GSD™ 24/26 Installation InstructionsTo obtain the best performance and to avoid damage to your boat, install theGarmin ® GSD 24/26 unit according to the following instructions. Professionalinstallation of the unit is highly recommended, because specific knowledge ofboat construction is required to properly install the unit.Read all installation instructions before proceeding with the installation. Ifyou experience difficulty during the installation, contact Garmin Product Support.Registering Your DeviceHelp us better support you by completing our online registration today.• Go to http://my.garmin.com.• Keep the original sales receipt, or a photocopy, in a safe place.Contacting Garmin Product SupportContact Garmin Product Support if you have any questions about this product.• In the USA, go to www.garmin.com/support, or contact Garmin USA byphone at (913) 397.8200 or (800) 800.1020.• In the UK, contact Garmin (Europe) Ltd. by phone at 0808 2380000.• In Europe, go to www.garmin.com/support and click Contact Support forin-country support.Important Safety Information WaRnInGYou are responsible for the safe and prudent operation of your vessel. Sonar isa tool that will enhance your awareness of the water beneath your boat. It doesnot relieve you from the responsibility of observing the water around your boatas you navigate.When drilling or cutting, always check the opposite side of the surface. Be awareof fuel tanks, electrical cables, and hydraulic hoses. CautIonFailure to install and maintain this equipment in accordance with theseinstructions could result in damage or injury.Always wear safety goggles, ear protection, and a dust mask when drilling,cutting, or sanding.NoticeThis equipment must be installed by a qualified marine installer.transducersA transducer is required to send and receive the sonar signal from theGSD 24/26. Proper transducer selection and installation are critical to theoperation of the GSD 24/26. Because mounting locations vary, see your localGarmin dealer or contact Garmin Product Support for more information. Go towww.garmin.com to view a full list of transducers.GSD 24/26 InstallationNoticeThe GSD 24/26 must be installed according to the following instructions to getthe best possible performance. If you experience difficulty with the installation,contact Garmin Product Support.Because every boat is different, you must carefully plan the GSD 24/26 sounderinstallation.1 Select a mounting location (page 1).2 Mount the sounder (page 1).3 Connect the sounder to the Garmin Marine Network and to power(page 2).4 Connect the sounder to the transducer (page 2).tools needednote: If you are not using the mounting hardware included in the kit, use themost appropriate tool for securing that hardware.• Drill• #8 (5 mm) drill bit appropriate for mounting surface• 1 1 / 4 in. (32 mm) paddle drill bit or hole saw appropriate for mounting surface• #2 Phillips screwdriver• 3 mm flat screwdriver• Cable ties (optional)• Wire cutter• Wire stripper• 1 in. (24 mm) and 19 / 32 in. (15 mm) wrenches• Marine sealant (optional)Mounting the SounderMounting Location Considerations• The sounder dimensions and mounting hole locations can be reviewed onthe templates included in the sounder package.• The sounder must be mounted in a location where it cannot be submerged.• The sounder must be mounted in a location with adequate ventilation whereit will not be exposed to extreme temperatures.• The sounder should be mounted in such a way that the LED is visible.• The sounder should be mounted so that the power and network cables canbe easily connected.• The sounder should be mounted so that the transducer cable can beconnected. If required, transducer extension cables up to 20 ft. (6 m) areavailable through your Garmin dealer.Mounting the Sounder1 After you select a mounting location (page 1), determine the mountinghardware needed for the surface.Mounting hardware is included with the sounder, but it may not be suitablefor the mounting surface.2 If necessary, purchase the mounting hardware.3 Complete an action:• Hold the sounder in the intended mounting location and mark thelocations of the mounting holes in the mounting surface, using thesounder as a template.• Use the template included with your sounder to mark the locations of themounting holes.4 Drill the mounting holes through the mounting surface.5 Secure the sounder to the mounting surface using the selected mountinghardware.October 2011 190-00789-02_0C Printed in Taiwan