User manual STANDARD HORIZON M260 INSTALL GUIDE

[. . . ] Remove the paper backing from the adhesive side of the gasket. With the adhesive side facing the plate, align the holes and edges of the gasket with the under side of the plate (see Figure 1). Thread the cable through the cable hole in the gasket and plate. transducer Caution: Do not over-tighten the bolts. 3. Rest the plate on the transducer with the gasket side down and align the mounting holes. [. . . ] 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. active face Figure 3. Establishing a performance baseline--M260 shown 2 AIRMAR ® A B C Figure 4. Testing the transducer at the selected location--M260 shown Observe the echosounder's performance and compare it to the baseline. Look for a stable depth reading that is similar to the baseline. Compare the thickness and intensity of the bottom trace. If the performance is close to the baseline, this is a good mounting location. Remember, some energy is lost transmitting through the hull. If the test reading differs markedly from the baseline, you will need to find another location to install the transducer. Caution: Do not mark or cut the shortest side of the tank. 2. Holding a carpenter's level even with the lower corner of an angled side of the tank, draw a level line with a pencil. Repeat this process on the opposite side of the tank. Connect the two lines along the tallest side of the tank, being sure the line is level. This will be your cutting guideline. Note: If there is no reading or it is erratic, the transducer may be positioned over coring which is absorbing the acoustic energy. If no other location is available, check with the boat manufacturer to be certain coring is present. Warning: Always wear safety goggles and a dust mask. 3. Before cutting the tank, be sure the tallest side will be closest to the centerline (keel) of the boat after the tank is installed. Using a saw, cut the three sides of the tank along the guideline that you have drawn. It may be necessary to further shape the tank to the hull to ensure a liquid tight bond. The tank is provided with a cork liner to reduce sound echoes. After the tank has been cut, wrap the cork liner around the inside of the tank (see Figure 6). Butt the sides of the liner along the center of the tallest side of the tank. Note: There may be a gap between the edges which will not affect performance. [. . . ] Grasp the transducer by the handles and lower it into the tank (see Figure 8). There is no fore or aft to the transducer; it fits either way. The information needed to order a replacement Airmar transducer is printed on the cable tag. When ordering, specify the part number, date, and frequency in kHz. For convenient reference, record this information at the top of page one. AIRMAR hex-head bolt (4) fill/vent plug (2) ® Caution: Do not over-tighten the bolts to avoid cracking the tank. 5. [. . . ]