Stainless steel housing in a metal hull
—A stainless steel
housing must be isolated from a metal hull to prevent electrolytic
corrosion. Slide the isolation bushing onto the housing. Apply
additional
sealant to the surfaces of the isolation bushing that will
contact the hull, filling any cavities in and around the bushing.
Installing
NOTE
: Disregard any arrow on the housing; it is not used.
1. From outside the hull, push the housing into the mounting hole
using a twisting motion to squeeze out excess sealant (Figure 5).
2. From inside the hull, slide the washer onto the housing.
Stainless steel housing in a metal hull
—Be sure the washer
contacts the hull.
Do not tighten the hull nut with the washer
against the isolation bushing, as the housing will not be firmly
installed.
If necessary, sand the isolation bushing until the
washer rests against the hull.
3. Screw the hull nut in place.
Plastic housing
—Do not clamp tightly possibly causing the
housing to fracture.
Plastic hull nut
—
Hand-tighten
only. Do not over tighten.
Metal hull nut
—Tighten with slip-joint pliers.
Cored fiberglass hull
—Do not over tighten, crushing the hull.
Wood hull
—Allow the wood to swell before tightening the hull nut.
4. Remove any excess marine sealant on the outside of the hull to
ensure smooth water flow under the sensor.
5.
All the O-rings must be intact and well lubricated to make a
watertight seal.
After the marine sealant cures, inspect the
O-rings on the insert (replace if necessary) and lubricate them
with the silicone lubricant supplied (Figure 7). Be sure the
YELLOW
O-ring is in place near the top. Also lubricate the bore
of the housing above the valve.
6. The insert must be fully inserted into the housing and the cap nut
screwed on completely to make a watertight seal (Figure 5).
Slide the insert into the housing with the arrow on the top
pointing toward the KEEL/centerline of the boat
(Figure 1).
7. Screw the cap nut several turns until the threads are engaged
(Figure 5). Being sure the arrow on the top of the insert and the
cable exit are pointing toward the keel/centerline, continue to
tighten the cap nut completely. Be careful not to rotate the
housing and disturb the sealant.
Hand tighten
only. Do not over
tighten.
8. Always attach the safety wire to prevent the insert from backing
out in the unlikely event that the cap nut fails or is screwed on
incorrectly.
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. Thread the wire through the eye a second time. Then
lead the wire through the eye in the insert. 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 one
eye in the cap nut. Thread the wire through the eye a second
time. Then lead the wire counterclockwise and through the eye
in the insert. Twist the wire securely to itself.
Installing in Housing WITHOUT Valve
To create a watertight seal in a housing that does NOT have a
valve, the insert must have a
BLACK
O-ring near the top. Use
Replacement O-ring Kit 20-519-01 and follow the instructions
supplied.
Cable Routing & Connecting
CAUTION
: If your sensor 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 waterproof connector or
cutting the cable, except when using a watertight junction box, will
void the sensor’s 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. Use grommets to prevent chaffing. To reduce
electrical interference, separate the sensor cable from other
electrical wiring and the engine. Coil any excess cable and
secure it in place with cable ties to prevent damage.
2. Refer to the instrument owner’s manual to connect the sensor to
the instrument.
Checking for Leaks
When the boat is placed in the water,
immediately
check around
the sensor 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
(page 2).
3
marine sealant on flange
Figure 5. Bedding and installing
cap nut
washer
hull
plastic housing
safety wire
housing
hull nut
insert
marine sealant on flange
stainless steel housing
metal housing
isolation
bushing
washer
and sidewall of housing
(plastic)
marine sealant on flange
cap nut
hull
safety wire
housing
insert
(plastic)
hull nut
Copyright © 2006 - 2020 Airmar Technology Corp.
KEEL
►
and sidewall of housing
and sidewall of housing
non-metal hull
metal hull
and isolation bushing where it contacts the hull
P617V
B617V
SS617V
solid fiberglass or metal hull
