Garmin Fish Finder 140 User Manual

Owner’s Manual  
Fishfinder 90/140  
full feature sona
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Introduction  
The Operating Your Fishfinder section describes the  
features and operation of the Fishfinder 90/140.  
Introduction  
This manual covers the features and operation of the  
Fishfinder 90/140.  
The Appendix contains unit specifications ,optional  
accessories, and care information. You can also find  
warranty information, the Software License Agreement and  
European Licensing Requirements in the Appendix.  
About This Manual  
To get the most out of your Fishfinder 90/140, take time to  
read this manual and learn the operating procedures for your  
unit in detail. This manual is organized into the following  
sections.  
An Index is provided at the end of the manual for reference.  
Manual Conventions  
This manual uses the term Warning to indicate a potentially  
hazardous situation, which, if not avoided, could result in  
death or serious injury.  
The Introduction sections contains the Table of Contents,  
Product Registration, and Product Support Information.  
The Getting Started sections contain information about  
sonar and the Fishfinder.  
This manual uses the term Caution to indicate a potentially  
hazardous situation, which, if not avoided, may result  
in minor injury or property damage. It may also be used  
without the symbol to alert you to avoid unsafe practices.  
The Installing Your Fishfinder section provides instruction  
on installing the Fishfinder and the Transducer. If you  
experience difficulty installing the Fishfinder, contact  
Garmin Product Support or an installation professional in  
your area.  
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Introduction  
Table of Contents  
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Introduction  
Product Registration  
Help 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.  
Contact Garmin  
Contact Garmin Product Support if you have any questions  
while using your Fishfinder 90/140. In the USA, go to  
www.garmin.com/support, or contact Garmin USA by  
phone 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 for in-country support information,  
or contact Garmin (Europe) Ltd. by phone at +44 (0)  
870.8501241.  
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Introduction  
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 90/140 to all available navigation sources, including information  
from visual sightings, and maps. For safety, always resolve any discrepancies or questions before continuing navigation.  
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Getting Started  
you might want to learn a bit about sonar: what it is, how it  
works, and what you might see on the Fishfinder 90 or 140  
screen. This manual does not go into technical detail about  
sonar, but it can give you a general understanding of those  
things that you need to know about sonar that can help you  
interpret the screen and find the fish.  
Getting Started  
To get the most out of your new Fishfinder:  
Before you install and use your Fishfinder, read the  
information in this manual.  
Assemble and install the hardware (page 5).  
Practice using your Fishfinder in Simulator Mode  
(page 4).  
Understanding Sonar  
During installation, you connect your Fishfinder 90 or 140  
to a transducer. The transducer uses sound to determine  
information about what is in the water beneath your boat.  
Then the transducer sends the information to your Fishfinder  
to be displayed on the screen for you to view and interpret.  
Use the Fishfinder (page 14).  
Understanding the Fishfinder  
The Fishfinder 90 or 140 is a fully automatic sonar unit  
that allows you to go out on the water and find fish without  
having to configure a lot of settings; or, if from experience  
you know exactly how you want your Fishfinder screen to  
look and function, you can customize each setting to your  
specific needs.  
The transducer sends sound waves down into the water  
in a cone shape, similar to a flashlight beam (covering a  
smaller circular area at the top and angling out to a larger  
circular area at the bottom). These sound waves reflect off  
of any object that they hit, and then the waves travel back  
up to the transducer. These objects could be fish, branches,  
the bottom, or any other object that has density that is  
different from the water. The transducer receives the sound  
If you have used a Fishfinder before, and you know how  
to interpret the sonar information on the screen, you can  
skip this section. If you have not used a Fishfinder before,  
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Getting Started  
wave information, and then sends the information to the  
Fishfinder. The Fishfinder displays the information on the  
screen for you to see and interpret. The type of transducer  
and settings you choose determine how the information is  
shown on the screen.  
Understanding Dual Beam Transducer  
Coverage  
Narrow  
Beam  
Wide  
Beam  
A dual beam transducer can transmit a narrow or a wide  
beam. The water area covered by the transmitted sound  
waves is determined by the beam width of the transducer  
and the water depth. The narrow beam provides crisp detail  
of what is under your boat, and is helpful if you are fishing  
in deeper water where the beam covers more area (for  
example, at a 30-foot depth, the narrow beam covers the  
area of about a 7-foot circle).  
