Step 5: Test the Installation
NOTE: Although it is possible to perform some checks with the boat on a trailer, the boat should be in the water to properly test the installation.
Press and hold the POWER key until the Fishnder 300C beeps. Use ROCKER and SELECT to highlight and select menu items on the
Fishnder 300C.
The rst time you turn your Fishnder 300C on, you must congure a series of initial settings.
To initialize your Fishnder 300C settings:
1. Language—selecttheon-screenlanguage.
2. Units—selectStatute (mh, ft, °F),Metric (kh, m, °C),orNautical (kt, ft, °F).
3. Color Scheme—selectWhiteorBlueasthebackgroundonsonarscreens.
4. Select OKtoreturntotheHomescreen.
The Home screen appears after you select your conguration options.
NOTE: If the transducer is not detected, a “Transducer Disconnected, Sonar Turned Off” message appears.
The transducer must be in the water to work properly. You cannot get a depth or distance reading when the transducer is out of the water.
When you place your boat in the water, check for leaks around any screw holes that were added below the water line. Do not leave your boat in
the water for an extended period of time without checking for leaks.
To test the transom-mount transducer installation:
1.Begintestingtheinstallationataslowspeed.Ifthesonarappearstobeworkingproperly,graduallyincreaseboatspeedwhileobserving
sonaroperation.Ifthesonarsignalissuddenlylost,orthebottomreturnisseverelydegraded,notethespeedatwhichthisoccurs.
2. Returntheboattothespeedatwhichthesignalwaslost.Makemoderateturnsinbothdirectionstoseeifthesignalimproves.
3. Ifthesignalstrengthimproveswhileturning,adjustthetransducersothatitextendsanother1/8"(3mm)belowthetransomoftheboat.��It
mighttakeseveraladjustmentstoeliminatethedegradation.
4.Ifthesignaldoesnotimprove,youmighthavetomovethetransducertoadifferentlocation.
NOTE: When adjusting the depth of the transducer, make the adjustments in small increments. Placing the transducer too deep can adversely affect
boat performance and put the transducer at greater risk of striking underwater objects.
For the latest free software updates (excluding map data) throughout the life of your
Garmin products, visit the Garmin Web site at www.garmin.com.
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PartNumber190-00864-03Rev.B