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 as the boat moves
forward (as you're facing the stern of the boat from behind),
mount the transducer on the starboard side, and align the
bottom right corner of the mounting bracket with the bottom
of the boat. If your propeller moves counterclockwise as the
boat moves forward (as you're facing the stern of the boat
from behind), mount the transducer on the port side, and align
the bottom left corner of the mounting bracket with the
bottom of the boat.
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.
Boat Hull Types Require
Different Mounting Positions
1/8” for aluminum
1/4” for fiberglass
Figure 14
Level
Le
ve
l
Figure 13
Positioning the Mounting Bracket
Using the Mounting Bracket to
Mark the Initial Drill Holes
3rd hole
Mark Initial
Drill Holes
Figure 15
11
Transom Transducer Installation