The wide beam is more helpful in shallow water, because  
it gives you a much wider view of objects in the water,  
including areas beyond the sides of your boat. At a 30-foot  
depth, the wide beam covers the area of approximately a  
20-foot circle.  
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Getting Started  
Depth range  
Understanding the Fishfinder Screen  
Experimentation and experience are the keys to successfully  
interpreting your Fishfinder screen. We recommend that you  
take your Fishfinder out on familiar water, and spend time  
learning to interpret what you see on the Fishfinder 90 or  
140 screen.  
Water depth  
Water  
temperature at  
the transducer  
You see  
suspended targets  
as arches or fish  
symbols.  
Think of the Fishfinder screen as if you took a picture  
from the side of an aquarium in your home. You can see  
how deep a fish is in the water (how close it is to the top  
or bottom), but you cannot tell where the fish is located  
horizontally in the water (whether it is near the front or the  
back of the aquarium). Remember this when you are trying  
to locate exactly where something is in the water.  
Structure  
Simulator  
mode  
indicator  
Bottom shape and type  
The strongest sonar returns appear on your screen as solid,  
dark areas. The weakest returns appear less intense, less  
solid. The bottom of the water body returns the strongest  
signal, so you can identify the bottom as the continuous,  
solid line running across the bottom of the screen. The  
strength of the sonar return can also help you interpret the  
hardness of the bottom. The thicker the bottom line, the  
harder the bottom.  
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Getting Started  
The Fishfinder 90 and 140 include the latest technology  
in interpreting bottom signals; they can see through fish,  
structures, and thermoclines (shown in the weakest hues).  
Even so, large schools of fish or dense structures close to  
the bottom can affect water depth return readings.  
instead of arches (page 17).  
Using Simulator Mode  
Use Simulator Mode to practice and learn the operation of  
the Fishfinder. If the Fishfinder does not detect a transducer  
at startup, it automatically starts in Simulator Mode.  
NOTE: If the Fishfinder is unable to track the bottom for  
any reason, the digits which indicate depth flash on and off  
to alert you that the Fishfinder is not tracking the bottom.  
While in Simulator Mode, the Fishfinder displays a bottom  
scene, and you can control the Fishfinder (except the Gain  
and Auto Gain options) just as if it were on the water.  
If no keys are pressed for two minutes, the Fishfinder  
automatically resets to default settings while in Simulator  
Mode.  
Along the top of the screen, you might see a grouping of  
intense hues. This area is surface clutter, which can be  
caused by waves or any other sonar interference at the  
surface of the water. Too much surface clutter can obscure  
your view of fish. You can turn down the Gain setting to  
reduce this surface clutter (page 15).  
To exit Simulator Mode, turn off the Fishfinder.  
You can see in the previous illustration how the fish are  
indicated in a few different ways. By default, fish appear  
as arches. Actual fish returns might not always appear as  
perfect arches, due to the speed, fish orientation, or other  
conditions. You can also turn on the Fish Symbols setting if  
you want to see suspended targets indicated by a fish shape  
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Installing Your Fishfinder  
E
F
Installing Your Fishfinder  
A
Make sure you completely read and understand all  
instructions before you install and use your Fishfinder. If  
you have problems, contact Garmin Product Support, or  
seek other professional assistance.  
B1  
D
(Fishfinder 140)  
B2  
C
You can install the Fishfinder hardware on a transom or on  
a trolling motor. Before installation, make sure the wiring  
harness can reach the Fishfinder and transducer locations.  
(Fishfinder 90)  
(Fishfinder 90)  
G
Check the packing list below. If you are missing any items,  
contact your Garmin dealer.  
