Garmin 100 User Manual
Fishfinder 100
owner’s
manual
© 1999 GARMIN Corporation
GARMIN International, Inc.
1200 East 151st Street, Olathe, Kansas 66062, U.S.A.
Tel. 913/397.8200 or 800/800.1020
Fax 913/397.8282
GARMIN (Europe) Ltd.
Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9AQ, U.K.
Tel. 44/1794.519944
Fax 44/1794.519222
GARMIN (Asia) Corporation
No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan
Tel. 886/2.2642.9199
Fax 886/2.2642.9099
All rights reserved. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded
or stored in any storage medium, for any purpose without prior written consent of GARMIN Corporation. GARMIN Corporation hereby grants
permission to download a single copy of this manual onto a hard drive or other electronic storage medium to be viewed for personal use, provided
that such electronic or printed copy of this manual contains the complete text of this copyright notice and provided further that any unauthorized
commercial distribution of this manual is strictly prohibited.
Information in this manual is subject to change without notice. GARMIN
Corporation reserves the right to change or improve its products and to make changes in the content without obligation to notify any person or
organization of such changes. Visit the GARMIN website (www.garmin.com) for current updates and supplemental information concerning the use
and operation of this and other GARMIN products.
GARMIN and Fishfinder 100 are registered trademarks of GARMIN Corporation and may not be used without the express permission of GARMIN
Corporation.
December 1999 Part Number 190-00173-00 Rev. A Printed in Taiwan
Thank You for choosing the GARMIN Fishfinder 100. This product is
designed for easy operation and to provide years of reliable service.
Please take the time to read this Owner’s Manual, and learn the
operation of your new unit. This will help ensure that you get the most
from the Fishfinder 100.
If you encounter a problem, or just have a question, contact or Product
Support Department at 913-397-8200, Monday — Friday 8:00 a.m. to
5:00 p.m. Central Time.
Enjoy you new Fishfinder 100 and once again thank you for choosing
GARMIN.
our on-line registration today!
number of your Fishfinder 100 handy and connect
to our website (www.garmin.com). Look for the
Product Registration link on the Home page.
GARMIN product purchase using a mail-in
registration card, we invite you to re-register using
our NEW on-line system. Many services provided
by our new product registration system are now
being automated and re-registering your purchase
ensures you the best possible support from
GARMIN.
Introduction
Customer Service
Product Registration
Help us better support you by completing
Have the serial
Why should you register your Fishfinder 100?
• Notification of Product Updates
• Notification of New Products
• Lost or Stolen unit tracking
NOTE: If you have previously registered your
i
GARMIN Corporation warrants this product to be free from defects in
materials and manufacture for one year from the date of purchase.
Introduction
Limited Warranty
ii
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. The customer is, however, responsible for
any transportation costs. This warranty does not cover failures due to
abuse, misuse, accident or unauthorized alteration or repairs.
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE
EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR
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 PRODUCT. SOME STATES DO
NOT ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL
DAMAGES, SO THE ABOVE LIMITATIONS MAY NOT APPLY TO YOU.
To obtain warranty service, call the GARMIN Customer Service department (913-397-8200) for a returned merchandise tracking number. The unit
should be securely packaged with the tracking number clearly marked on the
outside of the package and sent freight prepaid and insured to a GARMIN
warranty service station. A copy of the original sales receipt is required as the
proof of purchase for warranty repairs. 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.
