Airmar Shorty™ Transducers—P6 - Manual (Page 4)

4
3. From inside the hull, use a 60mm or 2-3/8" hole saw, to cut
through the inner skin and most of the core. The core material
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.
5. If you are skilled with fiberglass, saturate a layer of fiberglass
cloth with a suitable resin and lay it inside the hole to seal and
strengthen the core. Add layers until the hole is the correct
diameter.
Alternatively, a hollow or solid cylinder of the correct diameter
can be coated with wax and taped in place. Fill the gap between
the cylinder and hull with casting epoxy. After the epoxy has set,
remove the cylinder.
6. Sand and clean the area around the hole, inside and outside, to
ensure that the sealant will adhere properly to the hull. If there is
any petroleum residue inside the hull, remove it with either mild
household detergent or a weak solvent (alcohol) before sanding.
7. Proceed with “Bedding” and “Installing” on page 2.
Maintenance, Parts & Replacement
Antifouling Paint
Surfaces exposed to salt water must be coated with antifouling
paint. Use water-based antifouling paint only. Never use ketone
based antifouling paint, since ketones can attack many plastics
possibly damaging the transducer. Reapply antifouling paint every
6 months or at the beginning of each boating season.
Retractable Models—Paint the following surfaces:
• Outside wall of the insert below lower O-ring and exposed end
• Bore of the housing up 30mm (1-1/4”)
• Exterior flange of the housing
• Blanking plug below the lower O-ring including the exposed end
Retractable Models
Using the Blanking Plug
CAUTION: Do not remove the screws on the top of the
transducer.
To protect the insert, use the blanking plug:
• When the boat will be kept in salt water for more than a week.
• When the boat will be removed from the water.
• When aquatic growth buildup on the insert is suspected due to
inaccurate readings from the instrument.
1. The O-rings must be intact and well lubricated to make a
watertight seal. On the blanking plug, inspect the O-rings
(replace if necessary) and lubricate them with the silicone
lubricant supplied or petroleum jelly (Vaseline®) (see Figure 3).
2. Remove the transducer insert from the housing by removing the
safety wire from the cap nut (see Figure 2). Unscrew the cap nut.
This will jack the insert out of the housing, removing the cap nut
and insert as a single unit.
3. With the blanking plug ready in one hand, pull the transducer
insert out. Rapidly replace it with the blanking plug. Seat it into
place with a pushing twisting motion until the key fits into the
notch in the housing (see Figure 3). With practice, only 250ml
(10oz.) of water will enter the boat. Screw the cap nut in place
and hand-tighten only. Do not over tighten.
4. Reattach the safety wire to prevent the blanking plug from
backing out in the unlikely event that the cap nut fails or is
screwed on incorrectly (see Figure 2).
Winterizing
After the boat has been hauled for winter storage, remove the
blanking plug to let the water drain away before reinserting it. This
will prevent any water from freezing around the blanking plug,
possibly cracking the plastic.
Cleaning
Aquatic growth can accumulate rapidly on the transducer’s face,
reducing its performance within weeks. Clean it using a Scotch-
Brite® scour pad and mild household detergent, being careful to
avoid making scratches. If the fouling is severe, lightly wet sand
the surface with fine grade wet/dry paper.
Replacement Transducer & Parts
The information needed to order a replacement Airmar transducer is
printed on the cable tag. Do not remove this tag. When ordering,
specify the part number, date, and frequency in kHz. For convenient
reference, record this information on the top of page one.
Lost, broken, and worn parts should be replaced immediately.
Obtain parts from your instrument manufacturer or marine dealer.
Gemeco Tel: 803.693.0777
(USA) Fax: 803.693.0477
Email: [email protected]
Airmar EMEA Tel: +33.(0)2.23.52.06.48
(Europe, Middle East, Africa) Fax: +33.(0)2.23.52.06.49
Email: [email protected]
Model
Housing
& Nut
Rubber
Washer
Hull
Nut
Cap
Nut
O-Rings
Blanking
Plug
P6, P7 — 09-452 04-004 — — —
P8 retractable 33-360-01 09-452 04-004 04-011 33-519-01 20-291-01
P208 retractable 33-468-01 09-452 04-004 04-011 33-519-01 20-291-01
AIRMAR
®
TECHNOLOGY CORPORATION
35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA
www.airmar.com
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