Echo sounding – How it works (inside front cover)
FishFinder L470 – Features and functions i
For information and service ii
1Introduction 1
About the FishFinder L470 1
System Components 2
Standard Equipment 2
Standard Transducers 2
Optional Accessories 2
2Installation 4
About the Transducer 4
Selecting the Correct Type of Transducer 5
Assembling the Transducer Bracket 6
Positioning the Transom-Mount Transducer 6
Mounting the T r ansom-Mount Transducer 9
Mounting the Optional Sidelooker Transducer Transom-Mount Installation 10
Installation Notes – Thru-Hull Transducer 11
Installation Notes – In-Hull Transducer 12
Installation Notes – Trolling Motor Transducers 13
Installation Notes –
Transducer for Speed and Temperature Only 14
EMC Installation Guidelines 14
Mounting the Display Unit – Standard Mount 16
Dismounting the Display Unit 16
Mounting the Display Unit – Flush Mount 18
Installing the Transducer Cable 19
Installing the Transducer Cable – Sidelooker Option 21
Installing the Transducer Cable –
Separate Speed and Temperature Sensors 21
Making the DC Power Connections 22
Calibrating the Sensors 24
3Operating Instructions 26
Controls on Display Panel 26
Turning the Power On and Off 28
Setup Memory 28
iv
Lamp/Contrast Menu 29
Operating Pages 30
FishFinder Page 32
Choosing a Frequency 37
Fish Indications 38
Bottom Indications 39
Window Page 41
Sidelooker Page 43
Digital Page 47
Performance Modes 50
Zoom Mode 50
A-Scope (Bottom Coverage) Mode 52
Bottom Lock Mode 54
4Setup Instructions 56
The Setup Menu 56
Range Setting 57
Sensitivity Setting 58
Chart Speed Setting 60
Frequency Setting 61
Resetting the Log 63
System Setup Menu 64
Simulator 65
Language 65
Fish Symbols 65
White Line 65
VRM 66
Sidelooker 66
Speed Cal 66
Temp Cal 67
Depth Digits 67
Shallow Alarm 67
Setup Menus for Zoom Mode 71
Zoom Select Menu 71
Zoom Screen Split/Full Menu Item 72
Setup Menus for Bottom Lock Mode 73
Bottom Lock Range Menu Item 73
Bottom Lock Split/Full Menu Item 74
Setup Menu for Window Page 75
Resetting from the Digital Page 76
Deep Alarm 68
Fish Alarm 68
Buzzer 69
Depth Units 70
Speed Units 70
Temp Units 70
Speed 70
Log 70
Temp 70
v
Setup Instructions for Sidelooker 76
Sidelooker Range Menu Item 77
Sidelooker Sensitivity Menu Item 78
Sidelooker Chart Speed Menu Item 78
Sidelooker View Menu item 79
Combining Displays 80
Resetting the Unit to Factory Defaults 81
Default Settings 82
5 Maintenance and Troubleshooting 83
Cleaning Instructions 83
Troubleshooting Suggestions 83
Servicing a Thru-Hull Transducer 87
How to Contact Raymarine 87
6Specifications 91
General Information 91
FishFinder Functions 92
Connector Diagrams 93
Glossary of Terms 94
vi
List of Figures
FigurePage
Unit in UseInside front cover
Front Paneli
1-1Typical Installation1
2-1T ransducer Types5
2-2Assembling the Transducer Bracket6
2-3Transducer Mounted on Transom7
2-4Transducer Bracket, Side View7
2-5Correct Mounting Position8
2-6Mounting the Transducer8
2-7Installing the Sidelooker Transducer10
2-8Installing the Sidelooker Transducer
on a Trolling Motor13
2-9Suppression Ferrites15
2-10Installation on Bracket16
2-11Dimensions17
2-12Flush-Mount Installation18
2-13Disassembling from Br acket19
2-14Installing Cable on Transom20
2-15Cable for Sidelook er Transducer21
2-16Cable for Speed and Temperature Sensor22
2-17DC P ower Connections23
3-1Display P anel26
3-2Lamp/Contrast Menu29
3-3Operating Pages31
3-4FishFinder Page32
3-5Fish Indications38
3-6Bottom Conditions40
3-7Window Page41
3-8Options for Window Page42
3-9Sidelooker Feature43
3-10Sidelooker Page4 4
3-11Digital Pag e47
3-12Perf ormance Modes49
3-13Zoom Mode50
3-14A-Scope Mode52
3-15Bottom Lock Mode54
4-1Setup Menus56
4-2Range Menu Item57
4-3Sensitivity Menu Item58
4-4Changing the Chart Speed Setting60
4-5Chart Speed Menu Item61
vii
4-6F requency Menu Item61
4-7Log Reset Menu Item6 3
4-8Reaching the System Setup Menu64
4-9System Setup Menu6 4
4-10Zoom Select Menu Item71
4-11Zoom Screen Split/Full Menu Item72
4-12Bottom Lock Range Menu Item73
4-13Bottom Lock Split/Full Menu Item74
4-14Digital Setup Menu Item75
4-15Sidelooker Range Menu item77
4-16Sidelooker Sensitivity Menu Item78
4-17Sidelooker Chart Speed Menu Item78
4-18Sidelooker V iew Menu Item79
4-19Split FishFinder Page with A-Scope Mode80
4-20Window Page with Option G Selected
and Zoom Enabled81
5-1Sample Mailing Label 89
6-1Connector Diagrams93
viii
1 – Introduction
About the FishFinder L470
The FishFinder L470 is a system that uses sound waves (“sonar”) to
detect fish and show the bottom of a lake or sea. The system includes a
transducer and a display unit, connected by a cable. The transducer
sends high-frequency sound waves down into the water. These sounds
strike fish, the bottom, or other objects in the water, and return as echoes.
