10
Transom Transducer Installation
2.
Hold
mou
to th
rib
4.
Make sure that the drill bit is perpendicular to the actual surface of the
transom, NOT parallel to the ground, before you drill. Using a 5/32” bit, drill
the two holes only to a depth of approximately 1”.
NOTE:
On fiberglass hulls, it is best to use progressively larger drill bits to reduce
the chance of chipping or flaking the outer coating.
Assemble the Transducer and Initial Mounting
In this procedure, you will assemble the transducer using the hardware provided,
then mount it and make adjustments to its position without locking it in place.
NOTE:
You will initially assemble the transducer and the mounting bracket by matching
the two ratchets to a numbered position on the transducer knuckle. Further adjustments
may be necessary.
1a. If you already know your transom angle, refer to the chart below for the
initial position to use to set the ratchets (Figure 15). If your transom is
angled at 14 degrees (a common transom angle for many boats) use
position 1 for the ratchets. In either case, go to step 2.
or...
1b. If you do not know your transom angle,
measure it using a plumb line (weighted
nylon string or monofilament line)
exactly 12 inches long. Hold the top of
the plumb line against the top of the
transom with your finger, and wait until
the line hangs straight down (Figure
16). Using a ruler, measure the distance
from the
bottom
of the plumb line to
the back of the transom, then use the
chart (Figure 15).
12”
transom
angle in
degrees
(°)
measured distance(X)
Measuring the Transom Angle
plumb
line
weight
Figure 16
Figure 15
-2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Transom Angle (°)
Bead Alignment
Number
1
4
2
5
3
1
4
2
5
25 26 27
3
28 29 30
1
Measured Distance (x)
1.1cm
1/2“
0.0 cm
0“
2.5 cm
1“
4.3 cm
1 5/8“
5.9 cm
2 3/8“
7.6 cm
3“
9.3cm
3 5/8“
11.1cm
4 3/8“
12.9cm
5“
14.9cm
5 7/8“
16.9cm
6 5/8“
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.
PiranhaMAX_Manual_532273-1EN_A.qxp:Layout 1 4/18/14 11:34 AM Page 10
