User manual HUMMINBIRD SHS 7

[. . . ] In addition to the hardware supplied with your transducer, you will need a powered hand drill and various drill bits, Phillips and flat head screwdrivers, a ruler or measuring tape, pen or pencil, and silicone sealant. Locating the Transducer As a boat moves through the water, turbulence is generated by the weight of the boat and the thrust of the propeller(s). This turbulent water is normally confined to areas immediately aft of ribs, strakes, or rows of rivets on the bottom of the boat, and in the immediate area of the propeller(s). It is very important to locate the transducer in an area of relatively turbulence-free water. If the propeller(s) are forward of the transom, it may be impossible to find an area clear from turbulence, and a different mounting technique should be considered. [. . . ] Align the metal mounting bracket with the mounting holes. The center slot should be above the two outer slots. (This bracket and all other hardware supplied is top quality stainless steel for maximum strength and corrosion protection). Insert the three 1" (25 mm) flat head wood screws into the drilled holes, but do not completely tighten. Assembling the Transducer Attach the pivot to the transducer body as shown in the following illustration using the two 1/4--20 x 5/8" (16 mm) machine screws, toothed washers, and square nuts. The toothed washers must fit on the inside of the transducer ears, between the pivot and the ears. The square nuts will be prevented from rotating by the pocket in the back of the pivot. An Allen wrench is provided which fits all of the 1/4--20 screws, but do not fully tighten the screws at this time. Attaching the Transducer Slide the assembled transducer into the metal bracket from the bottom, aligning the large hole at the top of the bracket with the hole in the pivot. Insert the headed pin through the pivot holes in the bracket and pivot. The headed pin can be inserted from either side of the bracket. 3 High Speed Transducer Place the nylon washer over the opposite end of the headed pin. Place the stainless washer over the 1/4--20 x 5/8" screw threads, then insert into the opposite end of the headed pin and finger tighten only. The screw has a thread locking compound on the threads to prevent loosening, and should not be fully tightened until all adjustments are made. Running Position Adjustment The running position of the transducer is now completely adjustable. Subsequent adjustment may be necessary to tweak the installation after high speed testing. The metal bracket allows height and tilt adjustment; the pivot screws allow angle adjustment. Adjust the angle of the transducer body first, so it is parallel with the hull of the boat, and fully tighten the two pivot screws using the supplied Allen wrench. Access to the pivot screws is provided by the lower holes in the side of the mounting bracket. Next, adjust the height of the assembly so the face of the transducer is 1/8" (3 mm) to 1/4" (6 mm) beneath the bottom of the transom, and fully tighten the three mounting screws. In order to gain access to the mounting screws, the transducer assembly must be pivoted up into the bracket as shown. Be careful not to alter the running angle as some force is necessary to pivot the assembly. If access to the top mounting hole is not possible due to the selected height of the transducer, fully tighten the two lower screws. Remove the headed pivot pin and the transducer assembly, tighten the top screw, and then reassemble. Finally, ensure that all mounting screws are fully tightened. Attaching the pivot to the bracket Hand Tighten Only Routing the Cable The transducer cable has a low-profile connector that must be routed to the point where the fishfinder is mounted. Every boat is different and there may be several ways to route the cable (see the illustration on the following page). [. . . ] Periodically clean the face of the transducer with liquid detergent. Pivoting the transducer up in the bracket may allow better access for inspection or cleaning. In some cases it may take some time to wet the transducer when returned to the water. Small air bubbles can cling to the surface of the transducer and can interfere with proper operation. [. . . ]