The FishFinder then interprets these echoes and presents a display.
The FishFinder L470 can handle many different jobs:
•detect the presence of fish below the boat
•trigger an alarm when fish are found
•measure the depth of the water
•set alarms for minimum and maximum depth
•show the shape of the bottom
•determine whether the seabed is hard or soft
•measure the speed of the boat and the distance traveled
•show the water temperature
We are sure you will find the FishFinder L470 to be one of the most useful
devices on your boat.
Optional Thru Hull
Transducer
Transducer mounted
Introduction
FishFinder L470
Display Unit
in quick release
transom bracket
Raymarine
PWR
SETUP
CLEAR
ZOOM
A-SCP
BOT
LOCK
L470
Fig. 1-1
Typical Installation
1
System Components
The FishFinder L470 consists of a compact display unit connected to
a transducer. The transducer is attached to the boat and extends into
the water.
Standard Equipment
When you unpack your FishFinder L470, you should find the following
standard equipment in the carton. If any items are missing, please notify
your Raymarine dealer immediately, or contact the Customer Ser vice
Department at Raymarine at 1-800-539-5539, ext. 2333. Please provide
the serial number of the FishFinder when reporting any missing items.
(with mounting hardware)G623996-1
DC power cableM99-146
Instruction manualG627172-3
Four #10 x 3/4” ss mounting screws—
Standard Transducers
Depending on which model of the L470 you have purchased, the box will
include one of the transducers listed below:
DescriptionPar t No.
Transom-mount transducer (with speed
and temperature sensors, including
mounting bracket and hardware)M78898
Bronze thru-hull transducer (with
speed and temperature sensors)M78923
Optional Accessories
Optional accessories and parts can be purchased directly from
Raymarine. For prices and ordering information, please call the Parts
Department at (800) 539-5539 ext. 2333.
2
Introduction
DescriptionPart No.
Sidelooker transom-mount transducerM78930
Sidelooker transducer for trolling motor
mounting. Companion with M78928
downlooker depth/temp transducer,
with 12 ft. (3.6 m) cable and hardwareM78929
•Connecting the cables for the transducer and power supply
•Calibrating the display unit
About the Transducer
Sever al different kinds of transducers can be used with this unit. The
mount style, used most often, and in-hull types are shown in Fig. 2-1.
Besides measuring depth, the transducers have two other sensors: a
paddle wheel which detects the speed of the boat, and a sensor for the
water temperature. An optional transducer, the Sidelooker, detects
objects by looking out to the sides of the boat.
Since the transducer is very important to the operation of the FishFinder,
it is vital that the transducer be mounted correctly. The transducer will
give the most reliable readings if it looks into water which is smooth and
undisturbed. If you place the transducer so bubbles or turbulence flow
across the face of the unit, the system may give inaccurate readings.
There are three important rules when mounting any type of transducer:
•The transducer should be continuously covered by water when the
boat is moving. (If the transducer is mounted near the side of the
boat, it may be exposed when the boat is turning.)
•The transducer should be placed where turbulence or bubbles will not
pass directly over the face of the unit. Don’t place the transducer
behind any running strakes, intakes, or thru-hull fittings which create
turbulence.