S
H
Packing List (one of each, unless otherwise noted):  
(Cable not shown)  
AFishfinder sonar unit  
ITrolling motor mount gasket  
I
B1Swivel mount bracket (Fishfinder  
140; optional for Fishfinder 90); or  
B2Tilt mount bracket (Fishfinder 90)  
CSwivel base (Fishfinder 140)  
DMounting knobs  
EMounting knob spacer  
FSnap ring  
GTransducer with power cable  
HTransducer mount  
J5 mm Flat washers (2)  
K5 x 30 mm Screws (2)  
L10-32 Lock nut  
M4 x 12 mm Screws (4)  
N10-32 x 1.75 Screw  
O1/4" Cable clamps (2)  
PPlastic spacer  
Q1/4" Rubber washer  
RCable tie, 5.6" (4)  
SCable tie, 20”  
J
K
L
N
O
P
R
Q
M
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Installing Your Fishfinder  
Mounting the Transducer on a  
Trolling Motor  
Installing the Transducer  
Assembling the Transducer  
1. Slide the large cable tie (S) through the slot on the  
transducer mount (H) with the ridges of the band facing  
up until equal lengths extend on both sides of the mount.  
(NOTE: For cold water, or heavy timber or debris areas,  
a metal 4-5" worm gear clamp is recommended.)  
1. Insert the rubber washer (Q) and plastic spacer (P) into  
the transducer (G) at the same time. DO NOT lubricate  
the rubber washer.  
2. Route the cable toward the back of the transducer. Slide  
the transducer into the transducer mount (H).  
2. Position the mount gasket (I) on the curved top of the  
transducer mount.  
3. Place a 5 mm flat washer (J) on the 10-32 x 1.75" screw  
(N), and insert the screw through the transducer mount,  
spacer, and rubber washer.  
3. Place the transducer assembly against the motor body of  
the trolling motor, with the front of the  
transducer pointed away from the  
4. Place the remaining 5 mm flat washer on the exposed  
end. Install the 10-32 lock nut (L) finger tight. You can  
tighten the transducer further after installation on the  
boat.  
trolling motor propeller.  
Back of the transducer  
Cable tie  
slot  
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Installing Your Fishfinder  
4. Wrap the two ends of the cable tie around the motor  
body. Place the pointed end of the cable tie through the  
fastener hole on the opposite end and pull it through until  
it is snug but not tight. (The cable tie clicks when you pull  
it.)  
Mounting the Transducer on a Transom  
Tool List (not included)—drill, 3/8" wrench or socket,  
5/32" and 1/8" drill bits, masking tape, #2 Phillips  
screwdriver, and marine sealant.  
When selecting a transom mount location, consider the  
following for optimal performance:  
5. Position the transducer so that it is parallel with the  
bottom when in use, and make sure the gasket is aligned  
properly. Pull the cable tie end until tight. Trim off the  
excess, if necessary. Tighten the 10-32 locking nut until  
it touches the mounting bracket and then tighten 1/4 turn  
more. (Do not overtighten.)  
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.  
6. Route the 20’ (6 m) transducer cable using the supplied  
cable ties to secure the cable to the motor shaft. You  
can fill the forward-facing portion (except the cable tie  
pocket) of the transducer mount with sealant to avoid  
accumulating debris.  
Mount the transducer as close to the center of the boat as  
possible.  
DO NOT cut the transducer lead. (This voids your  
warranty.)  
DO NOT mount the transducer in locations where it  
might be jarred when launching, hauling, trailering, or  
storage.  
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Installing Your Fishfinder  
DO NOT mount the transducer in the path of the prop on  
single-drive boats. The transducer can cause cavitation  
that can degrade the boat’s performance and damage the  
prop. On twin-drive boats, mount the transducer between  
the drives, if possible.  
Do not mount the transducer behind  
strakes, rivet lines, struts, fittings, water  
intakes or discharge ports.  
Mount the transducer  
parallel with the water line.  
Make sure the transducer is below  
water level when the boat is on plane  
at high speed.  
Apply marine sealant to all screw threads to prevent  
water from seeping into the transom.  
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Installing Your Fishfinder  
5. Place the first cable clamp on the transducer cable  
To mount the transducer on a transom:  
1. Position the transducer mount at the selected transom  
location. Make sure the transducer is parallel with the  
water line. Mark the center locations of each hole on the  
transducer mount. (See the figures on the next page.)  
approximately one third of the distance between the  
transducer and the top of the transom. Mark the location.  
Using a 1/8" bit, drill a pilot hole approximately 3/8" (10  
mm) deep.  
