Humminbird 128 manual Step Three Drill the Mounting Holes, Step Four Run the Cables

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INSTALLATION

CONTROL HEAD INSTALLATION

and one amp fuse (not included) for the protection of the unit (Figure 21). Humminbird is not responsible for over voltage or over current failures.

In order to minimize the potential for interference with other marine electronics a separate power source (such as a second battery) may be necessary.

Step Three - Drill the Mounting Holes

1.Set the mounting bracket in place on the mounting surface. Mark the four mounting screw locations with a pencil or punch.

2.Set the mounting bracket aside, and drill the four mounting screw holes using a 9/64” (3.6mm) bit.

Step Four - Run the Cables

1.If the cables must pass through a hole underneath the mounting surface, mark and drill a 1” (25mm) hole centered between the four mounting holes (Figure 22).

Note: if the cables must pass through the mounting surface at a different location, drill the 1" (25mm) hole at that location and pass the cables through from underneath. Also, you must break out the tabs on the rear of the mounting base using needle nose pliers (Figures 24-25).

2.Insert all cables through the 1” (25mm) hole from beneath the mounting surface.

3.Pass the cables through the grommet (if the cable hole is underneath the mounting bracket) then press the grommet in place around the cables and into the 1” (25mm) hole.

4.Pass the cables through the mounting base, out the top of the mounting bracket.

5.Place the mounting bracket on the mounting surface aligned with the drilled holes. Insert the four flathead wood screws into the mounting holes and tighten fully (Figure 23).

Optional: If the cables pass outside the mounting bracket, install the hole cover over the hole and fasten in place using the two #8 x 7/8” (22mm) wood screws (Figure 24).

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Contents Page Installation Overview AccessoriesParts Supplied Determining How to Mount the Transducer Portable Mounting Alternate Transducers and Mounting MethodsTrolling Motor Mounting Thru-Hull MountingTransducer Exchange Beginning InstallationStep One Determine Where to Mount the Transducer Transom InstallationStep Three Assemble the Transducer Step Two Drill the Mounting HolesStep Four Mount the Transducer to the Transom Step Five Adjust the Running Position of the TransducerStep Six Route the Cable Step One Determine the Mounting Location Inside the Hull InstallationStep Two Test the Mounting Location Step Three Permanently Mount the Transducer Step One Determine Where to Mount Control Head InstallationStep Two Connect the Power Cable to the Boat Step Four Run the Cables Step Three Drill the Mounting HolesYour Humminbird is now ready for operation Step Five Assembling the Connector HolderTest the Installation Testing the Installation What YOU see ON-SCREEN Simulator OperationInterpreting the ON-SCREEN Information Page Control Functions Senstivity Menu FunctionsDepth Range Zoom Fish Alarm Depth AlarmFish ID Using Diagnostic