OWNER’S GUIDE & INSTALLATION INSTRUCTIONS
Transom-Mount Transducer
or TRIDUCER® Multisensor
with Integral Release Bracket
Model P66
U. S. Patents: 5,606,253; 5,719,824
12/14/10
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WARNING: Always wear safety goggles and a dust |
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mask when installing to prevent personal injury. |
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WARNING: When the boat is placed in the water, |
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immediately check for leaks around the screws and |
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any other holes drilled in the hull. |
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CAUTION: Never pull, carry, or hold the transducer by |
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the cable as this may sever internal connections. |
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CAUTION: Never strike the multisensor with anything |
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except the palm of the hand. Never strike the paddlewheel. |
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CAUTION: Never use solvents. Cleaners, fuel, paint, |
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sealants, and other products may contain strong |
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solvents, such as acetone, which attack many plastics |
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greatly reducing their strength. |
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IMPORTANT: Please read the instructions completely |
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before proceeding with the installation. These |
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instructions supersede any other instructions in your |
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instrument manual if they differ. |
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
TRIDUCER ® multisensor
Transducer 
Angle finder
Marine sealant (suitable for below waterline) Screwdrivers
Straight edge Pencil
Grommet(s) (some installations) Cable ties
Water-based anti-fouling paint (mandatory in salt water)
Mounting Location
CAUTION: Do not mount in an area of turbulence or bubbles: near water intake or discharge openings; behind strakes, struts, fittings, or hull irregularities
CAUTION: Avoid mounting the sensor where the boat may be supported during trailering, launching, hauling, or storage.
Applications
•Not recommended for boats with large inboard engine(s)
•Not recommended for stepped hull
•Good operation up to 44kn (50MPH)
•Vertically orients sound beam on hull with deadrise angle up to 30°
•Adjusts to transom angles from 2°–22°
•Bracket protects sensor from frontal impact only
Tools & Materials
Safety goggles |
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Dust mask |
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Scissors |
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Masking tape |
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Electric drill |
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Drill bits: |
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Bracket holes |
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4mm, #23, or 9/64" |
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Transom hole (optional) |
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21mm or 13/16" |
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Cable clamp holes |
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3mm or 1/8" |
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min.: 127mm (5") |
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max. no speed sensor: |
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headroom |
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191mm (7-1/2") |
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max. with speed sensor: |
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213mm (8-1/2") |
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Figure 1. Headroom required on a stepped transom |
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Copyright © 2003 Airmar Technology Corp. |
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•For the best performance, the sensor 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 sensor upward (see Figure 1).
•Mount the sensor 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 sensor between the drives.
NOTE: Starboard side of hull where propeller blades are moving downward is preferred.
75 mm (3") minimum beyond swing radius
Figure 2. Mounting location on single drive boat
Copyright © 2003 Airmar Technology Corp.
Figure 3. Template
for starboard side of boat
Drill at locations labeled “B” for transom angles 16° through 22°
(most small aluminum boats)
B |
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B |
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B |
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A |
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Drill at locations labeled “A” for transom angles 2° through 15°
(most boats)
Align arrow with bottom of transom
parallel to waterline
Align template vertically |
slope of hull |
waterline |
parallel to waterline |
align template arrow with |
bottom edge of transom |
Figure 4. Template position |
Copyright © 2003 Airmar Technology 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
CAUTION: Install the bracket before attaching the sensor.
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.Cut out the template (see Figure 3).
2.At the selected location on the starboard side of the hull, position the template, so the arrow at the bottom is aligned with the bottom edge of the transom (see Figure 4). Being sure the template is parallel to the waterline, tape it in place.
3.Using a 4mm, #23, or 9/64" bit, drill three holes 22mm (7/8") deep at the locations indicated.
Compensating for the Transom Angle—Shim
CAUTION: For boats capable of speeds above 20kn (28MPH)—The trailing edge of the sensor 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 shim is NOT needed for this installation. Go to "Mounting the Bracket."
•Stepped transom and jet boats (3° transom angle) —Use the shim with the taper down.
•Small aluminum and fiberglass boats (20° transom angle)—Use the shim with the taper up.
•If you are unsure about using the shim—Experiment with the shim. Follow the instructions: “Mounting the Bracket”, “Attaching the Senor to the Bracket”, and “Checking the Angle and Projection.”
bracket |
screw |
size actual |
slope |
of hull |
38mm (1-1/2") |
Figure 5. Distance between |
corner of bracket and |
bottom of transom |
Copyright © 2003 Airmar Technology Corp. |
2 |
self-tapping |
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screw |
screws |
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mounting ears |
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(self-tapping |
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size actual |
#6 x 5/8") |
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in |
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speed |
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h |
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cover |
sensor |
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tab in slot |
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cover |
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flush with |
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housing |
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transducer |
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insert screw- |
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housing |
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driver here to |
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remove cover |
Figure 6. Speed sensor or blank |
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Figure 7. Cover |
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(some installations) |
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(some installations) |
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Copyright © 2003 Airmar Technology Corp. |
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Copyright © 2003 Airmar Technology Corp. |
closed
opened
Figure 8. Bracket
retaining cover
Copyright © 2003 Airmar Technology
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