Airmar S61 User Manual
INSTALLATION INSTRUCTIONSOWNER’S GUIDE &
Transom Mount
Speed & Temperature Sensor
Models: S61, S63
Follow the precautions below for optimal product
performance and to reduce the risk of property
damage, personal injury, and/or death.
WARNING: Always wear safety goggles and a dust
mask when installing
WARNING: When the boat is placed in the water,
immediately check for leaks around the screws and
17-032-01 rev. 02 04/12/11
any other holes drilled in the hull.
CAUTION: Never pull, carry, or hold the sensor by the
cable as this may sever internal connections.
CAUTION: Never strike the sensor.
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.
Record the information found on the cable tag for future reference.
Part No._________________Date___________
S61 with S63 with
bracket bracket
Pretest
Connect the sensor 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.
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
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).
• Designed for operation from 1–50kn (1 – 58 MPH).
• Fits transom angles from 13–20
fiberglass and aluminum boats).
For all other transom angles (including 3° transoms on jet boats
and vessels with stepped or undercut transoms) a tapered
plastic, wood, or metal shim must be fabricated.
• S63 can be snapped onto a P37, P52 or P55 transducer.
° (most powerboats and small
Tools & Materials
Safety goggles
Dust mask
Scissors
Masking tape
Electric drill
Drill bit, hole saw or spade bit for:
Bracket holes 4mm, #23 or 9/64"
Fiberglass hull only chamfer bit (preferred), 6mm or 1/4"
Transom hole (optional) 20mm or 13/16"
Cable clamp holes 3mm or 1/8"
Marine sealant (suitable for below waterline)
Screwdrivers
Putty knife
Pencil
Zip-ties
Water-based antifouling paint (mandatory in salt water)
CAUTION: Avoid mounting the sensor where the boat may be
supported during trailering, launching, hauling, or storage.
• 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.
• 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 75 mm (3") beyond the
swing radius of the propeller (see Figure 1). The starboard side
where the propeller blades are moving downward is preferred.
• Twin drive boat—Mount the sensor between the drives.
• Stepped transom—Mount the sensor on the step.
Align the
template’s fold
line with the hull
bottom and fold
under the hull
75mm (3")
min. beyond
swing radius of
propeller
Figure 1. Mounting location on single drive boat
Place on starboard (right) side of boat
◄
keel
13° transom angle
Align with bottom
edge of transom
and fold under
Figure 2. Template
20° transom angle
marine
sealant
Figure 3. Standard transom angles
marine
sealant
Installation
Mounting Directly to the Hull
CAUTION: Do not position the leading edge of the sensor lower
than the trailing edge because aeration will occur.
CAUTION: To prevent drilling too deeply, wrap masking tape
around the bit 22mm (7/8") from the point.
CAUTION: Fiberglass hull—Minimize surface cracking by
running the drill in reverse until the gelcoat is penetrated.
1. Cut-out the template printed on this page. Fold the template
along the fold-line (see Figure 2).
2. At the selected location, position the template so that the dotted
fold line is aligned with the bottom edge of the transom. Tape it
in place (see Figure 1).
3. Using a 4mm, #23 or 9/64" bit, drill two holes 22 mm (7/8") deep
at the location indicated. To prevent drilling too deeply, wrap
masking tape around the bit 1 mm (1/16") from the point.]
4. The bracket is designed for a transom angle from 13–20
Figure 3). For other transom angles, fabricate a custom shim
from plastic, an oily wood such as teak or metal (see Figure 4).
Then, mark and drill the shim.
5. Apply a marine sealant to the threads of the two #10 x 3/4" selftapping screws to prevent water seepage into the transom.
Slide a flat washer onto each screw and fasten the bracket (and
any shim) to the hull.
Do not tighten the screws completely at this time.
6. Using the vertical adjustment space on the bracket slots, slide
the sensor up or down until the bottom of the bracket is flush
with the underside of the hull. Tighten the screws.
7. Fill any gap between the sensor and the hull with marine
sealant using a putty knife for smoothing. This will ensure
smooth water flowing over the paddlewheel (see Figures 3
and 4).
Mounting to a Transducer
Install the transom mounted transducer following the instructions
provided with it. Then, insert the S63 into the guide rails on the
back of the transducer. Slide it down while squeezing the tabs
inward until the shear pins reach the bottom (see Figure 5).
Release the tabs to snap the locking pins into place.
Be sure all the pins are secure.
° (see
NO
3° transom angle
tabs
locking pins (2)
shear pins (2)
Shim required
(not provided)
shim
angle too
steep
Figure 4. Shim required
marine
sealant
guide rails
Figure 5. Installing an S63 on a transducer
2
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