The Fishfinder 100 Standard Package contains the following items:
• Fishfinder 100
• Surface/Flush Mount Kit
• Wiring Adapter Cable
• Owner’s Manual
• Quick Reference Guide
• *Transom Mount Transducer (w/depth/temp)
* Optional
Optional Transducers:
010-10251-00 Trolling Motor Mount Adapter
010-10252-00 Speed Sensor
010-10107-00 Bronze Thru-Hull (w/depth/temp)
010-10249-00 Plastic Transom Mount (w/depth/temp)
010-10119-00 Plastic Thru-Hull (w/depth)
010-10177-00 Bronze Thru-Hull (w/depth/temp/speed)
010-10224-00 Plastic In-Hull (depth only)
010-10225-00 Remote Temperature Sensor
Accessories:
010-10170-00 10’ Transducer Extension Cable
010-10170-01 20’ Transducer Extension Cable
010-10269-00 Protective Front Cover
Introduction
Packaging and Accessories
iii
Introduction ....................................................................... i-viii
Customer Service ................................................................................................ i
Introduction
Limited Warranty .............................................................................................. ii
Packaging and Accessories ................................................................................ iii
Unit Display ..................................................................................................... vi
Installation .......................................................................... 1-9
Table of Contents
Selecting A Transducer ...................................................................................... 1
Transom Mount Installation ............................................................................... 2
In-hull Installation ............................................................................................. 3
Trolling Motor Installation ................................................................................. 4
Wiring Harness Installation ............................................................................... 5
Wiring to a Fuse Block ................................................................................... 5-6
Display Installation (Surface Mount) ................................................................. 7
Display Installation (Flush Mount) .................................................................... 8
Testing the Installation ...................................................................................... 9
Unit Operation ................................................................ 12-27
Using the Adjustment Bar
Range ............................................................................................................... 12
Zoom ............................................................................................................... 13
View ................................................................................................................ 13
Gain ................................................................................................................. 14
Setup Menu
Chart
Whiteline ......................................................................................................... 16
Scroll Speed ..................................................................................................... 16
Scale ................................................................................................................ 17
Tools
Noise Reject ..................................................................................................... 18
Flasher ............................................................................................................. 19
Simulator ......................................................................................................... 19
Numbers
Number Size .................................................................................................... 20
Battery Voltage ................................................................................................. 20
Temperature .................................................................................................... 21
Speed ............................................................................................................... 21
iv
Alarms
Fish Alarm ....................................................................................................... 22
Shallow Water ................................................................................................. 22
Deep Water...................................................................................................... 23
Battery Voltage ................................................................................................. 23
System
Contrast ........................................................................................................... 24
Beeper ............................................................................................................. 24
NMEA Output ................................................................................................. 24
Calibration
Keel Offset ....................................................................................................... 25
Water Type ....................................................................................................... 25
Units
Depth .............................................................................................................. 26
Temperature .................................................................................................... 26
Speed ............................................................................................................... 26
Memory
Remember ....................................................................................................... 27
Factory Setup .................................................................................................. 27
Software Version .............................................................................................. 27
On the Water ................................................................... 28-33
Understanding Sonar ....................................................................................... 28
Transducer Coverage ....................................................................................... 29
Understanding the Chart ................................................................................. 30
Whiteline ......................................................................................................... 31
Thermoclines ................................................................................................... 32
Simulator Mode ............................................................................................... 33
Appendix ......................................................................... 28-33
Appendix A—Specfications ............................................................................. 34
Appendix B—Alarm Messages and Icons ......................................................... 35
Appendix C—Fishfinder 100 Portable ....................................................... 36-37
Appendix D—Index ....................................................................................... 38-
Introduction
Table of Contents
v
Introduction
What can the Fishfinder 100
Display?
The Fishfinder 100 is able to display a variety of useful information
about the underwater environment. Below are a few things the unit will
help you see.
Water Depth
The unit displays water depth and can provide a warning for shallow or
deep-water conditions.
Battery Voltage*
The unit can display the battery voltage that is available to the unit.
Water T emperatur e*
If equipped with a capable transducer, the unit can display the water
temperature.
Speed Over Water*
If equipped with a capable transducer or Speed Sensor, the unit can
display the boat’s speed over water.
Fish
The unit displays fish as arches or fish symbols and can alert you when
a fish is detected.
