OWNER’S GUIDE & INSTALLATION INSTRUCTIONS
Thru-Hull, without Valve
Tilted Element™ Transducer
Tilt Angles: 0°, 12°, 20°
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Models: B60, B75H, B75L, B75M, B619 |
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03/16/11 |
P19, SS60, SS565, SS619 |
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U.S. Patent No. 7,369,458. UK Patent No. 2 414 077. U.S. Patent Pending |
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Follow the precautions below for optimal product |
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rev. 05 |
performance and to reduce the risk of property damage, |
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personal injury, and/or death. |
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364-01 |
WARNING: Always wear safety goggles and a dust |
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17- |
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mask when installing. |
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WARNING: Immediately check for leaks when the |
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boat is placed in the water. Do not leave the boat |
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unchecked for more than three hours. Even a small |
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leak may allow considerable water to accumulate. |
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WARNING: B619 and SS619—Do not use the spacer |
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if there is insufficient space to tighten the nut, or it is |
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within 11mm (1/2") of the top of the housing. |
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WARNING: Stainless steel housing in a metal hull— |
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Be sure the washer contacts the hull. Do not tighten |
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the hull nut with the washer against the isolation |
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bushing, as the housing will not be firmly installed. If |
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necessary, sand the isolation bushing until the washer |
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rests against the hull. |
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CAUTION: The arrow on the top of the transducer |
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must point toward the keel or centerline of the boat. |
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This will align the angle of the element inside the |
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transducer with the deadrise angle of your hull. |
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CAUTION: Never pull, carry, or hold the transducer by |
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its cable; this may sever internal connections. |
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CAUTION: Never install a metal transducer on a |
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vessel with a positive ground system. |
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CAUTION: Plastic housing—Never use a fairing with |
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a plastic housing; the protruding sensor would be |
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vulnerable to damage from impact. |
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CAUTION: Metal housing—Never install a metal |
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housing on a vessel with a positive ground system. |
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CAUTION: Stainless steel housing in a metal hull— |
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The stainless steel housing must be isolated from a |
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metal hull to prevent electrolytic corrosion. Use the |
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isolation bushing supplied. |
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CAUTION: Never use solvents. Cleaners, fuel, |
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sealants, paint, and other products may contain strong |
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solvents, such as acetone, which attack many |
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plastics, greatly reducing their strength. |
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IMPORTANT: Read the instructions completely |
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before proceeding with the installation. These |
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instructions supersede any other instructions in your |
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instrument manual if they differ. |
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Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
P19
Applications
•Plastic housing recommended for fiberglass or metal hulls only.
Never install a plastic housing in a wood hull since swelling of the wood can fracture the plastic.
•Bronze housing recommended for fiberglass or wood hulls.
Never install a bronze housing in a metal hull, because electrolytic corrosion will occur.
•Stainless steel housing compatible with all hull materials. Recommended for metal hulls to prevent electrolytic corrosion provided the stainless steel housing is isolated from the metal hull.
Match Tilt Angle of Transducer to Deadrise
Be sure the tilt angle of your transducer model matches the deadrise angle of your boat at the mounting location. The tilt angle is printed on the top of the transducer (see Figure 1). To measure the deadrise angle of your hull at the selected mounting location, use an angle finder or a digital level (see Figure 2).
•0° models—For hull deadrise angles from 0° to 7°
•12° models—For hull deadrise angles from 8° to 15° B75L-12°—For hull deadrise angles from 0° to 24° B75H-12°—For hull deadrise angles from 6° to 15° B75M-12°—For hull deadrise angles from 6° to 15°
•20° models—For hull deadrise angles from 16° to 24°
12° model |
20° model |
KEEL |
TILT |
KEEL |
TILT |
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12 O |
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20 O |
AIRMAR® |
AIRMAR® |
Figure 1. Top of transducer
Copyright © 2005 Airmar Technology Corp.
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slope of hull |
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transom view |
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deadrise angle |
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parallel to waterline |
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Figure 2. Deadrise angle of the hull
Copyright © 2005 Airmar Technology Corp.
Identify Your Model
The model name is printed on the cable tag.
