Installation Instructions

2
Cutting the Fairing
1. Measure the deadrise angle of the hull at the selected mounting
location using a digital level, or bubble level and protractor (see
Figure 2).
2. Tilt the band saw table to the measured angle and secure the
cutting fence (see Figure 3).
Note : Be sure to orient the fairing on the band saw so the angle
cut matches the intended side of the hull and not the mirror
image.
3. Place the fairing on the table so the cutting guide rests against
the fence. The end with the triangular recess will be pointing
toward you for installation on the port side of the boat or
pointing away from you for installation on the starboard side.
Note : The end of the fairing with the triangular recess always
points forward toward the bow when installed.
4. There is a minimum thickness for the fairing at its thinnest
dimension (see Figure 2 and Specifications Table 1).
Warning : Always wear safety goggles and a dust mask.
5. Recheck steps 1 through 4; then cut the fairing.
6. Shape the fairing to the hull as precisely as possible with a rasp
or power tool.
7. Use the remaining section of the fairing as the backing block.
Installation
Cored Fiberglass Hull —Follow separate instructions on page 4.
Caution : Never use solvents. Cleaners, fuel, paint, sealants, and
other products may contain strong solvent, such as acetone,
which attack plastics greatly reducing their strength.
Notice : Never pull, carry, or hold the sensor by the cable as this
may sever internal connections.
Drilling a Hole for the Sensor
Warning : Always wear safety goggles and a dust mask.
1. Drill a 3mm or 1/8" pilot hole perpendicular to the waterline from
inside the hull (see Figure 2). If there is a rib, strut or other hull
irregularity near the selected mounting location, drill from the
outside. (If the pilot hole is drilled in the wrong location, drill a
second hole in a better location. Apply masking tape to the
outside of the hull over the incorrect hole and fill it with epoxy.)
2. Using the appropriate size drill bit or hole saw, cut a hole from
outside the hull (see Specification Table 1).
3. Sand and clean the area around the hole, inside and outside, to
ensure that the sealant will adhere properly to the hull. If there
is any petroleum residue inside the hull, remove it with either
mild household detergent or a weak solvent (alcohol) before
sanding.
Metal hull —Remove all burrs with a file and sandpaper.
Drilling a Hole for the Anti-rotation Bolt
Dry fit the sensor to locate the hole for the anti-rotation bolt.
1.
B45, B46, B256, B260, SS505 —Remove the hull nut from the
sensor (see Figure 2).
2. Thread the sensor cable through the large hole in the fairing
and through the mounting hole in the hull. Seat the sensor
firmly in the recess in the fairing (see Figure 4).
Note : The sensor must be flush with the fairing. If it is recessed
more than 0.5mm (1/64") inside the fairing, you may carefully
file or sand the fairing flush with the sensor.
Warning : Always wear safety goggles and a dust mask.
3. Attach the appropriate size drill bit to your drill (see
Specifications Table 1). Slide the sensor’s stem with the fairing
in place into the mounting hole. (
Be sure the triangular recess in
the fairing is pointing forward toward the bow
.) While holding the
assembly in place and using the bolt hole in the fairing as your
guide, drill a hole through the hull for the anti-rotation bolt.
4. Remove the assembly and cable from the mounting hole.
5. Sand and clean the area around the hole, inside and outside, to
ensure that the sealant will adhere properly to the hull. If there
is any petroleum residue inside the hull, remove it with either
mild household detergent or a weak solvent (alcohol) before
sanding.
Metal hull —Remove any burrs around both holes with a file
and sandpaper.
Bedding the Sensor
1. Remove the sensor from the fairing.
2.
Stainless steel sensor in metal hull only —Slide the
appropriate size isolation sleeve over the cable and onto the
stem of the sensor as far down as possible (see Figure 2).
Be
sure
the top of the isolation sleeve will be below the top of the
backing block to prevent the sleeving from interfering with
tightening the hull nut.
Caution : To prevent electrolytic corrosion, never allow direct
contact between a stainless steel sensor and a metal hull!
Figure 2. SS544V with isolation sleeve
hull
aft view
min. fairing
thickness
deadrise
angle
slope of hull
parallel to
water surface
isolation
sleeve
Figure 3. Cutting the fairing
deadrise
angle
cutting
guide
cutting
band saw
table
bow end
for installation
on port side
fence
backing
block
fairing
hull nut