5. The unit comes on before I press the POWER-MENU key, and won’t turn off.
Check the transducer cable — if the outer jacket of the cable has been cut and the cable is in contact with bare metal, you will need
to repair the cut with electrical tape. If there is no problem with the cable, disconnect the transducer from the unit and see if the prob-
lem is corrected, to confirm the source of the problem.
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 PiranhaMax has over-voltage protection that turns the unit off when input voltage exceeds 20 VDC. Some outboard motors do not effec-
tively regulate the power output of the engine’s alternator and can produce voltage in excess of 20 Volts when running at high RPMs.
8. The display begins to fade out. Images are not as sharp as normal.
Check the input voltage. The PiranhaMax will not operate on input voltages below 10 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 electronic devices. Turn off any near-
by electronics and see if the problem goes away. Noise can also be caused by the engine. If engine noise is causing the interference,
the problem will intensify at higher RPMs. Increase the engine speed with the boat stationary to isolate this cause. Propeller cavita-
tion can also appear as noise on the display. If the transducer is mounted too close to the propeller, the turbulence generated can
interfere with the sonar signal. Make sure that the transducer is mounted at least 15" (380 mm) from the propeller.
International Purchases
A separate warranty is provided by international distributors for units purchased outside the United States. This warranty is includ-
ed by your local distributor and this distributor maintains local service for your unit. Warranties are only valid in the area of intend-
ed distribution. Units purchased in the United States or Canada must be returned to our factory in the United States for service.
