FOREWORD

A Word to LS-6100 Owners
Congratulations on your choice of the FURUNO LS-Echo Sounder. We are confident you will see why the FURUNO name has become synonymous with quality and reliability. For over 50 years FURUNO Electric Company has enjoyed an enviable reputation for innovative and dependable marine electronics equipment. This dedication to excellence is furthered by our extensive global network of agents and dealers. This equipment is designed and constructed to meet the rigorous demands of the marine environment. However, no machine can perform its intended function unless operated and maintained properly. Please carefully read and follow the recommended procedures for operation and maintenance. We would appreciate hearing from you, the end-user, about whether we are achieving our purposes. Thank you for considering and purchasing FURUNO equipment.

Features

The FURUNO LS-6100 is a dual frequency (50 kHz, 200 kHz) monochrome LCD echo sounder. Comprised of a display unit and a transducer, the LS-6100 displays underwater conditions on a bright 6-inch monochrome LCD. The main features of the LS-6100 are
Compact design permits installation where space is limited. Bright 6-inch monochrome LCD gives excellent readability even in broad daylight. Wide variety of display modes: single frequency, dual frequency, bottom-lock, marker-zoom, bottom-zoom, and nav data. Automatic function permits unattended adjustment of range and gain. The range scale and gain automatically change to display the bottom in the darkest gray tone on the lower half of the screen. User-programmable nav data displays provide analog and digital nav data. Alarms: Bottom, Fish (bottom-lock and normal), Speed, Water Temperature and Arrival. (Speed and arrival alarms require appropriate sensor; water temperature alarm requires water temperature data.) A-scope display helps discern echo amplitude. White line feature helps discriminate fish lying near the bottom. Destination waypoint feature provides range, bearing, and time-to-go to destination waypoint. Waterproof construction permits installation on open bridge.

SYSTEM OVERVIEW

System configuration

FURUNO

MENU ESC

DISPLAY UNIT LS-6100

GAIN RANGE ALARM

ECHO SOUNDER

POWER BRILL

GPS Navigator/ Plotter

Power Supply 12 VDC : Standard : Option : Local Supply

TRANSDUCER

Water Temperature/Speed Sensor ST-02MSB, ST-02PSB (Select one) 520-5PSD, 520-5MSD, 520-5PWD, 525ST-MSD, 525ST-PWD (Select one)

Equipment lists

Standard supply
Name Display Unit Transducer Triducer (transducer plus spd/temp sensor) Installation Materials (CP02-07000) Spare Parts (SP02-04500) Template Code No. Qty Remarks LS-520-5PSD 000-015-204 Thru-hull mount 520-5MSD 000-015-212 Thru-hull mount Select 520-5PWD 000-015-126 Transom mount one 525ST-MSD 000-015-263 Thru-hull mount Transom mount 525ST-PWD 000-015-261 Tapping screw (4 pcs., 5 x 20 SUS304, 000-802-081) Washer head screw B (4 pcs., M4 x 20 SUS304, 000-804-742) Cable assy. (1 pc., MJ-A15A3F0003-030, 000-145-513)

Nav data displays

The nav data displays appear on the left 2/3 of the screen. Data other than depth requires appropriate sensor. You can display between two and four items in a nav data display and choose the item and order and to display them. See paragraph 1.23 to choose the items to display and NAV DATA-1 and NAV DATA-2 in paragraph 2.1 to choose the number of items to display.
Single frequency display Zoom marker

Switched with depth

Temperature

Odometer

Bottom-lock display
The bottom-lock display provides a normal picture on the right half of the screen and a 15 feet (5 meter)* wide layer in contact with the bottom is expanded onto the left half of the screen. This mode is useful for detecting bottom fish. * = Operator selectable

Trip meter

10.0nm

NAV DATA-1 display

0.25nm
Zoom marker This section is zoomed Single frequency display

1/1 00

Zoomed fish

Fish 30 school

10 kt 0

NAV DATA-2 display

Bottom displayed flat

Sample NAV DATA displays

1.5 Menu Operating Procedure
The LS-6100 has three menus: Main menu (referred to in text as menu), System and Installation. Below is the basic menu operating procedure. 1. Press the [MENU/ESC] key to open the menu. Page 1 or Page 2 of the menu appears depending on the page last used.

