Lowrance electronic X105C DF, X100C manual Good location, Transom Bottom of hull

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Recommended tools for this job include: drill, 7/8" drill bit, 1/8" drill bit

for pilot holes, screwdriver. Required supplies for this job include: four #8 stainless steel wood screws (3/4" long), high quality, marine grade above- or below-waterline sealant.

First find a location on the boat's transom where the water flow is smoothest. Don't mount the sensor behind strakes or ribs. These will disturb the water flow to the speed sensor. Make sure the sensor will remain in the water when the boat is on plane. Also make sure the lo- cation doesn't interfere with the boat's trailer. Typically, the sensor is mounted about one foot to the side of the transom's centerline.

Once you've determined the proper location for the unit, place the sen- sor on the transom. The bottom of the bracket should be flush with the hull's bottom. Using the sensor as a template, mark the hull for the screws' pilot holes. Drill four 1/8" holes, one in each end of the slots.

Mount the sensor to the hull using #8 stainless steel wood screws (not included). Use a high quality, marine grade above- or below-waterline sealant to seal the screws. Make sure the sensor is flush with the bot- tom of the hull and tighten the screws.

Good location

Stern view showing good location for mounting sensor on transom.

Transom

Bottom of hull	Bottom of hull

Speed sensor mounting configuration: side view (left) and rear view (right.)

If the base of the transom has a radius, fill the gap between the tran- som and the sensor with the sealant. This will help ensure a smooth water flow.

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Contents X100C X105C DF Lowrance Electronics Inc 12000 E. Skelly Dr Tulsa, OK USA Table of Contents Page Read Me First Page How Sonar Works Menu Commands How to use this manual typographical conventionsArrow Keys KeyboardPreparations Transducer InstallationDual-frequency transom installations Single-frequency transom installationsSingle-frequency trolling motor installations Shoot-through hull installationsDeadrise less than Strakes Pad How low should you go?Good location Poor location Location Poor angle Transom Transducer centerline Hull bottom Shoot-thru-hull vs. Transom MountingDot Assembling the bracketTransducerTransducer bracket Ratchet Aligning the transducer on the transomRatchets Drilling mounting holes Assembling the transducerTransom Attaching transducer to transomBottom Hull Flat-bottom hull Deep-vee hull TMB-S bracket Internal tooth washer Bolt Nut Flat washer Trolling Motor Bracket Installation single-frequency onlyPartial fish arches Hulls With Floatation MaterialsTransducer aimed Transducer location High speed Trolling speed Testing Determines Best LocationTrue bottom Second bottom Manual range setting Spread epoxy here Sand this surface Shoot-thru-hull InstallationOptional Speed Sensor Installation Optional Temperature SensorTransom Bottom of hull Good locationPowering a Nmea 2000 Buss Nmea 2000 Power cable Power ConnectionsPowering Your Unit Power Supply cable red and black wires Power connections for the units in this series Nmea 2000 Cable Connections Connecting to a Nmea 2000 NetworkNmea 0183 Cable Connections To Nmea To sonar Network port Units Network SocketMounting the Unit Bracket, In-Dash or Portable Front Bracket Installation173.9 77.1 27.6 137.9 Millimeter 56.9 Inch In-Dash Installation Other AccessoriesPortable Installation Face Cover Keyboard Basic Sonar OperationMain Menu Power/lights on and offMain Menu Pages Page Sonar Page, showing full sonar chart mode Basic Sonar Quick Reference Sonar Operations To adjust sensitivity To Restore Factory Settings Fish Symbols vs. Full Sonar ChartOther Free Training Aids Page To change the ASP level ASP Advanced Signal ProcessingDepth Alarms AlarmsZone Alarm Fish Alarm Calibrate Speed Chart SpeedColorLine Thin or no ColorLine Wider ColorLine Depth CursorCursor line Depth box Depth Range AutomaticDepth Range Manual To switch to Manual Depth RangeDepth Range Upper and Lower Limits To turn Auto Depth Range on againFish arches Area zoomed To change the upper and lower limitsFasTrack Fish I.D. Fish Symbols & DepthsTo turn off upper and lower limits FishTrack To turn the Fish I.D. feature onTo turn on FishTrack Frequency Change Transducer Frequency X105C DF only Symbols with FishTrack depthsTo change the frequency setting to 200 kHz To change the frequency setting to 50 kHzHyperScroll Noise RejectionTo turn off displayed data To change displayed data font size Ping Speed & HyperScrollTo change Ping Speed Reset Water Distance Reset OptionsTo turn off HyperScroll Set Keel Offset Automatic Sensitivity Sensitivity & Auto SensitivityTo adjust sensitivity in manual mode To adjust sensitivity in auto modeTo turn Auto Sensitivity back on Sonar Page & Sonar Chart Display Options Sonar Color ModeTo change the chart mode color scheme Full Sonar ChartDigital Data/Chart Split Zoom Sonar ChartCustomizing the Digital Data/Chart Screen FlashGraf Flasher Sonar SimulatorTo adjust the Surface Clarity level Stop ChartSurface Clarity Zoom & Zoom Bar Upper and Lower LimitsZoom Pan Page Unit freezes, locks up, or operates erratically Unit wont turn onNoise No fish arches when the Fish I.D. feature is offPage Page Supplemental Material Index Page Page Page Lowrance Electronics Full ONE-YEAR Warranty Not toll-free How to Obtain Service…Accessory Ordering Information for all countries Visit our web site