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Manual abstract: user guide STANDARD HORIZON B260INSTALL GUIDE
Detailed instructions for use are in the User's Guide.
[. . . ] · Orients the sound beam straight down by mounting the transducer parallel to the water surface · Minimizes aerated water flowing over the transducer's face by mounting it deeper in the water
Tools & Materials
Safety goggles Dust mask Electric drill Drill bits: Pilot hole 3mm or 1/8" B45, B46, SS505 22mm or 7/8" B240, B260, B261, SS560 33mm or 1-5/16" B256 30mm or 1-3/16" Sandpaper Mild household detergent or weak solvent (alcohol) File (installation in a metal hull) Fairing (mandatory for SS505 and SS560) Digital level or bubble level & protractor (installation w/ fairing) Band saw or hand saw (installation with a fairing) Rasp or power tool (installation with a fairing) Marine sealant Slip-joint pliers Zip-ties Water-based antifouling paint (mandatory in salt water) Installation in a cored fiberglass hull: (see page 4) Drill bit for hull interior: B45, B46, SS505 35mm or 1-3/8" B240, B260, B261, SS560 42mm or 1-5/8" B256 40mm, 41mm, or 1-5/8" Cylinder, wax, tape, and casting epoxy
Airmar Polymer Fairing
Made of a high-impact polymer with an integrated cutting guide, an Airmar fairing is safer and easier to cut with a band saw and shape with hand tools than custom fairings. It can be shaped to accommodate a deadrise angle of up to about 25°. (For fairing part numbers, see "Replacement Parts" on page 4. ) A backing block is mounted inside the hull to provide a level surface for the hull nut to seat against (see Figure 2). It is fabricated matching the interior deadrise angle of the boat. [. . . ] Step-hull--Mount just ahead of the first step. Boat capable of speeds above 25kn (29MPH)--Review transducer location and operating results of similar boats before proceeding. 2
hull nut hull backing block slope of hull fairing thickness 612mm (1/41/2") deadrise angle parallel to waterline
standard fairing
marine sealant
Figure 2. fairing shown)
AIRMAR
band saw table cutting guide
®
4. If a fairing is used, seat the transducer firmly in/against the fairing with a pushing twisting motion. Apply a 2mm (1/16") thick layer of marine sealant to the surface of the fairing that will contact the hull. Apply a 2mm (1/16") thick layer of marine sealant to the surface of the backing block that will contact the hull
deadrise angle fence arrow end for installation on port side
Installing
1. From outside the hull, thread the cable through the mounting hole. With the fairing in place (if used) and the arrow pointing forward toward the bow, push the stem of the transducer through the mounting hole (see Figure 4). (A symmetrical fairing can be oriented either way. ) Take care to align the assembly parallel to the centerline of the boat. From inside the hull, slide the backing block (if used) and hull nut onto the cable. Seat the backing block against the hull. Screw the hull nut in place and tighten it with slip-joint pliers (see Figure 2 or 5). Remove any excess marine sealant on the outside of the hull and fairing to ensure smooth water flow over the transducer.
Figure 3. Cutting the standard fairing
Cutting the Fairing
High-performance fairing--For your safety it is mandatory to follow the Installation Instruction Supplement that comes with the fairing. Measure the deadrise angle of the hull at the selected location using a digital level, or bubble level and protractor (see Figure 2) 2. Tilt the band saw table to the measured angle and secure the cutting fence (see Figure 3). Place the fairing on the table so the cutting guide rests against the fence. The arrow will be pointing toward you for installation on the port side and away from you for installation on the starboard side of the boat (see Figures 3 and 4). Caution: The ARROW always points forward toward the bow. (A symmetrical fairing can be oriented either way. ) Be sure to orient the fairing on the band saw so the angle cut matches the intended side of the hull and not the mirror image.
4. The fairing must be between 612mm (1/41/2") at its thinnest dimension (see Figure 2).
Warning: Always wear safety goggles and a dust mask. [. . . ] After the epoxy has set, remove the cylinder. Sand and clean the area around the hole, inside and outside, to ensure that the sealant will adhere properly to the hull. SS505 shown
Maintenance & Replacement
Cleaning
Aquatic growth can accumulate rapidly on the transducer's surface reducing its performance within weeks. Clean the surface with a soft cloth and mild household detergent. [. . . ]
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