P = Function of PROG key

P AUTO MODE SHIFT PIC. ADVANCE NOISE LIMIT CLUTTER SIGNAL LEVEL A-SCOPE HUE WHITE LINE DEEP GAIN [MENU]: Exit Note: SHIFT and CLUTTER are not available in the auto mode. Off : 0ft : 1/1 : Off : Off : Off : Off : Day : Off : Low

Off Cruising Fishing

Auto mode options window 4. Use or to choose option or set numeric value. 5. Press the [MENU/ESC] key to close the menu, or press to continue menu operation.

1.6 Automatic Operation

How automatic operation works
The automatic function automatically chooses the proper gain, range scale and clutter. It works as follows:
The range changes automatically to display the bottom echo on the screen.
The gain is automatically adjusted to display the bottom echo in the darkest tone. Clutter (on the menu), which suppresses low-level noise, is automatically adjusted.

Page no.

Menu, page 1 2. Use or to select an item. To view page 2 of the menu, press to show the display below.
GOTO WPT Off WAYPOINT LIST. TRIP RESET? GAIN ADJ 200 GAIN ADJ 50 DRAFT : +0 : +0 : 0.0ft
Choosing automatic operation
The automatic mode provides two choices of modes: cruising and fishing. 1. Press the [MENU/ESC] key to open the menu. 2. Choose AUTO MODE from page 1 of the menu. 3. Press to open the mode options window. 4. Choose Cruising or Fishing as appropriate. Cruising is for tracking the bottom; Fishing is for searching fish schools. Since Cruising uses a higher clutter rejection setting than fishing, it is not recommended for fish detection - weak fish echoes may not be displayed. Fishing clearly displays weaker echoes.

1. Press the [+] or [-] key of the [RANGE] key and the display should now look something like the one below. 2. Press the [+] or [-] key of the [RANGE] key again to choose a basic range.
1000ft 600ft 400ft 200ft 120ft 60ft 30ft 15ft
Gain too high Gain proper Gain too low
Examples of proper and improper gain 1. Press the [GAIN] key and the display shown below appears.

GAIN Min

200k 50k
Basic ranges (default) Shifting the range The basic range may be shifted up or down in the manual mode as follows: 1. Press the [MENU/ESC] key to open the menu. 2. Choose SHIFT from page 1 of the menu. 3. Press to open the shift options window.
Gain adjustment window 2. When using the dual frequency display, press or to choose frequency. 3. Press the [GAIN] key to set. (You may also use or.) Adjust so that a slight amount of noise remains on the screen. 4. Press the [MENU/ESC] key to close the gain adjustment window.
Shift window 4. Use or to choose amount of shift desired. 5. Press the [MENU/ESC] key to close the menu. Note: The picture may not be displayed if the amount of shift is greater than actual depth.
1.8 Choosing Picture Advance Speed
The picture advance speed determines how quickly the vertical scan lines run across the screen. When choosing a picture advance speed, keep in mind that a fast advance speed will expand the size of the fish school horizontally on the screen and a slow advance speed will contract it. Note that the picture is not refreshed when picture advancement is stopped. Therefore, use caution when steering the vessel under this condition.

VRM VRM depth 20

Picture and picture advancement speed 1. Press the [MENU/ESC] key to open the menu. 2. Choose PIC. ADVANCE from page 1 of the menu. 3. Press to show the options window.
Stop 1/16 Slow 1/8 1/4 1/2 1/1 2/1 4/1 Fast
Picture advance options window 4. Use or to choose picture advance speed desired. The fractions in the options window denote the number of scan lines produced per transmission. For example, 1/8 means one scan line is produced every 8 transmissions. Stop freezes the display and it is convenient for observing an echo. 5. Press the [MENU/ESC] key to close the menu.
How to measure depth with the VRM

1.10 A-scope Display

This display shows echoes at each transmission with amplitudes and tone proportional to their intensities, on the right 1/4 of the screen. It is useful for estimating the kind of fish school and bottom composition. Note: In the dual frequency display, the A-scope display is only available with the high frequency display.

