Humminbird PIRANHAMAX 160 - Manual (Page 17)

Preparing the Mounting Location
After determining the mounting location for the
transducer, follow the steps below to position and
mount the transducer bracket.
1. Make sure that the boat is level on the trailer,
both from port to starboard and from bow to
stern, by placing your level on the deck of the
boat, first in one direction, then in the other.
2. Hold the mounting bracket against the transom
of the boat in the location you have selected
(Figure 13). Align the bracket horizontally, using
the level; make sure that the lower screw hole
protrusion does not protrude past the bottom of
the hull, and there is at least 1/4" clearance
between the bottom of the bracket and the
bottom of the transom for fiberglass boats, and
1/8" clearance for aluminum boats (Figure 14).
NOTE: If you have a flat-bottomed aluminum boat, some
additional adjustment may be needed to accommodate
the rivets on the bottom of the boat (i.e. the gap may need
to be a little smaller than 1/8"). This will help you to avoid
excessive turbulence at high speeds.
NOTE: If your propeller moves clockwise (in forward, as
you're facing the stern of the boat from behind), mount
the transducer on the starboard side. If your propeller
moves counter-clockwise (in forward, as you're facing the
stern of the boat from behind), mount the transducer on
the port side.
3. Continue to hold the bracket on the transom of
the boat, and use a pencil or marker to mark
where to drill the two mounting holes. Mark the
drill holes near the top of each slot, making sure
that your mark is centered in the slot (Figure 15).
NOTE: The third hole should not be drilled until the
angle and height of the transducer is finalized, which
you will not do until a later procedure.
Level
Le
ve
l
Figure 13
Using the Mounting Bracket to
Mark the Initial Drill Holes
Mark Initial
Drill Holes Figure 15
3rd hole
1/8” for aluminum
1
Boat Hull Types Require
Different Mounting Positions
1/8” for aluminum
1/4” for fiberglass
Figure 14
Positioning the Mounting Bracket
11
Transom Transducer Installation