Model |
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Outside Hull |
Cored Fiberglass Hull |
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Hull Material |
Hull Interior |
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(Housing) |
Hole Saw Size |
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Hole Saw Size |
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P19 |
fiberglass |
51mm or 2" |
60mm or 2-3/8" |
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metal |
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B619 |
fiberglass |
51mm or 2" |
60mm or 2-3/8" |
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SS619 |
wood |
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SS619 |
metal |
57mm or 2-1/4" |
NA |
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B60 |
fiberglass |
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SS60 |
60mm or 2-3/8" |
80mm or 3-1/8" |
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wood |
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SS56 |
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B75 |
fiberglass |
70mm or 2-3/4" |
80mm or 3-1/8" |
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wood |
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SS60 |
metal |
70mm or 2-3/4" |
NA |
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SS565 |
metal |
70mm or 2-3/4" |
NA |
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Tools & Materials
Safety goggles Dust mask
Electric drill with 10mm (3/8") or larger chuck capacity Drill bit: 3mm or 1/8"
Hole saw (see table below) Countersink tool (installing SS565) Sandpaper
Mild household detergent or weak solvent (such as alcohol) File (installation in a metal hull)
Marine sealant (suitable for below waterline) Slip-joint pliers (installing a metal housing) Grommet(s) (some installations)
Cable ties
Water-based anti-fouling paint (mandatory in salt water) Installation in a cored fiberglass hull (see page 4):
Hole saw for hull interior (see table below) Fiberglass cloth and resin
or Cylinder, wax, tape, and casting epoxy
Mounting Location
CAUTION: Do not mount near water intake or discharge openings or behind strakes, fittings, or other hull irregularities.
CAUTION: Do not mount in line with trailer rollers or bunks that may damage the transducer’s face.
large displacement hulls |
small displacement hulls |
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planing hulls |
outboard and I/O |
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stepped hull |
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fin keel sailboats |
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full keel sailboats |
Figure 3. |
Best location for transducer |
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Copyright © 2005 Airmar Technology Corp. |
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•The water flowing under the hull must be smooth with a minimum of bubbles and turbulence (especially at high speeds).
•The transducer must be continuously immersed in water.
•The transducer beam must be unobstructed by the keel or propeller shaft(s).
•Choose a location away from interference caused by power and radiation sources such as: the propeller(s) and shaft(s), other machinery, other echosounders, and other cables. The lower the noise level, the higher the echosounder gain setting that can be used.
Hull Types (see Figure 3)
•Displacement hull powerboats—Locate amidships near the centerline. The starboard side of the hull where the propeller blades are moving downward is preferred.
•Planing hull powerboats—Mount well aft, on or near the centerline, and well inboard of the first set of lifting strakes to ensure that the transducer will be in contact with the water at high speeds. The starboard side of the hull where the propeller blades are moving downward is preferred.
Outboard and I/O—Mount just forward of the engine(s). Inboard—Mount well ahead of the propeller(s) and shaft(s). Stepped 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 sailboats—Mount as close as possible to the centerline and forward of the fin keel 300–600mm (1–2').
•Full keel sailboats—Locate amidships and away from the keel.
Installation
Hole Drilling
Cored fiberglass hull—Follow separate instructions on page 4.
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.
2.Using the appropriate size outside hull hole saw, cut a hole from outside of the hull perpendicular to the hull surface (see table above).
SS565—Use a countersink tool to create a “seat” in the hull.
3.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.
Metal hull—Remove all burrs with a file and sandpaper.
Bedding
CAUTION; Be sure the surfaces to be bedded are clean and dry.
Apply a 2mm (1/16") thick layer of marine sealant around the flange of the housing that contacts the hull and up the sidewall of the housing (see Figure 4 or 5). The sealant must extend 6mm (1/4") higher than the combined thickness of the hull, washer(s), and the hull nut. This will ensure there is marine sealant in the threads to seal the hull and to hold the hull nut securely in place.
Stainless steel housing in a metal hull—To prevent electrolytic corrosion, the stainless steel housing must be isolated from the metal hull. Slide the isolation bushing onto the housing (see Figure 5). Apply additional marine sealant to the surfaces of the bushing that will contact the hull, filling any cavities in and around the isolation bushing.
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