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6. I get gaps in the reading at high speeds.
Your transducer needs adjusting. If the transducer is transom-
mounted, there are two adjustments available to you—height,
and running angle. Make small adjustments and run the boat at
high speeds to determine the effect. It may take several tries to
optimize high-speed operation. This can also be a result of air or
turbulence in the transducer location caused by rivets, ribs, etc.
7. My unit loses power at high speeds.
Your Piranha has over-voltage protection that turns the unit off
when input voltage exceeds 20 VDC. Some outboard motors do
not effectively regulate the power output of the engine’s alterna-
tor and can produce voltage in excess of 20 volts when running
at high RPMs. The SureVolt power stabilizer from Humminbird
maintains a steady voltage to the unit and solves this problem.
8. The screen begins to fade out. Images are not as
sharp as normal.
Check the input voltage. The Piranha will not operate on input
voltages below 8 VDC.
9. The display shows many black dots at high speeds and
high sensitivity settings.
You are seeing noise or interference caused by one of several
sources. Noise can be caused by other electronic devices. Turn
off any nearby electronics and see if the problem goes away.
Noise can also be caused by the engine. If engine noise is caus-
ing the interference, the problem will intensify at higher RPMs.
Increase the engine speed with the boat stationary to isolate this
cause. Propeller cavitation can appear as noise on-screen. If the
transducer is mounted too close to the propeller, the turbulence
generated can interfere with the sonar signal. Ensure that the
transducer is mounted at least 15" (38cm) from the prop.
Humminbird One-Year Full Warranty
First year repairs (from original date of purchase) on your Piranha are absolutely free.
This does not include physical damage to the unit or its accessory items. Any modifica-
tion or attempt to repair the original equipment or accessories by unauthorized individ-
uals will void the warranty. Return the warranty registration card and retain your bill of
sale for warranty verification.Accessories not manufactured under the Humminbird
trade name are not covered by our warranty.
The customer is responsible
for shipping charges to Humminbird.
Humminbird will provide ground UPS
or Parcel Post shipping back to the customer free of charge.This warranty applies to
the original purchaser only.
This warranty is in lieu of all other warranties expressed or implied and no repre-
sentatives or persons are authorized to provide for any other liability in connection
with the sale of our products. Humminbird reserves the right to perform modifica-
tions or improvements on its products without incurring the obligation to install the
changes on units previously manufactured, sold, delivered, or serviced.
THIS IS A FULL WARRANTY AS DEFINED BY THE FEDERAL WARRANTY ACT, EFFEC-
TIVE JULY 4,1975.
Customer Resource Center
If you have any questions, call our Humminbird Customer Resource Center Hotline:
1-334-687-0503
Throughout the U.S. and Canada, hours are Monday-Friday, 8:00 a.m.to 5:00 p.m.
Central time. Or visit our web site:
www.humminbird.com for Product Support
and troubleshooting guides.
If after reading “Troubleshooting” you determine your unit needs factory service,
please attach a description of the problem and send it with the unit with any acces-
sories to the address below. If you are including a check, please attach it to the unit.
Humminbird
Service Department
108 Maple Lane
Eufaula, AL 36027
Place on bottom of hull
Align with transom.
DO NOT LET DEADRISE
INTERSECT THIS LINE
PLACE EITHER CORNER
ON DEADRISE ANGLE
TO
P
Use 5/32" drill bi
t
Drill Drill
PLACE EITHER CORNER
ON DEADRISE ANGLE
TOP
Use 5/32" drill bi
t
DrillDrill
Level
15", 380mm
from prop(s).
PLACE EITHER ARROW
ON DEADRISE ANGLE
TOP
Remove and use for
Transducer Installation
Use 4mm (⁵⁄₃₂")
drill bit & drill
two holes for hull type
Drill ●
Drill ■
For use with bracket PN 404329-1
Cut and use for Fiberglass Hulls
Fiberglass
Fiberglass
Aluminum
Aluminum
Transducer
Guide
Transducer bottom
Hull
Cut and use for Aluminum Hulls
30mm
15mm