Airmar ST600 Owner's Manual

OWNER' S GUIDE & INSTALLATION INSTRUCTIONS
Thru-Hull Speed & Temperature Sensor
with Valve
Model ST600
U.S. Patents: 4,898,029; 5,186,050. Australian Patent 605,281.
Canadian Patent 1,313,775. Japanese Patent 1851014
IMPORTANT: Please
completely before proceeding with the installation.
These directions supersede any other instructions in
your instrument manual if they differ.
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.
Applications
• Plastic housing recommended for fiberglass or metal hulls only.
Never install a plastic thru-hull sensor in a wood hull, since
swelling of the wood may overstress the plastic causing a
fracture.
• Bronze housing recommended for wood or fiberglass hulls only.
Never install a bronze housing in a metal hull because electrolytic
corrosion will occur.
• Never install a metal housing in a vessel with a positive ground
system.
Tools and Materials
Water based or mineral spirits based anti-fouling paint
(mandatory in salt water)
Safety goggles
Dust mask
Electric drill with 10mm (3/8") or larger chuck capacity
Drill bit:
Hole saw:
Sandpaper
Mild household detergent or weak solvent (alcohol)
Marine sealant
Additional washer (some installations)
Slip-joint pliers for metal housing
Zip-ties
Installation in a cored fiberglass hull (see page 3)
Hole saw for hull interior: 60mm or 2-3/8"
Fiberglass cloth and resin
or Cylinder, wax, tape, and casting epoxy
Preparation
Pre-Installation Test
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 or it is inaccurate, return the instrument to your
place of purchase.
read these instructions
3mm or 1/8"
51mm or 2"
Anti-fouling Paint
Marine growth can accumulate rapidly on the sensor's surface
reducing performance within weeks. Surfaces exposed to salt
water must be coated with anti-fouling paint. Use water based or
mineral spirits based anti-fouling paint only. Never use ketone
based anti-fouling paint, since ketones attack many plastics
possibly damaging the sensor.
It is easiest to apply anti-fouling paint before installation, but allow
sufficient drying time. Reapply paint every 6 months or at the
beginning of each boating season. Paint the following surfaces
(see Figure 1):
• Outside wall of paddlewheel insert below lowest O-ring
• Paddlewheel cavity
• Paddlewheel
• Bore of housing up 30mm (1-1/4")
• Exterior lip of housing
• Blanking plug below lowest O-ring including the exposed end
Assembly
Slide the cap nut along the cable until it rests on the top of the
paddlewheel insert. Attach the pull ring to the insert capturing the
cap nut (see Figure 2). Similarly attach the pull ring to the
blanking plug capturing the cap nut.
paddlewheel
insert
outside wall
below
lowest O-ring
paddlewheel
paddlewheel
cavity
housing
exterior lip
of housing
inside bore of
housing up 30mm (1-1/4")
Figure 1. Anti-fouling paint
paddlewheel
insert
pull
ring
cap
nut
Figure 2. Assembly