2. Using a 5/32" bit, drill the pilot holes approximately 1"  
(25 mm) deep at the marked locations. To avoid drilling  
the holes too deep, wrap a piece of tape around the bit  
at 1" from the point of the bit.  
6. Attach the cable clamp using a 4 x 12 mm screw. Coat  
the screw with marine sealant before installation. Repeat  
steps 5 and 6 using the other cable clamp.  
7. Route the transducer cable, as needed, to the Fishfinder.  
DO NOT CUT THE CABLE. Avoid routing the cable with  
electrical wires or other sources of electrical interference.  
3. Apply marine sealant to the 5 x 30 mm screws. Attach  
the transducer assembly to the transom using the 5 x 30  
mm screws. Adjust the transducer assembly to extend  
beyond the bottom of the transom approximately 1/8"  
(3 mm) on fiberglass hulls or 3/8" (10 mm) on aluminum  
hulls. Adjust the transducer assembly to be aligned  
parallel with the water.  
4. Tighten the 10-32 locking nut until it touches the  
mounting bracket, and then tighten 1/4 turn more. (Do  
not overtighten.)  
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Installing Your Fishfinder  
Drill pilot holes here.  
Level  
Installing the Fishfinder Unit  
Selecting a Fishfinder installation Location  
Select a Fishfinder installation location that allows you to  
view and operate it easily while operating the vessel. Select  
a mounting surface strong enough to support the weight  
of the Fishfinder and protect it from excessive vibration or  
shock. DO NOT mount the bracket in a location where the  
Fishfinder is exposed to extreme temperature conditions.  
When installing the mounting bracket, be sure to allow  
room to connect and rout the power cable.  
Align with the  
transom bottom. The  
transducer should  
extend 1/8" below  
fiberglass hulls or  
3/8" below aluminum  
hulls.  
Keep it parallel with the water line.  
Mounting the Bracket Assembly  
OK  
Tool List (not included)—drill, screwdriver (Phillips or  
standard), three #8 pan-head machine bolts with matching  
nuts and washers, and a 5/32" drill bit; or three #8 pan-head,  
self-tapping screws and a 1/16" drill bit.  
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Installing Your Fishfinder  
To mount the bracket assembly:  
To install the Fishfinder on the mount bracket:  
1. Align the slot on the back of the Fishfinder with the long  
mounting knob, and slide the Fishfinder into place. If  
necessary, adjust the long knob to spread the bracket  
arms apart. (Turn counter-clockwise to widen the bracket  
arms and clockwise to tighten.)  
1. Using the tilt mount bracket (Fishfinder 90) or the  
swivel base (Fishfinder 140; Fishfinder 90 option) as a  
template, mark the location of the three holes that you  
use to secure the bracket to the mounting surface.  
2. If securing the base with machine bolts, drill three 5/32"  
holes at the locations you marked; or, if securing the  
base using self-tapping screws, drill 1/16" starter holes  
at the locations you marked. Drill starter holes no deeper  
than half the screw length.  
2. Adjust the Fishfinder angle, and tighten the long  
mounting knob until snug.  
3. For the Fishfinder 140 (Fishfinder 90 option), rotate  
the swivel mount bracket by twisting it left or right. The  
bracket clicks as you turn it. Select a good viewing  
angle, and then tighten all knobs.  
3. Secure the tilt mount bracket or swivel base with three  
bolts or screws. DO NOT OVERTIGHTEN.  
4. If you are using the swivel mount, place the swivel mount  
bracket over the swivel base and secure it with the short  
knob.  
Swivel mount bracket  
Tilt mount bracket  
Swivel base  
(Fishfinder 140;  
Fishfinder 90 option)  
(Fishfinder 90)  
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Installing Your Fishfinder  
3. Install the black (-) wire on the negative fuse holder or  
battery terminal.  
Installing the Wiring Harness  
The Fishfinder comes with a wiring harness that connects  
the Fishfinder to power and the transducer with one  
easy-to-remove connection. If it is necessary to extend the  
power wires, use 22 AWG wire. DO NOT cut the transducer  
cable, because this voids your warranty. If your boat has an  
electrical system, you might be able to wire the Fishfinder  
directly to an unused holder on your current fuse block. If  
you are using the boat’s fuse block, remove the in-line fuse  
holder supplied with the Fishfinder. You can also wire the  
Fishfinder directly to the battery.  
