip and
side wall of housing
and isolation ring where it contacts the hull
spacer
wrench
flats
(SS555 shown)
(plastic/metal)
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