Chapter 2: Installation
19
Marking and Hole Drilling
1. At the selected location on the starboard side of the hull, position the
transducer, so the transducer projects 3mm (1/8") below the bottom edge
of the transom (see
Figure 2-10
).
2.
Being sure the bottom of the transducer is parallel to the waterline
, mark
the location of the screw holes with an “X” in the center of the two outer
most slots.
CAUTION:
Always wear safety goggles and a dust mask.
3. Using a 4mm, #23, or 9/64" drill bit, drill two holes 22mm (7/8") deep at
the locations indicated. To prevent drilling too deeply, wrap masking tape
around the bit 22mm (7/8") from the point.
Fiberglass hull
—Minimize surface cracking by chamfering the gelcoat.
If a chamfer bit or countersink bit is not available, start drilling with a
6mm or 1/4" bit to a depth of 1mm (1/16").
Plastic Shim
•
Standard transom
(13° transom angle)—The bracket is designed for a
standard 13° transom angle. The shim is not
needed for this installation.
Skip to
Mounting the Bracket
.
•
Stepped transom and jet boats
(3° transom angle) —Use the shim with
the tapered end
down
.
Be sure
the nuts are in the slots in the back of the
bracket before applying the shim (see
Figure 2-8
).
•
Small aluminum and fiberglass boats
(20° transom angle)—Use the
shim with the tapered end
up
.
Be sure
the nuts are in the slots in the back
of the bracket before applying the shim (see
Figure 2-8
).
•
If you are unsure about using the shim, do one of the following:
•
Measure the transom angle of your boat using a digital level or bubble
level and protractor. Then follow the instructions above for your tran-
som angle.
•
Experiment with the shim by following the instructions
Mounting
the Bracket
and
Checking the Angle and Projection
.
Mounting the Bracket
1. Apply marine sealant to the threads of two, #10 x 1-3/4", self-tapping
bracket screws to prevent water seepage into the transom.
2. Screw the transducer (with the shim if needed) to the hull (see
Figure 2-10
).
Do not tighten the screws at this time.
bereitgestellt von Busse-Yachtshop.de
Summary of Contents for DS400
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