4. Install a 2 Amp fuse in the fuse holder (fuse block only).  
5. Align the notches on the cable plug and on the back of  
the Fishfinder. Insert the cable into the connector and  
turn the lock ring counter-clockwise until it stops.  
CAUTION: The Fishfinder input voltage is 10–18 volts  
DC. Do not exceed this voltage, because this can damage  
the Fishfinder and void the warranty.  
To install the wiring harness:  
1. Determine the polarity of the power source using a test  
light or volt meter.  
2. Install the red (+) wire on the positive fuse holder or  
battery terminal.  
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Installing Your Fishfinder  
To test the transom mount installation:  
Testing the Transom Mount  
Installation  
1. Begin testing the installation at a slow speed. If the  
sonar appears to be working properly gradually increase  
the boat’s speed observing the sonar’s operation. If  
the sonar signal suddenly is lost or the bottom return is  
severely degraded, note the speed at which this occurs.  
Perform this test after you install the Fishfinder. Because  
you need water to carry the sonar signal, the Fishfinder  
does not function properly with the transducer out of the  
water. When you place your boat in the water, CHECK FOR  
LEAKS around the screw holes that are below the water  
line. DO NOT leave your boat in the water for an extended  
period of time without checking for leaks.  
2. Return the boat to the speed at which the signal was  
lost. Make moderate turns in both directions, and see if  
the signal improves.  
3. If the signal strength improves while turning, adjust the  
transducer so that it extends another 1/8" below the  
transom of the boat. It might take several adjustments to  
eliminate the degradation.  
4. If the signal does not improve, it might be necessary to  
move the transducer to a different location.  
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Operating Your Fishfinder  
Understanding Basic Functions  
To turn on the Fishfinder:  
Operating Your Fishfinder  
Press and release the Power key.  
To turn off the Fishfinder:  
Press and hold the Power key.  
Arrow keys—the up and down Arrow  
keys select an item on a menu. Only  
the Fishfinder 140 has the right and left  
Arrow key that cycles through the Main  
menu options.  
To change the backlight level:  
Press the Power key repeatedly to cycle between off,  
low, and high.  
To view or change settings for your Fishfinder, use the Main  
menu and the Setup menu.  
ENTER key—confirms a selection.  
MENU key—shows or exits a menu.  
To change a setting:  
1. Press MENU. The Main menu appears.  
ENTER  
MENU  
2. Use the Arrow keys to move the selection arrow to an  
option, and press ENTER. The settings appear.  
If you select Setup, the Setup menu appears. See  
“Using the Setup Menu” on page 16.  
Power key—turns the Fishfinder on or  
off and controls the screen backlight.  
(Fishfinder 140 is shown.)  
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Operating Your Fishfinder  
3. To select a setting, use the Arrow keys to move the  
selection arrow, and press ENTER. (When you reach  
the end of a menu, the selection arrow wraps to the  
beginning.) Press and hold an Arrow key to rapidly  
advance the selection speed.  
To quickly change a setting for the current option  
that appears in the upper-left corner of the screen (for  
example, the Range option in the above screen), press an  
Arrow key.  
Options and Settings  
4. To close a setting or a menu, press MENU.  
The following settings reset to the system defaults each time  
you turn on the Fishfinder.  
Using the Main Menu  
From the Main menu, you can change the Range, Gain,  
Scroll, Zoom, and View settings.  
Range—sets the maximum depth that you want the  
Fishfinder to display. Auto (default) automatically tracks  
the bottom, or you can set the range, 5–600 feet.  
To view the current menu settings, press MENU.  
Gain—controls the sensitivity of the Fishfinder’s sonar  
receiver. Auto (default) automatically sets the sonar  
sensitivity, or you can set the gain. To see more detail on the  
screen, increase the receiver sensitivity by selecting a higher  
gain. If there is too much detail or if the screen is cluttered,  
lower the sensitivity (lower the gain) to increase the clarity  
of the screen.  
To exit any window, press MENU.  
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Operating Your Fishfinder  
Scroll—sets the rate that the graph scrolls from right to  
left. If you are sitting still or the graph is moving too fast,  
slowing or pausing the graph can help. The settings are  
Ultra, Fast (default), Medium, Slow, and Paused.  
