Humminbird Piranha 1 - Manual

I-1
T wo components need to be installed on the boat: the transducer
and the control head. The control head displays sonar informa-
tion, the transducer sends and receives sonar signals into the
water. Proper installation of each insures best performance of the
Piranha and provides the greatest enjoyment and functionality.
Due to the wide v ariety of boats only general instructions
are presented in this installation guide. Each boat has
unique characteristics that need to be evaluated.
INSTALLING THE TRANSDUCER
STEP 1: DETERMINE TRANSDUCER LOCA TION
Consider the follo wing to find the best location on the transom:
Choose an area free of turbulent water.
• Turbulence is generated as the boat moves through the
water and is confined to area aft of ribs, strakes and
rivet lines on the bottom of hull. Choose a location on
the transom where the hull forward of this location is
smooth, flat and free of protrusions or ribs.
• Turbulence is also created by the prop - try to keep at
least 380mm (15") from the prop(s).
• The best method to locate areas free of turbulence is
to watch the transom while the boat is moving. For best
high-speed performance this is recommended. Have
an assistant pilot the boat and use caution!
• Stepped hulls require the transducer be mounted on
the step if possible. Never mount the transducer on the
transom behind the step.
• If propellers are forward of the transom, clear water
may be impossible to find. A different transducer or
mounting method should be considered, (see optional
inside hull instructions below).
• The mounting area must be in contact with the water
when the boat is on plane.
• If the boat is trailered, make sure that the transducer is
not inline with trailer bunks or roller assembles that
could damage the transducer during loading
operations.
STEP 2: FOR TRANSOM MOUNTING: DRILL THE
MOUNTING HOLES
1. Remove the mounting template from the last page of
Operation Section (Page O-15). This template provides
a means of locating the two mounting holes which
must be drilled.
2. Hold the template on the transom of the boat in the
location where the transducer will be installed. Align
the template vertically with the inside arrow of the
template on the deadrise where the bottom of the hull
meets the transom wall. (Figure 3 ).
3. Using a pencil or punch, mark the location of the two
mounting holes on the transom.
4. Using a 4mm ( ⁵⁄₃₂ ") bit, dr ill the two holes to a depth of
approximately 25mm (1"). On fiberglass hulls, it is best
to start with a smaller bit and use progressively larger
drill bits to reduce the chance of chipping or flaking the
outer coating.
PIRANHA I & 2 INSTALL GUIDE
Y ou will need: Hand drill and various bits, Phillips #2 & 3
drivers, pencil, silicone sealant (for drilled holes), 2-part,
slow cure epoxy for inside hull transducer mounting, 12v
DC power supply, 1 ampere fuse.
15" 15"
Figure 1. Mounting locations include transom and inside hull.
Turbulence
Figure 2, Location of turbulence
DO NOT LET DEADRISE
INTERSECT THIS LINE
PLACE EITHER CORNER ON DEADRISE ANGLE
TOP Use 5/32" drill bit
Drill Drill
PLACE EITHER ARROW
ON DEADRISE ANGLE
TOP
Use 5/32" drill bit
Drill Drill
Level
Figure 3