Airmar P58 User Manual
INSTALLATION INSTRUCTIONSOWNER’S GUIDE &
Transom-Mount, TRIDUCER® Multisensor
with Integral Release Bracket
U. S. Patents: 5,606,253; 5,719,824
WARNING: Always wear safety goggles and a dust
mask when installing to prevent personal injury.
WARNING: When the boat is placed in the water,
immediately check for leaks around the screws and
any other holes drilled in the hull.
CAUTION: Never pull, carry, or hold the transducer by
17-404-01 rev. 04 12/14/10
the cable as this may sever internal connections.
CAUTION: Never strike the multisensor with anything
except the palm of the hand. Never strike the paddlewheel.
CAUTION: Never use solvents. Cleaners, fuel, paint,
sealants, and other products may contain strong
solvents, such as acetone, which attack many plastics
greatly reducing their strength.
IMPORTANT: Please read the instructions completely
before proceeding with the installation. These
instructions supersede any other instructions in your
instrument manual if they differ.
Applications
• Not recommended for boats with large inboard engine(s)
• Not recommended for stepped transoms, as multisensor will be
difficult to adjust
• Good operation up to 44kn (50MPH)
• Vertically orients sound beam on hull with deadrise angle up to 22°
• Adjusts to transom angles from 2° –22°
• Requires 89mm (3-1/2") of headroom to install
• Bracket protects multisensor from frontal impact only
Tools & Materials
Safety goggles
Dust mask
Screwdrivers
Pencil
Electric drill
Drill bits:
Bracket holes 4mm, #23, or 9/64"
Transom hole (optional) 18mm, 11/16", or 3/4"
Cable clamp holes 3mm or 1/8"
Masking tape
Angle finder
Marine sealant (suitable for below waterline)
Straight edge
Grommets (some installations)
Cable ties
Water-based anti-fouling paint (mandatory in salt water)
Model P58
21mm or 13/16"
24 mm or 15/16" or 1" (Raymarine only)
(Furuno only)
Record the information found on the cable tag for future reference
Part No._________________ Date___________ Frequency__________
Mounting Location
CAUTION: Do not mount in an area of turbulence or bubbles:
near water intake or discharge openings; or behind strakes,
struts, fittings, or hull irregularities
CAUTION: Avoid mounting the multisensor where the boat may
be supported during trailering, launching, hauling, or storage.
• For the best performance, the multisensor must be in contact
with smooth water. To identify an area of “clean” water, observe
the water flow off the transom while the boat is underway.
• Allow headroom space above the bracket for it to release and
rotate the multisensor upward (see Figure 1).
• Mount the multisensor as close to the centerline (keel) of the
boat as possible to ensure the sensor remains in the water
when the boat is turning.
• Single drive boat—Mount at least 75mm (3") beyond the
swing radius of the propeller (see Figure 2). The starboard
side where the propeller blades are moving downward is
preferred.
• Twin drive boat—Mount the multisensor between the drives.
minimum
headroom
Figure 1. Headroom required on a stepped transom
Figure 2. Mounting location on single drive boat
Copyright © 2004 - 2010 Airmar Technol ogy Corp.
Copyright © 2004 Airmar Technol ogy Corp.
89mm (3-1/2")
NOTE: Starboard
side of hull where
propeller blades are
moving downward is
preferred.
75 mm (3")
minimum beyond
swing radius
pivot post (2)
slot (2)
nuts
bracket
recess (2)
Figure 3. Attaching the bracket to the multisensor
Copyright © 2004 Airmar Technol ogy Corp.
Pretest Speed & Temperature Functions
Connect the multisensor to the instrument and spin the paddlewheel. Check for a speed reading and the approximate air
temperature. If there is no reading(s) or it is inaccurate, check the
connections and repeat the test. If there is still no reading(s) or it
is inaccurate, return the product to your place of purchase.
Installation
Attaching the Bracket to the Multisensor
1. Insert the multisensor’s pivot posts into the recesses on the
sides of the bracket (see Figure 3).
2. Press the two nuts into the slots in the back of the bracket.
3. Align the holes in the multisensor, bracket, and nuts. Insert the
two machine screws capturing the nuts. Tighten the machine
screws until the multisensor will stay in the “up” (released)
position unaided.
Hole Drilling
CAUTION: To prevent drilling too deeply, wrap masking tape
around the bit 22mm (7/8") from the point.
Fiberglass hull—Minimize surface cracking by running the drill in
reverse until the gelcoat is penetrated.
1. At the selected location, position the multisensor, so it projects
3mm (1/8") below the bottom edge of the transom (see Figure 4).
2. Being sure the bottom of the multisensor is parallel to the
waterline, mark the location of the screw holes with an “X” in the
center of the two outer most slots.
3. Using a 4 mm, #23, or 9/64" drill bit, drill two holes 22mm (7/8")
deep at the locations indicated.
20kn (28 MPH), install the bracket with both
the 9° and 4.5° shims, taper down (see Figure
5). Install the 4.5° shim against the transom
machine
screw (2)
after shaving the interfering portion of the rails
and lower bump. Place the 9° shim and
bracket assembly on top.
• Small aluminum and fiberglass boats
(20° transom angle)—Use the 9° shim with
the taper up. If your boat is capable of
speeds above 20kn (28MPH), install the
bracket with the 4.5° shim, taper up.
• Deadrise angles greater that 16°—The
hull projection will be zero.
• If you are unsure about using the shim(s)
Experiment with the shims by following the
instructions “Mounting & Adjusting.”
Mounting & Adjusting
CAUTION: Do not position the leading edge of the multisensor
lower than the trailing edge because aeration will occur.
CAUTION: Do not position the sensor deeper into the water than
necessary to avoid increasing drag, spray, and water noise and
reducing boat speed.
1. Apply marine sealant to the threads of two, #10 x 1-1/4", selftapping bracket screws to prevent water seepage into the
transom. Be sure the nuts are in the slots in the back of the
bracket and any shim(s) is in place (see Figure 3). Screw the
multisensor to the hull (see Figure 4). Do not tighten the screws
completely at this time.
2. Using a straight edge, sight the underside of the multisensor
relative to the underside of the hull (see Figure 5). The trailing
edge of the multisensor should be 1– 6 mm (1/16 –1/4") below
the leading edge.
3. Using the vertical adjustment space in the bracket slots, slide
the multisensor up or down until the bottom left corner of the
multisensor projections 0–3 mm (0 –1/8") below the bottom of
the hull (see Figure 4). When you are satisfied with the position
of the multisensor, tighten the two bracket screws.
cable cover
cable clamp
Compensating for Transom Angle—Shims
CAUTION: For boats capable of speeds above 20kn (28MPH)—
The trailing edge of the multisensor must be deeper in the water
than the leading edge. This will ensure that the paddlewheel is in
contact with the water at high speeds.
For the best performance, the transducer beam must be aimed
straight at the bottom. Since the transom of most boats is angled,
the bracket must compensate for it. Measure the transom angle of
the boat with an angle finder.
• Standard transom (13° transom angle)—The bracket is
designed for a standard 13° transom angle. The 9° shim is not
needed for this installation. If your boat is capable of speeds
above 20kn (28MPH), install the bracket with the 4.5° shim,
taper down (see Figure 5).
• Stepped transom and jet boats (3° transom angle) —Use the 9°
shim with the taper down. If your boat is capable of speeds above
2
50mm (2")
parallel to
waterline
Hull projection
0– 3mm (0– 1/8")
Figure 4. Vertical adjustment and cable routing
Copyright © 2004 Airmar Technol ogy Corp.
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