Using the Setup Menu  
To access the Setup menu:  
Press MENU. Use the Arrow keys to move the selection arrow to Setup, and  
press ENTER. The options appear.  
Zoom—sets the zoom level for the screen. Off is the  
default.  
Options and Settings  
Your changes to the following settings are used until you  
set the System Defaults option to Yes.  
View—when you select a 2X or 4X Zoom setting, you  
can select a specific area to view on the screen. You can  
also allow the Fishfinder to automatically select a zoomed  
viewing area based on the bottom.  
Alarms  
Battery—controls an alarm that sounds when the battery is  
reaching a critical state of discharge. The settings are  
Off (default) and 8.516.0 volts remaining.  
Shallow—sets an alarm for a shallow water warning at a  
specific depth. The settings are Off (default) and 1.0–600  
feet.  
Deep—sets an alarm for a deep water warning at a specific  
depth. The settings are Off (default) and 1.0–600 feet.  
Fish—turns on or off (default) an alarm that sounds when  
the Fishfinder detects what it determines to be a fish.  
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Operating Your Fishfinder  
the sides of the boat. You can also choose Narrow (default)  
beam.  
Graphs  
Fish ID—sets how the Fishfinder shows underwater  
targets and background information. If you select a  
fish symbol, the screen shows only the information  
related to that symbol (large, medium, and small sizes).  
When using wide beam, fish symbols that are to the  
sides of the boat appear hollow. Those that are directly  
below the boat appear as solid black fish symbols.  
Whiteline—sets how the Fishfinder shows information  
about the bottom type.  
Off—the bottom return appears as solid black.  
(default) the Fishfinder does not interpret the sonar  
return data. Fish appear as arches  
Whiteline On  
Whiteline Off  
Suspended targets appear as symbols. No background  
information appears  
On (default)—the bottom return appears as a grayscale  
pattern and can help to determine bottom hardness.  
A hard bottom displays a thicker bottom layer. A soft  
bottom appears as a thinner bottom layer.  
Same as previous with the target depth shown.  
Suspended targets appear as symbols. Background  
information appears, making the distinction between  
fish and structure easier.  
Same as previous with target depth shown.  
Beam—controls the angle of the transducer beam. Wide  
beam allows you to see more fish in shallow water, even off  
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Operating Your Fishfinder  
Auto Gain—controls the aggressiveness of the Auto Gain.  
The higher the setting, the greater the number of targets  
appear on the screen. The lower the setting, the less clutter  
on the screen. The settings are High, Medium (default), and  
Low.  
Units  
Depth—sets the measurements in Feet (default), Meters, or  
Fathoms.  
Temperature—sets the water temperature units. The  
settings are Fahrenheit (default) and Celsius.  
Numbers  
System  
Size—sets the appearance of depth, temperature, and battery  
numbers. The settings are Small and Large (default).  
Simulator—controls the simulator mode. The settings are  
Off and On (default). See page 4 for more information.  
Battery—sets whether the current battery voltage appears  
on the screen. The settings are Hide (default) and Show  
Language—sets your language choice.  
Beeper—controls all Fishfinder sounds. The settings are  
Off and On (default).  
Water Temperature—sets whether the water temperature  
appears on the screen. This appears only if you have a  
temperature-capable transducer. The settings are Hide and  
Auto (default).  
Contrast—adjusts the contrast of the screen to compensate  
for light levels or viewing angles. Use the Arrow keys to  
increase or decrease the screen contrast.  
Defaults—restores all default settings.  
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Appendix  
Input: 10 to 18 VDC with high voltage protection  
Appendix  
Sonar Power Output: 100 watts (RMS), 800 watts (peak-to-peak)  
Frequency: 80 kHz (wide) and 200 kHz (narrow)  
Specifications  
Depth: 600 foot max depth. (Depth capacity is dependent on water  
Fishfinder 90  
salinity, bottom type, and other water conditions.)  
Size: 4.7" W x 4.9" H x 2.43" D (11.9 x 12.4 x 6.1 cm)  
Specifications are subject to change without notice.  
