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Owner’s Manual
Fishfinder 340C
full-featured color sonar
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© 2007 Garmin Ltd. or its subsidiaries Garmin International, Inc. Garmin (Europe) Ltd. Garmin Corporation st nd 1200 East 151 Street, Liberty House No. 68, Jangshu 2 Road, Olathe, Kansas 66062, USA Hounsdown Business Park, Shijr, Taipei County, Taiwan Tel. (913) 397.8200 or (800) 800.1020 Southampton, Hampshire, SO40 9RB UK Tel. 886/2.2642.9199 Fax (913) 397.8282 Tel. +44 (0) 870.8501241 (outside the UK) Fax 886/2.2642.9099 0808 2380000 (within the UK) Fax +44 (0) 870.8501251 All rig
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IIntroduct on > About t hIs MAnuAl About This Manual IntroductIon To get the most out of your Fishfinder 340C, read this manual and ® Thank you for choosing the Garmin Fishfinder 340C. The learn the operating procedures. This manual includes the following: Fishfinder 340C is a full-featured, color sonar that offers a choice • Introduction —contains the Table of Contents, product of display styles, a dual beam or dual frequency option, and many registration, contact, and cleaning informatio
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IntroductIon > t Able of c ontents Using the Fishfinder 340C ................................................21 t able of c ontents Learning the Basic Functions .............................................. 21 Using the Fishfinder 340C Keypad ...................................... 22 Introduction ...........................................................................i Understanding the Main Pages ............................................ 23 About This Manual .............................
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IntroductIon > Product r egIstrA It on , c ont Act g AMI r n , And c AIr ng for the f IshfInder Cleaning the Case Product Registration Clean the Fishfinder’s outer casing (except for the screen) using Help us better support you by completing our online registration a cloth dampened with a mild detergent solution. Wipe it dry. today! Have the serial number of your Fishfinder handy, and Avoid chemical cleaners and solvents that can damage plastic connect to our Web site (http://www.garmin.co
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IntroductIon > WAIrn ng Warning Failure to avoid the following potentially hazardous situations could result in an accident or collision resulting in death or serious injury: When navigating, carefully compare information displayed on the Fishfinder 340C to all available navigation sources, including information from visual sightings, and maps. For safety, always resolve any discrepancies or questions before continuing navigation. WARNING: This product, its packaging, and its components contain
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g ettIng s t Atedr > PAckIng l Ist And o PIt onAl AIccessor es Optional Package (010-00505-02) GIett nG s artedt • Standard package Before installing and using your Fishfinder 340C, check to see that • Dual frequency (200/50kHz) plastic transom mount your package includes the following items. The package number transducer with depth and temperature and an attached is on the outside of the box. If any parts are missing, contact your 30-foot cable Garmin dealer immediately. Optional Package
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g ettIng s t Atedr > u nderst AInd ng the f IIshf nder And s onAr The transducer sends sound waves down into the water in a cone Understanding the Fishfinder and Sonar shape, similar to a flashlight beam (covering a smaller circular area The Fishfinder 340C is a fully automatic, color sonar unit that at the top and angling out to a larger circular area at the bottom). allows you to go out on the water and find fish without having These sound waves reflect off of any object that they hit, an
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g ettIng s t Atedr > u nderst AInd ng the f IshfInder And s A on r The wide beam is more helpful in shallow water, because it gives Using Dual Beam you a much wider view of objects in the water, including areas Dual beam works best for shallow water (for example, inland) beyond the sides of your boat. At a depth of 30 feet, the wide beam applications. A dual beam transducer can transmit a narrow or a covers the area of approximately a 20-foot circle. wide beam. The water area covered by the
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g ettIng s t Atedr > u nderst AInd ng the f IshfInder And s onAr NOTE: If the Fishfinder is unable to track the bottom for any Surface Water clutter reason, the digits which indicate depth flash on and off to alert depth you that the Fishfinder is not tracking the bottom. Depth Along the top of the screen, you might see a grouping of intense scale colors. This area is surface clutter, which can be caused by waves Suspended or any other sonar interference at the surface of the water. Too