Weak reflection (fish or noise) Strong reflection (fish)

1.9 Measuring Depth

The VRM (Variable Range Marker) functions to measure the depth to fish schools, etc. 1. Press or to place the VRM on the object which you wish to measure range. 2. Read the VRM depth just above the VRM.

A-scope display

Strong reflection (bottom)
1. Press the [MENU/ESC] key to open the menu. 2. Press or to choose A-SCOPE from page 1 of the menu. 3. Press to show the options window. 4. Press or to choose the A-scope presentation type desired. Normal: Display shows echoes at each transmission with amplitudes and tone proportional to their intensities Peak: Peak-hold amplitude picture. 5. Press the [MENU/ESC] key to close the menu. 6. To turn off the A-scope display, choose Off at step 4 and then press the [MENU/ESC] key.
Turn the noise limiter off when no interference exists, otherwise weak echoes may be missed.
1.12 Suppressing Low Level Noise
Low intensity speckles may appear over most of screen. This is mainly due to sediment in the water or noise. These can be suppressed by adjusting CLUTTER on the menu. When the automatic mode is on, clutter is automatically rejected. To suppress low level noise in manual sounder operation, do the following: 1. Press the [MENU/ESC] key to open the menu. 2. Use or to choose CLUTTER from page 1 of the menu. 3. Press to show the options window. 4. Use or to choose the degree of suppression desired; 1, 2, 3 ,4, 5 or 6. The higher the number the greater the suppression. 5. Press the [MENU/ESC] key to close the menu. 6. To turn off low-level noise suppression, choose Off at step 4 and then press the [MENU/ESC] key.
1.11 Suppressing Interference
Interference from other acoustic equipment operating nearby or other electronic equipment on your boat may show itself on the display as shown in the figure below. To suppress interference, do the following: 1. Press the [MENU/ESC] key to open the menu. 2. Use or to choose NOISE LIMIT from page 1 of the menu. 3. Press to show the options window. 4. Use or to choose the degree of suppression desired; Off, Low, Medium, or High (highest). 5. Press the [MENU/ESC] key to close the menu.

Clutter appearance

Interference from other sounder

Electrical interference

Forms of interference

1.13 Erasing Weak Echoes

Sediment in the water or reflections from plankton may be painted on the display in low intensity tones.
Fish school 20 clearly shown

White line

Weak echoes

White Line OFF

White Line ON (Mesh)

How white line works

1.15 Waypoints
Appearance of weak echoes These weak echoes may be erased as follows: 1. Press the [MENU/ESC] key to open the menu. 2. Use or to choose SIGNAL LEVEL from page 1 of the menu. 3. Press to show the options window. 4. Use or to choose the degree of suppression desired; Off, Low, or High (highest). 5. Press the [MENU/ESC] key to close the menu. 6. To turn off the signal level function, choose "Off" at step 4 and then press the [MENU/ESC] key. Waypoints may be used to:
Record the latitude and longitude position of an important echo. 12 points may be registered. Output a waypoint position to a plotter to mark position on its screen Find range, bearing and time-to-go to a location (waypoint)
Note: Requires latitude and longitude position from a navigator.
Registering a waypoint on the screen
1. Press the [MARK] key. The cursor appears along with waypoint entry instructions. Note: If there is no position data the message No position data! appears. Check the navigator.

1.14 White Line

The white line feature displays a leading edge of the bottom echo in white. This is useful for discriminating bottom fish near the bottom. 1. Press the [MENU/ESC] key to display the menu. 2. Use or to choose WHITE LINE from page 1 of the menu. 3. Press to show the options window. 4. Use or to choose Off, Tone or Mesh as appropriate. Mesh paints the white line in darker tone than Tone. 5. Press the [MENU/ESC] key to close the menu.

