[. . . ] This type of failure and related consequences are not covered by the manufacturer's limited warranty.
Step 2: Mount the Fishfinder 300C
You can mount your Fishfinder 300C in one of two ways: · Bail Mount--mount the Fishfinder 300C onto the bracket that attaches to the console or overhead. · Flush Mount--use the flush mount kit to mount the Fishfinder 300C into a flat panel.
Bail Mounting the Fishfinder 300C
The Fishfinder 300C is suitable for mounting in exposed locations or at the navigation station. The included tilt mounting bracket can be used for console or overhead mounting. Bail mounting requires the following tools and hardware: · · · · Three of the included number 8 (4. 2 × 1. 4 DIN7981) ANSI mounting screws Phillips-head screwdriver (not included) Drill and drill bit (not included) Center punch and hammer (not included)
190-00864-03 Rev. [. . . ] 11. Replacethemountingcoversbysnappingthemintoplace.
Step 3: Install the Transducer
The following instructions describe the basic installation of typical transducers, such as the one included with your Fishfinder 300C. Additional installation instructions are provided in the transducer kits. Some transducers may have to be installed by a professional marine installer.
CAUTION: DO NOT cut the transducer lead or any part of the transducer cable. The cable cannot be spliced and connected to any existing (Garmin or non-Garmin) transducer cables.
If the transducer lead is too short, extension cables are available from your Garmin dealer. Coil and secure any excess cable.
Assembling the Transducer
To assemble the transducer: 1. Inserttherubberwasherandtheplasticspacerintothetransduceratthesametime. DONOTlubricatetherubberwasher. Routethecabletowardthebackofthetransducer. Slidethetransducerintothetransducermount. 3. Placethe5mmflatwasheronthe10-32×1. 75"screw, andinsertthescrewthroughthetransducermount, thespacer, andtherubber washer. 4. Placetheremaining5mmflatwasherontheexposedend. Installthe10-32locknutfingertight. Retightenthetransducerafterinstallationon theboat.
Cable-tie slot
Back of the transducer
Fishfinder 300C Installation Instructions
3
Mounting the Transducer on a Trolling Motor
To mount the transducer on a trolling motor: 1. Slidethelargecabletiethroughtheslotonthetransducermount, withtheridgesofthecabletiefacingup, untilequallengthsofcabletie extendonbothsidesofthemount. NOTE: For cold water, or heavy timber or debris areas, a metal 45" (100130 mm) worm-gear clamp is recommended. 3. Placethetransducerassemblyagainstthemotorbodyofthetrollingmotor, withthefrontofthetransducerpointedawayfromthe trolling-motorpropeller. 4. Wrapthetwoendsofthecabletiearoundthemotorbody. Placethepointedendofthecabletiethroughthefastenerholeontheopposite endandpullitthroughuntilitissnugbutnottight. (Thecabletieclickswhenyoupullit. ) 5. Positionthetransducersothatitisparallelwiththebottomwheninuse, andmakesurethegasketisalignedproperly. Pullthecable-tie enduntiltight. Trimofftheexcessifnecessary. Tightenthe10-32lockingnutuntilittouchesthemountingbracket, andthentighten1/4turn more. (Donotovertighten. ) 6. Routethe30-foot(9m)transducercableusingthesuppliedcabletiestosecurethecabletothemotorshaft. Youcanfilltheforward-facing portion(exceptthecable-tiepocket)ofthetransducermountwithsealanttoavoidaccumulatingdebris.
Cable tie
Front of the transducer
Mounting the Transducer on a Transom
· · · · ·
When selecting a transom-mount location, consider the following for optimal performance: For your sonar to operate properly, the transducer must be located in calm water. (This voids your warranty. ) DO NOT mount the transducer in locations where it might be jarred when launching, hauling, or storing. DO NOT mount the transducer in the path of the propeller on single-drive boats. The transducer can cause cavitation that can degrade the performance of the boat and damage the propeller. On twin-drive boats, mount the transducer between the drives, if possible.
NOTE: DO NOT mount the transducer behind strakes, struts, fittings, water intake or discharge ports, or anything that creates air bubbles or causes the water to become turbulent. The transducer must be in clean (non-turbulent) water for optimal performance.
4
Fishfinder 300C Installation Instructions
Apply marine sealant to all screw threads to prevent water from seeping into the transom.
Mount the transducer cable cover well above the waterline.
Transducer should extend 1/8" (3. 2 mm) below a fiberglass hull or 3/8" (9. 5 mm) below an aluminum hull. Ensure that the transducer is below water level when the boat is on plane at high speed. The transducer can cause cavitation that may degrade the boat performance and damage the propeller.
Required Tools (not included)--drill, 3/8" wrench or socket, 5/32" (4 mm) and 1/8" (3. 2 mm) drill bits, masking tape, number 2 Phillips screwdriver, and marine sealant.
To mount the transducer on a transom: 1. Positionthetransducermountattheselectedtransomlocation. Makesurethetransducerisparallelwiththewaterline. Markthecenter locationsofeachholeonthetransducermount. 2. Usinga5/32"(4mm)bit, drillthepilotholesapproximately1"(25mm)deepatthemarkedlocations. Toavoiddrillingtheholestoodeep, wrapapieceoftapearoundthebitat1"(25mm)fromthepointofthebit. 3. Applymarinesealanttothe5×30mmscrews. Attachthetransducerassemblytothetransomusingthe5×30mmscrews. Adjust thetransducerassemblytoextendbeyondthebottomofthetransomapproximately1/8"(3mm)onfiberglasshullsor3/8"(10mm)on aluminumhulls. Adjustthetransducerassemblytobealignedparallelwiththewater. 4. Tightenthe10-32lockingnutuntilittouchesthemountingbracket, andthentighten1/4turnmore. (Donotovertighten. ) 5. Placethefirstcableclamponthetransducercable, approximatelyonethirdofthedistancebetweenthetransducerandthetopofthe transom. [. . . ] 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. Begintestingtheinstallationataslowspeed. Ifthesonarappearstobeworkingproperly, graduallyincreaseboatspeedwhileobserving sonaroperation. Ifthesonarsignalissuddenlylost, orthebottomreturnisseverelydegraded, notethespeedatwhichthisoccurs. Returntheboattothespeedatwhichthesignalwaslost. Makemoderateturnsinbothdirectionstoseeifthesignalimproves. Ifthesignalstrengthimproveswhileturning, adjustthetransducersothatitextendsanother1/8"(3mm)belowthetransomoftheboat. It mighttakeseveraladjustmentstoeliminatethedegradation. [. . . ]