Weight: 15.5 oz (.439 kg)  
Display: 2.0" W x 3.3" H (5.0 x 8.4 cm), 3.9" (9.9 cm) diagonal,  
64 x 128 pixels, black-and-white FSTN display  
Optional Accessories  
Purchase the following optional accessories on the Garmin Web site:  
Usage: 3.5 watts maximum, Nominal: 12 VDC @ 0.15 Amps  
Swivel mount for the Fishfinder 90—allows your Fishfinder 90 to tilt  
and swivel on its mounting bracket.  
Fishfinder 140  
Size: 6.1" W x 4.9" H x 2.6" D (15.5 x 12.5 x 6.6 cm)  
Portable case with battery pack and suction mount transducer—  
makes your Fishfinder portable, so that it can go on any boat, with no  
installation (requires eight D-cell batteries, not included).  
Weight: 18.7 oz. (.530 kg)  
Display: 3.2" W x 3.1" H (8.1 x 7.9 cm), 4.7" (9.9 cm) diagonal,  
Flush mounting kit—mounts your fishfinder flush on the bulkhead or  
cabin wall. Press the side clips to release the Fishfinder so you can take it  
with you.  
128 x 240 pixels, 4-level gray scale FSTN display  
Usage: 8 watts maximum, Nominal: 12 VDC @ 0.5 Amps  
Protective cover—protects your product when you are not using it.  
Fishfinder 90 and Fishfinder 140  
Case: Fully Gasketed, high-impact plastic alloy Waterproof: IEC 529,  
level IPX-7 (submerged to 1 meter for 30 minutes)  
Caring for the Fishfinder  
The Fishfinder case is constructed of high quality materials  
and does not require user maintenance except cleaning.  
Temperature Range: +5°F to 158°F (-15°C to 70°C)  
Internal memory backup to retain user settings  
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Appendix  
WARNING: The Fishfinder screen is coated with a special  
anti-reflective coating which is very sensitive to skin oils,  
waxes, and abrasive cleaners. CLEANERS CONTAINING  
AMMONIA WILL HARM THE ANTI-REFLECTIVE  
COATING. It is very important to clean the screen using  
an eyeglass lens cleaner which is specified as safe for anti-  
reflective coatings and a clean, lint-free cloth.  
Cleaning the Case  
Clean the Fishfinder’s outer casing (except for the screen)  
using a cloth dampened with a mild detergent solution, and  
then wipe it dry. Avoid chemical cleaners and solvents that  
may damage plastic components.  
Cleaning the Screen  
Storage  
The Fishfinder screen should be cleaned using a soft, clean,  
lint-free cloth. Water or eyeglass cleaner can be used if  
needed. If these are used, apply the liquid to the cloth and  
then gently wipe the screen with the moistened cloth.  
Do not store the Fishfinder where prolonged exposure to  
temperature extremes may occur (such as in the trunk of a  
car), because permanent damage may result.  
Water Immersion  
The Fishfinder is waterproof to IEC Standard 60529 IPX7.  
It can withstand immersion in 1 meter of water for 30  
minutes. Prolonged submersion can cause damage to the  
Fishfinder. After submersion, be certain to wipe and air dry  
the Fishfinder before reuse.  
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Appendix  
Software License Agreement  
BY USING THE FISHFINDER YOU AGREE TO BE BOUND BY THE  
TERMS AND CONDITIONS OF THE FOLLOWING SOFTWARE  
LICENSE AGREEMENT. PLEASE READ THIS AGREEMENT  
CAREFULLY.  
Limited Warranty  
This Garmin product is warranted to be free from defects in materials or  
workmanship for one year from the date of purchase. Within this period,  
Garmin will, at its sole option, repair or replace any components that fail  
in normal use. Such repairs or replacement will be made at no charge  
to the customer for parts or labor, provided that the customer shall be  
responsible for any transportation cost. This warranty does not cover  
failures due to abuse, misuse, accident, or unauthorized alteration or  
repairs.  
Garmin grants you a limited license to use the software embedded in  
this device (the “Software”) in binary executable form in the normal  
operation of the product. Title, ownership rights, and intellectual property  
rights in and to the Software remain in Garmin.  
This product is intended to be used only as a travel aid and must not  
be used for any purpose requiring precise measurement of direction,  
distance, location, or topography. Garmin makes no warranty as to the  
accuracy or completeness of map data in this product.  