WAYPOINT ENTRY

( Move) Cursor [MARK] Enter [MENU] Cancel

Cursor

50 kHz display
2. Use or to set the cursor where desired. Picture advancement is stopped until step 3 is completed. 3. Press the [MARK] key again. The latitude and longitude position at the cursor is output to the navigator and a vertical line marks location. Further, the display shows the waypoint name (next sequential number) and position of the location selected at step 2.
WAYPOINT Name FREQ. 05 Lat : 3422.796'N Lon : 13607.264'E

Erase? [MENU]: Exit

Registering waypoint from the waypoint list
1. Press the [MENU/ESC] key to open the menu. 2. Use or to choose WAYPOINT LIST from page 2 of the menu. 3. Press.
WAYPOINT LIST 03 ---------------------------------------------[MENU]: Exit

Alarm range marker l Bottom alarm, Fish alarm (normal): Right l Fish alarm (bottom/lock): Left * Alarm icon : Bottom alarm : Fish alarm (normal) : Fish alarm (B/L) : Temperature alarm (C or F shown) : Speed alarm : Arrival alarm
How the alarm works Note: To disable an alarm, choose Off at step 5 in the above procedure.

Silencing the buzzer

The buzzer sounds and the appropriate alarm icon appears and flashes when an alarm is violated. You can silence the buzzer by pressing the [ALARM] key. However, the buzzer will sound whenever the alarm setting is violated. Note: The audio and visual alarms are released against the last-violated alarm when multiple alarms are active.

1.22 Gain Compensation

If the gain is too high or too low, or the gain for the low and high frequencies appears unbalanced, you can compensate it as follows: 1. Press the [MENU/ESC] key to open the menu. 2. Use or to choose GAIN ADJ 200 or GAIN ADJ 50 from page 2 of the menu. 3. Press to show to the options window. 4. Use or to set the amount. The setting range is 50 to +50. 5. Press the [MENU/ESC] key to close the menu.
1.20 Resetting Trip Distance
1. Press the [MENU/ESC] key to open the menu. 2. Use or to choose TRIP RESET? from page 2 of the menu. 3. Press. 4. Press to reset trip distance. Beeps are generated while the trip distance is being reset. 5. Press the [MENU/ESC] key to close the menu.
1.23 Setting Up Nav Data Displays
The user may arrange the nav data displays as desired. 1. Use the [MODE] key to select the nav data display you want to set up. 2. Press the Cursor Pad to display the NAV DATA SETUP window.
NAV DATA SETUP / : Window Selection / : Data Selection [MENU]: Exit
(6) (7) (8) (4) (2) (9) (5) Three-data Four-data Two-data display display display Items displayable in (1) - (3): depth, position, course, range and bearing, trip distance, odometer, water temperature, heading, air pressure, time-to-go to destination waypoint, XTE*, speed*, wind speed and direction*, destination waypoint data*, compass* Items displayable in (4) - (9): depth, position, course, range and bearing, trip distance, odometer, water temperature, heading, air pressure, time-to-go to destination waypoint, XTE*, wind speed and direction (1) (3)

* = Graphic display

NAV DATA SETUP window 3. Use or to choose a data display window desired. A dashed-line rectangle circumscribes your selection. 4. Use or to choose item to display. See the next page for a description of the displays.

Nav data window and item displayable 5. Press the [MENU/ESC] key to finish. Note: You can choose the number of items to show in a nav data display with NAV DATA-1 and NAV DATA-2 on the System menu.

GRAPHIC DISPLAYS

DIGITAL DISPLAYS

1 0.5 0

XTE scale

32.8ft

Position

WATER TEMPERATURE

Heading TRUE/MAG#

XTE GRAPHIC

30 00.065'N 130 00.574'E

POSITION

HEADING

Wind Speed APP*

Speedometer

19.3kt

Course

8.0m/s

WIND SPEED

Wind Dir. APP*

SPEED GRAPHIC

Wind 150 Speed m/s 0

COURSE

Rng Brg

WIND DIRECTION

Air Pressure

90 120

1.21nm 140

RANGE & BEARING&

1018hpa

AIR PRESSURE

Time to Go

WIND GRAPHIC
Wpt 03 Rng 0.19nm XTE 0.00nm
Destination waypoint data: Name, Range, XTE

Brg 321 Cse 333

Bearing, Course Destination waypoint direction

TRIP DISTANCE

00H30M

TIME-TO-GO&

ODOMETER
DESTINATION WAYPOINT GRAPHIC

Brg 30 N E Cse 90

* APP or TRUE depending on menu setting. # TRUE or MAG depending on menu setting. &To destination waypoint
Bearing to destination waypoint
Note 1: Nav data is updated with some delay. Note 2: When data is lost 120 sec., the display shows "- -" at the location where Course data is lost.

