15
3. From inside the hull, check to be sure the notch in the housing is pointing
forward toward the bow area (Figure 7). Slide the washer onto the housing
(Figure 4).
Stainless steel housing in a metal hull
—Be sure the washer contacts the hull
(Figure 5).
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.
4. Screw the hull nut in place.
Plastic housing
—Do not clamp tightly on the wrench flats, fracturing the
housing.
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 nut.
5. Remove any excess marine sealant on the outside of the hull to ensure smooth
water flow under the sensor.
Figure 7. Align arrow on insert cap, key on insert, notch in housing,
Copyright © 2017 Airmar Technology Corp
insert
housing
and arrow on flange to face forward toward bow area
arrow
key
notch
arrow
(under cap nut)
yellow
small
O-ring
O-ring
(under cap nut)