17-
274-
01 rev. 06
07/
18/
18
Thru-Hull:
Retractable with Valve
Shorty
™
Speed
&
Temperature Sensor
Models:
S300, ST300
Patent http://www.airmar.com/patent.html
Pretest
Connect the sensor to the instrument and spin the paddlewheel.
Check for a speed reading (and the approximate air temperature if
applicable). If there is no reading(s), check all the connections
and repeat the test. If there is still no reading(s) or it is inaccurate,
return the product to the place of purchase.
Applications
• Recommended for fiberglass or metal hull only
Never install a plastic housing in a wood hull, since swelling of
the wood can possibly fracture the plastic.
• Low profile P371 recommended for cruising sailboats or planing
hull powerboats
• Flush P398 recommended for racing sailboats or high-speed
powerboats
• Minimum space required above the installed sensor: 153mm (6")
• Accommodates hull thickness:
Minimum 6mm
(1/4")
Maximum 25mm
(1")
Tools & Materials
Safety glasses
Dust mask
Ear protection
Water based anti-fouling paint (
mandatory in salt water
)
Electric drill with minimum 10mm (3/8") chuck capacity
Drill bit
3mm
or
1/8"
Hole saw
51mm
or
2"
Countersink tool (installing P398 flush housing)
Sandpaper
Mild household detergent
or
weak solvent (such as alcohol)
File (installation in a metal hull)
Marine sealant (suitable for below waterline)
Additional washer [aluminum hull less than 6mm (1/4") thick]
Grommet(s) (some installations)
Cable ties
Installation in a cored fiberglass hull (page 3):
Hole saw for hull interior
60mm
or
2-3/8"
Fiberglass cloth and resin
or
Cylinder, wax, tape, and casting epoxy
Mounting Location
CAUTION
: Do not mount the sensor in line with or near water
intake or discharge openings; or behind strakes, fittings or hull
irregularities that may disturb the water flow.
CAUTION
: Do not mount the speed sensor directly ahead of a
depth transducer, since turbulence generated by the
paddlewheel’s rotation will adversely affect the transducer’s
performance, especially at high speeds. Mount side by side.
Turbulence-free water must flow under the paddlewheel at all
boat speeds. Choose an accessible spot inside the vessel. Allow
a minimum of 153mm (6") of headroom for the height of the
housing, tightening the nuts, and removing the insert.
low-profile
flush
Record the information found on the cable tag for future reference.
Part No.:___________________Date___________
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 glasses, a dust mask,
and ear protection when installing.
WARNING
:
The valve is not a watertight seal!
Always use the insert or the blanking plug secured
with the safety wire for a watertight seal.
WARNING
: The O-rings must be intact and well
lubricated to make a watertight seal.
WARNING
:
Always attach the safety wire to prevent
the sensor insert or blanking plug from backing out in
the unlikely event that the cap nut fails or is screwed
on incorrectly.
WARNING
: Immediately check for leaks when the boat
is placed in the water. Do not leave the boat unchecked
for more than three hours. Even a small leak may allow
considerable water to accumulate.
CAUTION
: Never pull, carry, or hold the sensor by its
cable; this may sever internal connections.
CAUTION
: Never use a fairing with a plastic housing;
the protruding sensor would be vulnerable to damage
from impact.
CAUTION
: Never use solvents. Cleaners, fuel, sealant,
paint, and other products may contain solvents that can
damage plastic parts.
IMPORTANT
:
Please read the instructions completely
before proceeding with the installation. These
instructions supersede any other instructions in your
instrument manual if they differ.
OWNER’S GUIDE & INSTALLATION INSTRUCTIONS
P371
P398
