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Looking at the back of the transducer, the seam should be slightly below the bottom of the hull. 7. Continue to adjust until the bracket is also Leveling the Mounting Assembly Horizontally LevelLevelFigure24 level from port to starboard (horizontally level as you look at the transducer from behind the boat (Figure 24). 8. Mark the correct position on the transom by tracing the silhouette of the transducer mounting bracket with a pencil or marker. 9. Tighten the pivot bolt, using the pivot screw and nut to lock the assembly. Hand tighten only! 10. Hand-tighten the two mounting screws. NOTE: You will drill the third mounting hole and finalize the installation after you route the cable and test and finish the installation in the following procedures. 15 Transom Transducer Installation Routing the Cable The transducer cable has a low profile connector, which must be routed to the point where the control head is mounted. There are several ways to route the transducer cable to the area where the control head is installed. The most common procedure routes the cable through the transom into the boat. NOTE: Your boat may have a pre-existing wiring channel or conduit that you can use for the transducer cable. 1. Unplug the other end of the transducer cable from the control head. (The transducer cable was connected in the earlier section Attaching the Cables to the Control Head). Make sure that the cable is long enough to accommodate the planned route by running the cable over the transom. CAUTION! Do not cut or shorten the transducer cable, and try not to damage the cable insulation. Route the cable as far as possible from any VHF radio antenna cables or tachometer cables to reduce the possibility of interference. If the cable is too short, extension cables are available to extend the transducer cable up to a total of 50'. For assistance, contact the Customer Resource Center at or call 1-800-633-1468 for more information. NOTE: Allow enough slack in the cable for slight movement at the pivot point. It is best to route the cable to the side of the transducer so the transducer will not damage the cable during movement. 2a. If you are routing the cable over the transom of the boat, secure the cable by attaching the cable clamp to the transom, drilling 9/64" diameter holes for #8 x 5/8" wood screws, then skip directly to step 5 to connect the cable. or... 2b. If you will be routing the cable through a hole in the transom, drill a 5/8" diameter hole above the waterline. Route the cable through this hole, then fill the hole with marine-grade silicone sealant and proceed to the next step immediately. 16 Transom Transducer Installation RoutingtheCableFigure25 StoringExcessCableFigure26 3. Place the escutcheon plate over the cable hole and use it as a guide to mark the two escutcheon plate mounting holes. Remove the plate, drill two 9/64" diameter x 5/8" deep holes, and then fill both holes with marine-grade silicone sealant. Place the escutcheon plate over the cable hole and attach with two #8 x 5/8" wood screws. Hand tighten only! 4. Route and secure the cable by attaching the cable clamp to the transom; drill one 9/64" diameter x 5/8" deep hole, then fill hole with marine-grade silicone sealant, then attach the cable clamp using a #8 x 5/8" screw. Hand tighten only! NOTE: If there is excess cable that needs to be gathered at one location (as shown in the illustration), dress the cable routed from both directions so that a single loop is left extending from the storage location. Doubling the cable up from this point, form the cable into a coil. Storing excess cable using this method can reduce electronic interference (Figure 26). 5. Plug the cable connector back into the control head. The slots are keyed to prevent reverse installation, so be careful not to force the connector into the holder. Your control head is now ready for operation. 17 Transom Transducer Installation Test and Finish the Installation Once you have installed both the control head and the transom transducer, and have routed all the cables, you must perform a final test before locking the transducer in place. Testing should be performed with the boat in the water. 1. Press POWER once to turn the control head on. If the unit does not power up, make sure that the connector is fully plugged into the terminal slot and that power is available. 2. If all connections are correct and power is available, the Humminbird® control head will enter Normal operation. 3. If the bottom is visible on-screen with a digital depth readout, the unit is working properly. Make sure that the boat is in water greater than 2' but less than the depth capability of the unit, and that the transducer is fully submerged, since the sonar signal cannot pass through air. NOTE: The transducer must be submerged in water for reliable transducer detection. 4. If the unit is working properly, gradually increase the boat speed to test high-speed performance. If the unit functi...

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