Transom Transducer Installation; Determine The Transducer Mounting Position - Humminbird PiranhaMAX 155 Installation And Operation Manual

Transom Transducer Installation

Following are instructions for transom mount installation. The transom mount
installation provides the least loss of signal since the transducer is mounted
outside the hull. This installation also allows adjustment of both running angle
and depth after the transducer is mounted, which enables you to tune the
installation for best results.
NOTE: If you cannot find a transom mount location that will work for your boat hull,
a different mounting technique or transducer type should be considered. See the
FAQ (Frequently Asked Questions) section of our Web site at humminbird.com or
call Customer Service at 1-800-633-1468.

Determine the Transducer Mounting Position

Turbulence: You must first determine the best location on the transom to install
the transducer. It is very important to locate the transducer in an area that is
relatively free of turbulent water. Consider the following to find the best
location with the least amount of turbulence:
Areas of Possible Turbulence
rivets strakes
transom
Figure 8
Stepped Hull
step
Figure 9
• As the boat moves through the water, turbulence
is generated by the weight of the boat and the
thrust of the propeller(s) - either clockwise or
counter-clockwise. This turbulent water is
normally confined to areas immediately aft of
ribs, strakes or rows of rivets on the bottom of
the boat, and in the immediate area of the
propeller(s). Clockwise propellers create more
turbulence on the port side. On outboard or
inboard/outboard boats, it is best to locate the
hull
transducer at least 15" to the side of the
propeller(s) (Figure 10).
• The best way to locate turbulence-free water is
to view the transom while the boat is moving. This
method is recommended if maximum high-speed
operation is a high priority. If this is not possible,
select a location on the transom where the hull
forward of this location is smooth, flat and free of
protrusions or ribs (Figure 8).
rib
7
Transom Transducer Installation