•The transducer should be mounted where it will not be affected by the
wash from the propeller(s).
transom-
4
Installation
M78898
Transom-mount
transducer
M78923
Thru-hull
transducer
M99-142
Fairing for
thru-hull transducer
M78946
In-hull
transducer
M78930
Sidelooker
transducer for
transom mount
M78929
Sidelooker
transducer for
trolling motor
Fig. 2-1
Transducer
Types
Selecting the Correct Type of Transducer
Before you begin the installation, double-check to be sure you have the
correct type of transducer. Each kind of transducer is designed for a
particular type of use. In this manual we will include detailed mounting
instructions for the transom-mount transducer. We will also include some
general information on the other types. For detailed information on these
other transducers, see the instructions which are packaged with the unit.
Use a transom-mount transducer if –
. . . your boat has an outboard or inboard-outboard engine(s), and if you’re
planning to use the Sidelooker option. This type of transducer must be
mounted ahead of or beside the propeller(s). Do not use this type of
transducer for a boat with a straight-shaft inboard engine.
Use a thru-hull transducer if –
. . . your boat has a straight-shaft inboard engine. This type of transducer
is installed in a hole drilled through the hull.
Use an in-hull transducer if –
. . . you have a high-speed boat or if, for some reason, you cannot use a
transom-mount or thru-hull transducer. The hull may be no more than 1" thick.
Installation
5
Use a trolling motor transducer if –
. . . you want to attach the transducer to a trolling motor. (Not recommended for deep water operations.)
Use a Sidelooker transducer –
. . . for searching for fish or structure on either side of the boat. This type
of transducer is attached to the bracket of the transom-mount transducer,
or to the shaft of the trolling motor.
Assembling the Transducer Bracket
Fit together the two parts of the transducer bracket as shown in Fig. 2-2.
When the installation is complete, the parts snap together as shown.
Attach the
two parts
Lower the transducer
and snap in the
release clip
Bracket is installed
upside down
Fig. 2-2
Assembling
the T ransducer
Bracket
Positioning the Transom-Mount Transducer
Begin by finding the best location for the mounting brac k et. Here are the rules:
•If your boat has one propeller (outboard or inboard-outboard), mount
the transducer about 18" (455 mm) to the side of the centerline of the
boat. See Fig. 2-3. Choose the side that is on the downstroke of the
propeller. (This is usually the starboard side of the boat.) This will
reduce interference caused by air bubbles.
•If the propeller can be turned to steer the boat, allow at least 2"(50mm)
beyond the swing radius of the propeller. This will prevent the propeller
from damaging the transducer when it is turned. After installation, check
the clearance by turning the wheel so the propeller swings toward the
transducer. There should always be a 2" (50 mm) clearance.
NOT THIS!LIKE THIS!
6
Installation
Fig. 2-3
Transducer
Mounted on
Transom
Allow a clearance
of at least 10
inches (254 mm)
10"
(254 mm)
Transducer in
released position
Fig. 2-4
Transducer
Bracket,
Side View
•If your boat has twin propellers (outboard or inboard-outboard), place
the transducer near the centerline of the boat.
•
Do not
mount the transducer behind any hull fittings, intakes, or
other parts which extend from the hull. These may cause turbulence
or air bubbles.
•The bracket has a quick-release mechanism. This may reduce damage by allowing the transducer to flip up if it hits any debris or the
bottom. See Fig. 2-4. Allow enough clearance above the transducer so
that it can swing upward completely. This is about 10" (254 mm)
Installation
7
Average transom angle–
no wedge necessary
Vertical transom –
place wedge this way
Sloping transom–
place wedge this way
2 to 5
2 to 5 2 to 5
For fiberglass hull – 1/8" to 1/4" (3.2 to 6 mm)
For aluminum hull – 1/4" to 3/8" (6 to 9 mm)
No!No!No!
The bow of the transducer
is above the bottom of the
transom, creating
cavitation.
Insert screws 1 and 3
1/4" from the bottom of
slots, and screw 2
1/4" from the top of the
slot to allow room for
adjustment.
Rivets on the hull are
creating bubbles.
Lower the transducer
a bit.
123
Correct
alignment
The rear of the transducer
is too high, creating
cavitation.
Fig. 2-5
Correct Mounting
Position
If screws are inserted
this way, it won’t be
possible to make the
height adjustment.
8
Incorrect
alignment
Fig. 2-6
Mounting
the T ransducer
Installation
measured from the bottom of the transom.
•If considering the Sidelooker option, look for a mounting location
where the Sidelooker array will not be blocked by the engine housing
or other mounted hardware.
•If the boat will be carried on a trailer, be sure the transducer will not
hit any rollers, bunks or fittings on the trailer.