Thermocline and Structure
With GARMIN’s See-Thru technology the Fishfinder 100 can display
more than just the thermocline and structure, the unit displays fish in
and below the thermocline, trees, brush and deadfall like you have
never seen before!
Bottom Shape and Type
Garmin’s unique DCG (Depth Control Gain) system provides a clear
graphic representation of the bottom type and its shape.
* requires optional transducer or sensor
vi
Transducers
The transducer acts as the eyes and ears of your new sonar. Proper
transducer selection and installation are critical to the operation of your
unit.
The transducer transmits sound waves toward the bottom in a cone
shape. The larger the cone angle the larger the coverage area at a given
depth. While it is good to see as large of an area as possible, it is best to
select a transducer that suits the water that you are on.
A wide cone angle transducer works best in shallow water. The wide
cone angle provides a large coverage area, but at a decreased bottom
resolution. In deeper water this can result in a large dead zone where fish
cannot be seen.
A narrow cone angle transducer is better suited to deep-water
installations. The narrow cone angle provides a smaller viewing area
(compared to a wide cone angle transducer at the same depth) with
improved bottom resolution and a smaller dead zone.
Included in the Optional Package is a 20° cone angle, temperature
sensing, transom mount transducer. This transducer provides good allaround performance. A variety of optional transducers are available from
your local dealer or GARMIN.
Installation
Selecting a Transducer
Wide cone angle
Narrow cone angle
dead zone
fish not seen
X
X
1
Installation
Mounting the Transducer
DO NOT
mount the transducer behind
strakes, struts, fittings, water intake or
discharge ports, or anything that creates
air bubbles or causes the water to become
turbulent. It is important that the
transducer be in clean (non turbulent)
water for optimal performance.
2
Proper transducer installation is key to getting the best performance
from your new unit. If the transducer lead is too short, extension cables are
available from you GARMIN dealer. DO NOT cut the transducer lead, this
will void your warranty.
Following are some tips and basic installation instructions for three
popular transducers. Detailed installation instructions are provided in the
transducer kits.
Transom Mount Installation
010-10248-00 (depth/temp) Transom Mount Transducer.
Apply marine sealant to all
screw threads to prevent water
from seeping into the transom.
OK
Mount the transducer parallel with the bottom.
Mount the transducer cable cover
well above the waterline.
Transducer should extend 1/8" below
fiberglass hull or 3/8" below aluminum hull
Make sure that the transducer is
below water level when the boat
is on plane at high speed
Do not mount transducer directly in the
path of the prop. The transducer can cause
cavitation that may degrade the boat's performance
and damage the prop.
In-hull Installation
The 010-10224-00 transducer is designed to be mounted inside a
fiberglass hull. The standard plastic transom mount transducer can also be
mounted in this fashion using this method. If using a temperature sensing
transducer, the temperature displayed will reflect the hull temperature.
Selecting a Location
1. The location has to be solid fiberglass, devoid of any air bubbles,
laminates, fillers or dead air space. The location needs to be in an area
of clean water at all speeds. Do not place the transducer over any
strakes or behind any obstruction on the hull that would create
turbulence at speed.
Many modern hulls have a prelocated pocket for In-hull transducer
installation. If you are unsure if your hull is equipped with a prelocated
pocket, contact your hull manufacturer.
Testing the Location
Place the transducer in the water, pointed directly at the bottom and set
unit for optimum performance. Place the transducer in the test device as
show on the side bar. If the sonar performance is significantly
degraded, another location will need to be tested.
Installing 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” tall. Pour about 1/8” of two
part, slow cure epoxy in the dam. Place the transducer in the epoxy,
turning the transducer to work out any air bubbles.