COMPASS GRAPHIC

2. SYSTEM & INSTALLATION MENUS
The System menu mainly consists of items which once set do not require frequent adjustment. You may display this menu by choosing SYSTEM MENU at page 2 of the menu and pressing.

PAGE 1

2.1 System Menu
Page 1 LANGUAGE: The system language is available in English, several European languages and Japanese. To change language, select language desired and press the [MENU/ESC] key. DEPTH UNIT: Choose unit of depth measurement from meters, feet, fathoms, passi/braza and hiro (Japanese). SPEED UNIT: Choose unit of speed measurement from knots, miles per hour and kilometers per hour. Requires speed data. WIND UNIT: Choose unit of wind speed measurement from m/s, kt, km/h, and mph. Requires wind speed data. TEMP UNIT: Choose unit of temperature measurement; Celsius or Fahrenheit. Requires temperature data.

Nav window (water temperature and speed) NMEA0183: Choose NMEA version of navigator; Ver. 1.5, Ver. 2.0 or Ver. 3.0. TLL OUTPUT: Enables/disables output of TLL (Target Latitude, Longitude) position when the [MARK] key is operated. TLL outputs latitude and longitude position. FURUNO-TLL, available with connection of navigator that can output FURUNO TLL, outputs latitude and longitude, water temperature, depth, etc. BEARING: Ships course and bearing to a waypoint may be displayed in true or magnetic bearing. Magnetic bearing is true bearing plus (or minus) earths magnetic deviation. Requires bearing data.
Page 3 BASIC RANGE 1 - BASIC RANGE 8: Set range of each of the eight basic ranges. Note 1: All default basic ranges are restored whenever the depth unit is changed. Therefore, change the depth unit before changing the basic ranges. Note 2: A range may not be lower than the range preceding it. For example, if basic range 3 is 60 feet, basic range 4 must be greater than 60 feet. ZOOM RANGE: Choose the range to zoom in the marker-zoom and bottom-zoom modes. You may choose a range between 7 and 150 feet (2 and 50 meters). B/L RANGE: The expansion width for the bottom-lock display can be chosen from 10 to 30 feet (3 and 10 meters). ZOOM MARKER: The zoom marker appears in the normal, bottom marker and bottom zoom displays and marks the area which is expanded in the bottom marker and bottom zoom pictures. You can turn the marker on or off as desired.

2.2 Installation Menu

The installation menu contains items which once set do not require frequent adjustment. 1. Turn on the power while pressing the [MENU/ESC] key. Continue pressing the [MENU/ESC] key until the Installation menu appears.
Installation Menu SIMULATION TEST. LCD PATTERN. MEMORY CLEAR NMEA PORT NMEA MIX GPS WAAS* : In/Out : Off : Off On
SET BOTTOM LEVEL. * = Setting cannot be changed when NMEA PORT setting is "IN/IN."
Installation menu SIMULATION: The simulation mode provides, without connection of the transducer, simulated operation of the equipment, using internally generated echoes. All controls are operative. The message SIM appears at the top right corner on the screen when the simulation mode is active. 1. At the installation menu, press to open the simulation mode options window. 2. Press to choose On to turn on the simulation mode. 3. Press the [POWER/BRILL] key about three seconds to turn off the power. 4. Press the [POWER/BRILL] key to turn on the power. SIM appears at the top right corner of the display 5. To turn off the simulation mode, select Off at step 2.
TEST: Conducts diagnostic tests. For further details, see paragraph 3.7. LCD PATTERN: Tests the LCD. For further details, see paragraph 3.8 MEMORY CLEAR: The memory can be cleared to start afresh with default menu settings. 1. At the installation menu, press to choose MEMORY CLEAR. 2. Press to open the options window.

