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INSTALLATION INSTRUCTIONS

Thru-Hull Depth Transducer

Low Profile, Flush, and Retractable Models

WARNING: NEVER USE SOLVENTS!

Certain cleaners, fuel, paints, sealants, and other products may contain strong
solvents, such as acetone, which attack many plastics greatly reducing their strength.

1  Applications

 

Plastic housing is 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 is recommended for fiberglass or wood hulls only. Never install a
bronze housing in a metal hull, because electrolytic corrosion will occur.

 

Stainless steel housing is recommended for metal hulls to prevent electrolytic
corrosion.

 

Never install a metal housing in a vessel with a positive ground system.

2  Tools and Materials Needed

Safety goggles
Dust mask
Electric drill with 10mm (3/8") or larger chuck capacity
Drill bit: 3mm 

or 

1/8"

Hole saw (see table on page 1)
Beveled countersink tool for B21, P269, and P314
Countersink tool for B119, P217, and P219
Sandpaper
Mild household detergent 

or 

weak solvent (alcohol)

File (installation in a metal hull)
Marine sealant
Additional washer for some aluminum installations
Slip-joint pliers for metal housing
Silicone grease 

or 

petroleum jelly (Vaseline 

® 

) (retractable units)

Zip-ties
Water-based antifouling paint 

(mandatory in salt wate

r)

Installation in a cored fiberglass hull:
Hole saw for hull interior: (see table on page 1)
Fiberglass cloth and resin (see page 4, #5)

or 

Cylinder, wax, tape, and casting epoxy (see page 4, #5)

IMPORTAN

T: Please read these instructions completely before proceeding

with the installation. These directions supersede any other instructions in
your instrument manual if they differ.

Summary of Contents for FI-3001

Page 1: ...0 ...

Page 2: ...1 ...

Page 3: ...2 ...

Page 4: ... 3 Boat Types 6 3 4 Fairing 7 4 Installation 7 4 1 Hole Drilling 7 4 2 Bedding 8 5 Installing 8 5 1 Checking for Leaks 9 5 2 Blanking Plug 9 5 3 Installation in a Cored Fiberglass Hull 10 6 CONNECTION TO INSTRUMENT CONTACTS 11 7 Calibration 11 8 Maintenance 11 8 1 Antifouling Paint 11 8 2 Cleaning 11 9 TECHNICAL DATA 12 ...

Page 5: ...in a vessel with a positive ground system 2 Tools and Materials Needed Safety goggles Dust mask Electric drill with 10mm 3 8 or larger chuck capacity Drill bit 3mm or 1 8 Hole saw see table on page 1 Beveled countersink tool for B21 P269 and P314 Countersink tool for B119 P217 and P219 Sandpaper Mild household detergent or weak solvent alcohol File installation in a metal hull Marine sealant Addit...

Page 6: ...ose a location where The water flowing across the hull is smoothest with a minimum of bubbles and turbulence especially at high speeds The transducer will be continuously immersed in water The transducer beam is unobstructed by the keel or propeller shaft s There is a minimum deadrise angle There is adequate headroom inside the vessel for the height of the housing tightening the nuts and removing ...

Page 7: ... the side of the hull where the propeller is moving downward Outboard and I O Mount just forward of the engine s Inboard Mount well ahead of the propeller s and shaft s Step hull Mount just ahead of the first step Boat capable of speeds above 25kn 29MPH Review the installation location and operating results of similar boats before proceeding Fin keel sailboat Mount to the side of the centerline an...

Page 8: ...r safety goggles and a dust mask 1 Drill a 3 mm or 1 8 pilot hole from inside the hull If there is a rib strut or other hull irregularity near the selected mounting location drill from the outside Note If the pilot hole is drilled in the wrong location drill a second hole in a better location Apply masking tape to the outside of the hull over the incorrect hole and fill it with epoxy 2 Using the a...

Page 9: ...ull push the housing into the mounting hole using a twisting motion to squeeze out excess sealant see Figure 2 2 Slide the washer onto the housing inside the hull Aluminum hull less than 6mm 1 4 thick Use an additional washer Never use bronze since electrolytic corrosion will occur 3 Screw the hull nut in place Hand tighten only Do not over tighten 4 Remove the excess sealant on the outside of the...

Page 10: ...several days When the boat is placed in the water immediately check around the thru hull transducer for leaks Note that very small leaks may not be readily observed It is best not to leave the boat in the water for more than 3 hours before checking it again If there is a small leak there may be considerable bilge water accumulation after 24 hours If a leak is observed repeat Bedding and Installing...

Page 11: ...rial can be very soft Apply only light pressure to the hole saw after cutting through the inner skin to avoid accidentally cutting the outer skin 4 Remove the plug of core material so the inside of the outer skin and the inner core of the hull is fully exposed Sand and clean the inner skin core and the outer skin around the hole Caution Always completely seal the hull to prevent water seepage into...

Page 12: ...must be coated with anti fouling paint Use water based antifouling paint only Never use ketone based antifouling paint since ketones can attack many plastics possibly damaging the transducer Apply antifouling paint every 6 months or at the beginning of each boating season 8 2 Cleaning Aquatic growth can accumulate rapidly on the transducer s surface reducing its performance within weeks Clean the ...

Page 13: ...ft Power supply 12V DC 10 16V Power consumption 0 2 W Depth range 0 8 150 m 3 450 ft at speed up to 30 knots Accuracy 0 1 Type of transducer Piezocrystal 200 kHz Temperature range Operation 10 C to 70 C Storage 35 C to 85 C The depth measuring is based on the echos speed in water which is 1 463 m sec ...

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