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Inst AIll ng the f IshfInder 340 > c s Ielect ng A l ocA tIon for the f IIshf nder DO NOT mount the unit in an area that is exposed to extreme IIallnst nG the f IshfInder 340c temperature conditions. To ensure the successful operation of your Fishfinder 340C, you NOTE: The temperature range for the Fishfinder 340C is 5°F must properly install the Fishfinder and all of its related parts. to 131°F (-15°C to 55°C). Extended exposure to temperatures exceeding this range (in storage or operating
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Inst AllIng the f IshfInder 340 > c MIount ng the f IIshf nder Mounting the Fishfinder There are two possible installation methods for your Fishfinder: OK • You can mount the Fishfinder onto a bracket that attaches to To mount the bracket assembly: the console or overhead. 1. Using the swivelbase as atemplate, mark the location of • You can flush mount the Fishfinder into a flat panel. the three holesthat secure the bracket to the mounting surface. Surface Mounting the Fishfin
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Inst AIll ng the f IshfInder 340c > MIount ng the f IIshf nder Installing the Unit on the Mounting Bracket Flush Mounting the Fishfinder You can flush mount the Fishfinder 340C into a flat panel. To install the Fishfinder on the mounting bracket: 1. Align the slot on the back of the Fishfinder with the long • Select an appropriately sized location for the unit. mounting knob, and slide the Fishfinder into place. If • Use the Flush Mount Template provided in the box to necessary , adjust the
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Inst AIll ng the f IshfInder 340 > c MIount ng the f IshfInder 8. Place washers over the mounting studs, and then thread To flush mount the Fishfinder 340C: on one hex nut per mounting stud. T ighten all four until the 1. T rim the Flush Mount T emplate, and tape it to the chosen Fishfinder is snug against the mounting surface. Install and location. tighten the second hex nut on all four mounting studs to lock 2. Using a center punch, indent the center of each mounting the first one i
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Inst AIll ng the f IIshf nder 340 > c MountIng the t rAnsducer Assembling the Transducer Mounting the Transducer Proper transducer installation is key to getting the best performance To assemble the transducer: from your new Fishfinder. If the transducer lead is too short, 1. Insert the rubber washer and plastic spacer into the transducer at the same time. DO NOT lubricate the rubber extension cables are available from your Garmin dealer. Coil and washer. secure any excess cable. 2. Ro
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Inst AIll ng the f IshfInder 340c > MountIng the t rAnsducer 3. Place the transducer assembly against the motor body of Mounting the Transducer on a Trolling Motor the trolling motor , with the front of the transducer pointed (Dual Beam Only) away from the trolling motor propeller. To mount the transducer on a trolling motor: 4. W rap the two ends of the cable tie around the motor body . 1. Slide the large cable tie through the slot on the transducer Place the pointed end of the cabl
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Inst AllIng the f IshfInder 340c > MountIng the t A r nsducer 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. DO NOT mount the transducer behind strakes, rivet lines, struts, fittings, water intake, discharge ports, eroding paint, or anything that creates turbulence. • Mount the transducer as close to the cen
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Inst AllIng the f IIshf nder 340c > MountIng the t rAnsducer Tool list (not included)—drill, 3/8" wrench or socket, 5/32" and Mark the location. Using a 1/8" bit, drill a pilot hole approximately 3/8" (10 mm) deep. 1/8" drill bits, masking tape, #2 Phillips screwdriver, and marine sealant. 6. Attachthe cable clampusing a 4 x 12 mm screw.Coat the screw with marinesealant before installation. Repeat steps To mount the transducer on a transom: 5 and 6 using the other cable cla
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Inst AllIng the f IshfInder 340c > MIount ng the t rAnsducer NOTE: Many modern hulls have a dedicated pocket for Shoot-Thru-Hull Installation shoot-thru-hull transducer installation. If you are unsure if your To avoid drilling a hole to mount a thru-hull transducer, a hull is equipped with a pre-located pocket, contact your hull transducer can be secured with epoxy inside a boat (shoot-thru- manufacturer. hull installation). This type of installation can provide better noise reduction and
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Inst AllIng the f IIshf nder 340c > MountIng the t rAnsducer To permanently install the transducer: 1. Lightly sand the surface of the hull and face of the transducer with 400 grit wet or dry sandpaper . 2. Build a dam using strip caulk about 1/4" (6 mm) tall. Pour about1/8" (3 mm) oftwo-part, slow-cure epoxyinto the dam. 3. Place the transducer in the epoxy , turning the transducer to workout anyair bubbles. 4. W eight the transducer in place, and allow it to cur