3.4 Replacing the Fuse

The fuse in the power cable protects the system from reverse polarity of the power supply and equipment fault. If the fuse blows, find the cause before replacing it. Use only a 1A fuse (FGBO-A 125V 1A, Code No. 000-155-847-10). Using the wrong fuse will damage the unit and void the warranty.
Use the proper fuse. Fuse rating is shown on the equipment. Use of a wrong fuse can result in fire and damage the equipment.
3.2 Cleaning the Display Unit
Dust or dirt on the display unit can be removed with a soft cloth. If desired, a water-moistened cloth may be used. Use special care when cleaning the LCD since it scratches easily. Do not use chemical cleaners to clean the display unit - they can remove paint and markings.
3.5 Battery Voltage Alert
A battery icon appears when the battery voltage is too high or too low. Battery icon and meaning Icon Meaning
Voltage is lower than 10 VDC. If the voltage goes below 9 V, the equipment is automatically turned off. Voltage is higher than 16.5 VDC. If the voltage goes higher than 17.5 V, the equipment is automatically turned off.

3.6 Troubleshooting

The table below provides basic troubleshooting procedures which the user may follow to restore normal operation. Troubleshooting table
If neither echo nor fixed range scale appears no echo appears but the fixed range scale appears echo appears but no zero line sensitivity is low Then check

3.7 Diagnostics

If you feel your unit is not working properly, conduct the diagnostic test to find the problem. If you cannot restore normal operation, contact your dealer for advice. 1. Turn on the power while pressing the [MENU/ESC] key. Continue pressing the [MENU/ESC] key until the Installation menu appears.
battery voltage. fuse. power supply. power cable.
if display advance speed is set to Stop. transducer plug

if range shifting is set

gain setting. if air bubbles or marine
life is clinging to the transducer face. if sediments are present in the water. if the bottom is too soft to return an echo.
SET BOTTOM LEVEL. * = Setting cannot be changed when NMEA PORT setting is "In/In."
Installation menu 2. Press to choose TEST. 3. Press to start the test.

Level bar

ROM : OK RAM : OK NMEA :
there is extreme interference or noise

if the transducer is too

close to the engine. if the unit is properly grounded. if other echo sounders of the same frequency as own are being operated nearby.
the speed/water temperature readout is unrealistic or not present the position readout is unrealistic or not present

Keep the display unit out of direct sunlight. The temperature and humidity should be moderate and stable. Locate the unit away from exhaust pipes and vents. The mounting location should be well ventilated. Mount the unit where shock and vibration are minimal. Keep the unit away from electromagnetic field-generating equipment such as motors and generators. For maintenance and checking purposes, leave sufficient space at the sides and rear of the unit and leave slack in cables. A magnetic compass will be affected if placed too close to the display unit. Observe the following compass safe distances to prevent disturbance to the magnetic compass:
Standard compass: 0.5 meters Steering compass: 0.35 meters
Desktop, overhead mounting
1. Fix the bracket to a desktop or the overhead with tapping screws (supplied). 2. Loosely screw knobs into the display unit. 3. Set the display unit to the bracket and then tighten the knobs.
Air bubbles and turbulence caused by movement of the boat seriously degrade the sounding capability of the transducer. The transducer should, therefore, be located in a position where water flow is the smoothest. Noise from the propellers also adversely affects performance and the transducer should not be mounted nearby. The lifting strakes are notorious for creating acoustic noise, and these must be avoided by keeping the transducer inboard of them. The transducer must always remain submerged, even when the boat is rolling, pitching or up on a plane at high speed.
A practical choice would be somewhere between 1/3 and 1/2 of the boats length from the stern. For planing hulls, a practical location is generally rather far astern, so that the transducer is always in water regardless of the planing attitude.
Typical thru-hull mount transducer installations
Flat Washer Rubber Washer Fairing Block

120 30

Hull Deep-V Hull

Flat Washer Hull

87 Unit: mm 520-5MSD

68 520-5PSD

Rubber Washer

Cork Washer

Thru-hull mount transducer mounting dimensions (millimeters)

Flat Hull

Acceptable transducer mounting locations

DEEP-V HULL

Procedure for installing the thru-hull mount transducer
1. With the boat hauled out of the water, mark the location chosen for mounting the transducer on the bottom of the hull. 2. If the hull is not level within 15 in any direction, fairing blocks made out of teak should be used between the transducer and hull, both inside and outside, to keep the transducer face parallel with the water line. Fabricate the fairing block as shown below and make the entire surface as smooth as possible to provide an undisturbed flow of water around the transducer. The fairing block should be smaller than the transducer itself to provide a channel to divert turbulent water around the sides of the transducer rather than over its face.
Position 1/2 to 1/3 of the hull from stern. 15 to 30 cm off center line (inside first lifting strakes.)

