Single drive boat—Mount the sensor on the starboard
side at least 75 mm (3") beyond the swing radius of the
propeller (see Fig. 3).
Twin drive boat—Mount the sensor between the drives.
IMPORTANT! Do not mount in an area of turbu-
lence or bubbles:
- Near water intake or discharge openings
- Behind strakes, struts, fittings, or hull irregulariti-
es
- Behind eroding paint (an indication of turbulen-
ce)
IMPORTANT! Avoid mounting the sensor where
the boat may be supported during trailering,
launching, hauling, or storage.
Installation
Attaching the Transducer to the Bracket
1.
Insert the transducer's pivot posts into the slots in the
back of the bracket (see Fig. 4).
2.
With the screw holes aligned, rotate the transducer until
it snaps onto the bracket.
Marking and Hole Drilling
1.
At the selected location on the starboard side of the hull,
position the sensor, so the bottom left corner of the trans-
ducer projects 3 mm (1/8") below the bottom edge of the
transom (see Fig. 5).
2.
Be sure the bottom of the transducer is parallel to the wa-
terline. Using a pencil, trace the bottom of the bracket
and both corners onto the hull.
3.
Remove the transducer and hold the shim against the
outline you have drawn. Mark an "X" in the center of
each slot for the screw holes.
WARNING! Always wear safety goggles and a
dust mask.
4.
Using a 4 mm, or 9/64" drill bit, drill two holes 22 mm (7/
8") deep at the locations indicated. To prevent drilling too
deeply, wrap masking tape around the bit 22 mm (7/8")
from the point.
Fiberglass hull—Minimize surface cracking by chamfer-
ing the gelcoat. If a chamfer bit or countersink bit is not
available, start drilling with a 6 mm or 1/4" bit to a depth
of 1 mm (1/16").