You acknowledge that the Software is the property of Garmin and  
is protected under the United States of America copyright laws and  
international copyright treaties. You further acknowledge that the  
structure, organization, and code of the Software are valuable trade  
secrets of Garmin and that the Software in source code form remains a  
valuable trade secret of Garmin. You agree not to decompile, disassemble,  
modify, reverse assemble, reverse engineer, or reduce to human readable  
form the Software or any part thereof or create any derivative works  
based on the Software. You agree not to export or re-export the Software  
to any country in violation of the export control laws of the United States  
of America.  
THE WARRANTIES AND REMEDIES CONTAINED HEREIN  
ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES  
EXPRESS, IMPLIED, OR STATUTORY, INCLUDING  
ANY LIABILITY ARISING UNDER ANY WARRANTY OF  
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,  
STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU  
SPECIFIC LEGAL RIGHTS, WHICH MAY VARY FROM STATE TO  
STATE.  
IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY  
INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL  
DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE, OR  
INABILITY TO USE THIS PRODUCT OR FROM DEFECTS IN THE  
Fishfinder 90/140 Owner’s Manual  
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Appendix  
PRODUCT. SOME STATES DO NOT ALLOW THE EXCLUSION OF  
INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE  
LIMITATIONS MAY NOT APPLY TO YOU.  
International Purchases: A separate warranty is provided by  
international distributors for units purchased outside the United States.  
This warranty is provided by the local in-country distributor and this  
distributor provides local service for your unit. Distributor warranties  
are only valid in the area of intended distribution. Units purchased in the  
United States or Canada must be returned to the Garmin service center in  
the United Kingdom, the United States, Canada, or Taiwan for service.  
Garmin retains the exclusive right to repair or replace the unit or software  
or offer a full refund of the purchase price at its sole discretion. SUCH  
REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY  
FOR ANY BREACH OF WARRANTY.  
Garmin International, Inc.  
1200 East 151st Street,  
Olathe, Kansas 66062, USA  
Tel. (913) 397.8200 or  
(800) 800.1020  
Garmin (Europe) Ltd.  
Liberty House,  
Hounsdown Business Park,  
Southampton, Hampshire, SO40  
9RB UK  
To obtain warranty service, contact your local Garmin authorized dealer  
or call Garmin Product Support for shipping instructions and an RMA  
tracking number. Securely pack the unit and a copy of the original sales  
receipt, which is required as the proof of purchase for warranty repairs.  
Write the tracking number clearly on the outside of the package. Send the  
unit, freight charges prepaid, to any Garmin warranty service station.  
Fax (913) 397.8282  
Tel. +44 (0) 870.8501241 (outside  
the UK)  
Online Auction Purchases: Products sold through online auctions  
are not eligible for rebates or other special offers from Garmin. Online  
auction confirmations are not accepted for warranty verification. To  
obtain warranty service, an original or copy of the sales receipt from the  
original retailer is required. Garmin will not replace missing components  
from any package purchased through an online auction.  
0808.2380000 (within the UK)  
Fax +44 (0) 870.8501251  
Garmin Corporation  
No. 68, Jangshu 2nd Road,  
Shijr, Taipei County, Taiwan  
Tel. 886/2.2642.9199  
Fax 886/2.2642.9099  
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Appendix  
Declaration of Conformity (DoC)  
Hereby, Garmin, declares that this Fishfinder 90/140 is  
in compliance with the essential requirements and other  
relevant provisions of Directive 1999/5/EC.  
To view the full Declaration of Conformity, see the Garmin  
Web site for your Garmin product:  
Fishfinder 90/140 Owner’s Manual  
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For the latest free software updates (excluding map data) throughout the life of your Garmin products, visit  
© 2008 Garmin Ltd. or its subsidiaries  
Garmin International, Inc.  
1200 East 151st Street, Olathe, Kansas 66062, USA  
Garmin (Europe) Ltd.  
Liberty House, Hounsdown Business Park, Southampton, Hampshire, SO40 9RB UK  
Garmin Corporation  
No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan  
December 2008  
Part Number 190-00582-10 Rev. A  
Printed in Taiwan  
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