Humminbird PiranhaMAX 155 Installation And Operation Manual page 45

1. Mount the transducer so that it points straight down and so that the
transducer itself is submerged in the water (see the illustration
Portable Transducer Mount).
Portable Transducer Mount
Figure 47
2. Adjust the running angle so that the transducer is parallel to and below
the surface of the water (see the illustration Transducer Running
Angle).
3. Hand tighten the wing nut so that the transducer will not rotate.
4. Secure the transducer cable in
case of accidental release
when the boat is moving,
since a loose transducer can
cause damage to itself, your
boat, or become tangled in the
propeller. Attach the tie-down
strap to the transducer cable
around an immovable object
such as a rail or fitting, as
shown in the illustration (see
the illustration Transducer Tie-
Down Strap).
5. When you have finished using the transducer, unplug the transducer
cable from the transducer jumper port on the base, then coil the cable
around the assembly.
Transducer Running Angle
Transducer Tie-Down Strap
Figure 48
37
Mounting the Portable Transducer