HIGH SPEED-V HULL

Within the wetted bottom area Deadrise angle within 15
Suitable transducer mounting locations
Hole for stuffing tube Upper Half
Lower Half Saw along slope of hull.

D>50 cm

Deep-V Hull
Construction of fairing block 3. Drill a hole just large enough to pass the threaded stuffing tube of the transducer through the hull, making sure it is drilled vertically. 4. Apply a sufficient amount of high quality caulking compound to the top surface of the transducer, around the threads of the stuffing tube and inside the mounting hole (and fairing blocks if used) to ensure watertight mounting. 5. Mount the transducer and fairing blocks and tighten the locking nuts. Be sure that the transducer is properly oriented and its working face is parallel to the waterline. Note: Do not over-stress the stuffing tube and locking nuts through excessive tightening, since the wood block will swell when the boat is placed in the water. It is suggested that the nut be tightened lightly at installation and retightened several days after the boat has been launched.
Transom mount transducer mounting locations
Installing the transom mount transducer on a flat hull
A suitable mounting location is at least 50 cm away from the engine and where the water flow is smooth. 1. Drill four pilot holes in the mounting location. 2. Attach the transducer to the bracket with 5 x 20 tapping screws (supplied). 3. Adjust the transducer position so the transducer faces right to the bottom. Note: If necessary, to improve water flow and minimize air bubbles staying on the transducer face, incline the transducer about 5 at the rear. This may require a certain amount of experimentation for fine tuning at high cruising speeds. 4. Fill the gap between the wedge front of the transducer and transom with epoxy material to eliminate any air spaces.

Centerline

50 cm 50 cm

15 cm 15 cm

Inside-hull transducer mounting location

Attaching the transducer

1. Clean the transducer face to remove any foreign material. Lightly roughen the transducer face with #100 sandpaper. Also, roughen the inside of the hull where the transducer is to be mounted. 2. Warm the silicone sealant to 40C before usage to soften it. Coat the transducer face and mounting location with silicone sealant.
5. Press the [PROG] key to show the pop-up window for automatic/manual selection. 6. Press to choose Manual. 7. Press the [MENU/ESC] key. 8. Press the [GAIN] key to set the gain to 5 and then press the [MENU/ESC] key. 9. Press the [RANGE] key to set the range to 10 meters (feet) and then press the [MENU/ESC] key. 10. If the bottom is displayed in dark gray and the depth indication appears, the mounting location is suitable. Go to Final preparation. 11. If the bottom is not displayed in dark gray tone, the mounting location may be unsuitable. Do the following: a) Press the [POWER/BRILL] key to turn off the power. b) Gently dismount the transducer with a piece of wood. c) Reattach the transducer elsewhere as shown in Attaching the transducer. d) Check the installation again.

Transducer

Silicone Sealant

Final preparation

Support the transducer with a piece of wood to keep it in place while it is drying. Let the transducer dry 24-72 hours.
Coating transducer face with silicone sealant 3. Press the transducer firmly down on the hull and gently twist it back and forth to remove any air which may be trapped in the silicone sealant.

4.5 Optional Triducer

525ST-MSD
The optional triducer 525ST-MSD is designed for thru-hull mounting. For how to install this transducer see paragraph 4.2.
Checking the installation
1. Connect the battery to the display unit. 2. Turn on the display unit. 3. Press the [MODE] key to choose SINGLE FREQ. 4. Choose 50 kHz or 200 kHz, and then press the [MENU/ESC] key to close the mode menu.
Water-based antifouling paint (mandatory in salt water).
Mounting location To ensure the best performance, the sensor must be submerged in aeration-free and turbulence-free water. Mount the sensor close to the centerline of the boat. On slower heavier displacement hulls, positioning it farther from the centerline is acceptable. Allow adequate space above the bracket for it to release and rotate the sensor upward.

parallel

12-18 transom angle NO SHIM NO YES

angle reversed

slight angle

angle too steep

Sensor position and transom angle Note: Do not position the bow of the sensor lower than the stern because aeration will occur. 2. To adjust the sensors angle relative to the hull, use the tapered plastic shim provided. If the bracket has been temporarily fastened to the transom, remove it, Key the shim in place on the back of the bracket. 2-10 transom angle (stepped transom and jet boats): Position the shim with the tapered end down. 19-22 transom angle (small aluminum and fiberglass boats): Position the shim with the tapered end up.