3. Weight the transducer in place and allow to cure for 24 hours.
Installation
Mounting the Transducer
Weight
transducer to
hold it in place
Strip Caulk or
RTV Sealer
Hull Surface
Apply twisting
motion to eliminate
any trapped air
bubbles
Installing the Transducer
PVC Pipe
or a Can
Testing the Location
Weight transducer in place
for at least 24 hours
Fill Pipe or Can
with water or a
light mineral oil
Slow cure two
part epoxy
Strip Caulk or
RTV Sealer Dam
3
Installation
Mounting the Transducer
Cable Ties
Worm Gear
Clamp Band
Slide clamp band through slots on transducer
Trolling Motor Installation
Included in the 010-10251-00 transducer kit you should have:
1. Worm Gear Clamp
2. Cable Ties
3. Transducer
Mounting the Transducer:
1. Loosen the Worm Gear Clamp until end of the band is clear of the worm
gear.
2. Slide the clamp band through the slots on the transducer.
3. Place the free end of the clamp band into the worm gear and tighten
until the band is through the worm gear.
4. Place the clamp and transducer over the body of the trolling motor.
Finish tightening the clamp to secure the transducer to the trolling
motor.
5. Secure the transducer cable to the trolling motor shaft using the
supplied cable ties.
If you are experiencing interference while the trolling motor is
operating, try installing the transducer cable at right angles to the
trolling motor power cables.
4
Wiring Harness Installation
The Fishfinder 100 comes with a wiring harness that connects the unit
to power and the transducer with one easy-to-remove connection. Make
sure the wiring harness will reach the unit before beginning installation.
If it is necessary to extend the power/data wires, use a wire of comparable size and keep your extension as short as possible.
If the transducer lead is too short, DO NOT cut the transducer lead to
lengthen the cable. This will void the warranty. Transducer extension
cables are available in 10’ or 20’ lengths from your GARMIN dealer.
Installation
Installing the Wiring Harness
10-18 Volt Boat Supply
Wiring to a Fuse Block
If your boat has an electrical system, it may be possible to wire the unit
directly to an unused holder on your current fuse block. If you are using
Install 2-Amp Fuse
the boat’s fuse block, remove the in-line fuse holder supplied with the unit.
Installing the Wiring Harness:
1. Determine the polarity of the fuse holder using a Test Light or Volt Meter.
2. Install the Red (+) wire on the Positive Fuse Holder Terminal.
3. Install the Black (-) wire on the Negative Fuse Holder Terminal.
4. Install a 2 amp fuse in the Fuse Holder.
During a typical installation, only the Red and Black wires are used. The
Blue wire supplies NMEA data, and doesn’t have to be connected for
normal operation of the unit.
Continued on page 6
+
2A
-
Boat Ground
Red Wire
Black Wire
5
Installation
Installing the Wiring Harness
Power/Data
Connection
Wiring Harness Installation (continued)
If your boat does not have a fuse block, the unit can be wired directly
to the battery. Make sure the 2-Amp in-line fuse supplied with the unit is
installed.
The Fishfinder 100 can be connected to another piece of NMEA
compatible electronic equipment. If equipped with a capable transducer,
the Fishfinder 100 sends depth, temperature and speed information that
could be displayed on another device.
Speed Temp Transducer
Connecting a Transducer to Multiple Sensors
6
2-Amp In-Line Fuse
Display Installation (Surface Mount)
The Fishfinder 100 can be mounted to a flat surface using the supplied
Surface Mounting Bracket.
Installation
Surface Mounting the Display:
1. Position the Surface Mount in the desired location. Leave approximately
2'’ behind the unit for cable clearance.
2. Mark the location of the four mounting holes with a pencil.
3. Drill pilot holes for the mounting fasteners (not included in kit).
4. Secure the Surface Mount, using the mounting fasteners.
5. Slip the unit into the surface mount bracket.
6. Tighten the knobs to secure the unit to the bracket.
The Surface Mount Bracket is designed to be secured using a flat head
screw. If you use a screw with a countersunk head you risk damaging
the Surface Mount Bracket.
OK
Installing the Display
Surface Mount Bracket
7
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