Installation template

for starboard side of boat Drill at locations labeled "B" for the following transom angles: 16 through 22 B A B A B A
Drill at locations labeled "A" for the following transom angles: 2 through 15
Align arrow with bottom of transom
3. If the bracket has been temporarily fastened to the transom, remove it. Apply a marine sealant to the threads of the two #10 x 1-1/4 self tapping screws to prevent water seeping into the transom. Screw the bracket to the hull. Do not tighten the screws completely at this time. 4. Repeat step 1 to ensure that the angle of the sensor is correct. Note: Do not position the sensor farther into the water than necessary to avoid increasing drag, spray, and water noise and reducing boat speed.
5. Using the vertical adjustment space on the bracket slots, slide the sensor up or down to provide a projection of 3 mm (1/8). Tighten the screws.

Cable cover Cable clamp

50 mm (2") Hull projection 3 mm (1/8")
Vertical adjustment and cable routing
Attaching the sensor to the bracket 1. If the retaining cover near the top of the bracket is closed, open it by depressing the latch and rotating the cover downward.
Step 1 Latch Pivot arm (2) Step 2

Retaining cover

Slot (2)

Step 3 Step 4

Attaching the sensor to the bracket 2. Insert the sensors pivot arms into the slots near the top of the bracket. 3. Maintain pressure until the pivot arms click into place. 4. Rotate the sensor downward until the bottom snaps into the bracket. 5. Close the retaining cover to prevent the accidental release of the sensor when the boat is underway. Cable routing Route the sensor cable over the transom, through a drain hole, or thorough a new hole drilled in the transom above the waterline. Never cut the cable or remote the connector; this will void the warranty. Always wear safety goggles and a dust mask.
1. If a hole must be drilled, choose a location well above the waterline. Check for obstructions such as trim tabs, pumps, or wiring inside the hull. Mark the location with a pencil. Drill a hole through the transom using a 19 mm or 3/4 bit (to accommodate the connector). 2. Route the cable over or through the transom. 3. On the outside of the hull secure the cable against the transom using the cable clamps. Position a cable clamp 50 mm(2) above the bracket and mark the mounting hole with a pencil. 4. Position the second cable clamp halfway between the first clamp and the cable hole. Mark this mounting hole. 5. If a hole has been drilled in the transom, open the appropriate slot in the transom cable cover. Position the cover over the cable where it enters the hull. Mark the two mounting holes. 6. At each of the marked locations, use a 3 mm or 1/8 bit to drill a hole 10 mm (3/8) deep. The prevent drilling too deeply, wrap masking tape around the bit 10 mm (3/8) from the point. 7. Apply marine sealant to the threads of the #6 x 1/2 self-tapping screw to prevent water from seeping into the transom. If you have drilled a hole through the transom, apply marine sealant to the space around the cable where it passes through the transom. 8. Position the two cable clamps and fasten them in place. If used, push the cable cover over the cable and screw it in place. 9. Route the cable to the instrument being careful not to tear the cable jacket when passing it though the bulkhead(s) and other parts of the boat. To reduce electrical interference, separate the sensor cable from other electrical wiring and noise sources. Coil any excess cable and secure it in place with zip-ties to prevent damage.

For Internal Use Only Serial No. 8031Checked By:

PACKING LIST FOR LS6100

Box 1 - LS6100 Part No. 1 LSOME-236-90Z 3 000-145-100-298-000-790-100-298-000-804-000-802-100-298-000-549-061 Wt: 5 lbs. Dim: 12"x 13"x 6" Description Quantity 6" LCD Dual Frequency E/S 1 Operator's Manual 1 Power Cable w/ Plug 1 Plastic Facia Cover 1 Mounting Bracket 1 Mounting Knob 2 Screw M4x20 (Flush Mount) 4 Screw Self Tapping 4 Template 02-139-1035-Fuse FGBO 1A 1

Tech Date LS6100 Remarks

rev 6/04 Page 1 of 1