Mounting the Transom-Mount Transducer
1.On a boat with a fiberglass hull, the leading edge of the transducer
should extend 1/8" (3.2 mm) to 1/4" (6 mm) below the bottom edge of
the hull. See Fig. 2-5. On an aluminum hull, the transducer should
extend a bit more – 1/4" (6 mm) to 3/8" (9 mm). If the boat will be
operated at high speeds, the transducer may be mounted closer to
the centerline of the hull.
2.The lower surface of the transducer should tilt down toward the rear
at a slight angle (2° to 5°). The mounting bracket includes a wedge.
Depending on the angle of the transom on your boat, you may need
this wedge to get the correct angle for the bottom of the transducer.
3.Looking at the rear of the boat, be sure the bracket is vertical
(perpendicular to the water line).
4.Hold the bracket (and the wedge, if used) against the transom and
trace the positions of the screw slots.
5.Remove the bracket. See Fig. 2-6. The screws in the outer slots
should be placed about 1/4" (6 mm) up from the bottom of each slot.
The screw in the center slot should be placed 1/4” (6 mm) down from
the top. (This will allow you to adjust the bracket up or down a bit.)
Drill pilot holes 3/4" (19.1 mm) deep. Use a 9/64" (3.6 mm) drill bit.
To prevent drilling too deeply, wrap masking tape around the drill bit
about 7/8" (22 mm) from the tip. Drill in only as far as the tape
marker.
If you are attaching the bracket to a fiberglass hull, you can minimize
any surface cracking of the gel coat. Before drilling each pilot hole,
drill a shallow hole (chamfer) at each location about 1/16" (1.5 mm)
deep. Use a 1/4" (6 mm) drill bit.
6.Attach the bracket to the hull using the panhead screws with flat
washers. Before you tighten the screws, apply a good-quality marine
sealant to the pilot holes. This will protect the hull from water penetration.
Do not tighten the screws completely yet.
Installation
9
7.Move the bracket up or down so that the leading edge of the transducer has the clearance shown in Fig. 2-5.
8.Once the bracket is in the correct position, you can tighten the screws.
Mounting the Optional Sidelooker Transducer Transom-Mount Installation
1.The Sidelooker transducer allows the display unit to check the water
to either side of the boat. This is helpful when you are looking for fish
or structure near banks, or under docks or piers.
2.The M78930 Sidelooker transducer is attached to the same mounting
bracket used with the transom-mount transducer. See Fig. 2-7. Begin
by installing the transom-mount bracket as described earlier.
Fig. 2-7
Installing the
Sidelooker
Transducer
3.Remove the two screws and the bracket covering the paddle wheels.
4.Attach the Sidelooker transducer to the top of the transom mounting
bracket. Use the four panhead screws supplied. The fit should be
snug, but do not overtighten the screws.
5.Run the Sidelooker cable beside the depth cable for the transommount transducer.
10
Installation
Installation Notes – Thru-Hull Transducer
Detailed instructions for this installation will be included with the transducer. In this section, we will note just a few important points.
1.Earlier we listed three general rules for placing transducers. All of
these rules apply when you are mounting a thru-hull transducer.
Here are some other rules for selecting the best mounting location:
For planing hulls – Install in the flat planing area near the stern.
Always install forward of the propeller(s) and shaft(s).
For small displacement hulls – Install near the centerline of the hull
and 1/3 of the way forward from the stern. Always install forward of
the propeller(s) and shaft(s).
For large displacement hulls – Install near the centerline of the hull
and 1/3 of the way aft from the bow. Always install forward of the
propeller(s) and shaft(s).
For sailboats – Install forward of the leading edge of the keel, to one
side and near the centerline of the hull.
2.Choose a location where you can easily reach the transducer from
inside the boat. This will allow you to service the unit. Allow at least
6" (152 mm) of headroom above the transducer.
3.When choosing a mounting location,
mm) from the inside of the hull. Before you drill the hole, be sure you
will be able to reach the large nut on the top of the unit, and that there
will be enough clearance for the cable. If there is a strake or other
feature on the hull, drill from the outside of the hull instead. (This
small hole can be filled easily if the mounting location is not suitable.)
4.The position of the transducer is especially critical on high speed
boats (capable of more than 20 knots). Check the locations of the
transducers on similar boats before installing the transducer in your
own boat. Choose the location which will offer the best performance.
5.If the bottom of the hull at the mounting location is flat, you can mount
the transducer directly through the hull. If the hull rises at an angle
(the “deadrise angle”) of more than 10°, you must include a mounting
block or “fairing.” The transducer must be mounted in a vertical
position. Attach the fairing block to the hull as firmly as possible. This
fairing block must be able to resist the drag of the water against the
hull, and must also be completely waterproof.
drillasmallpilothole(1/8"or3.2
Installation
11
6.If the hull of the boat has a core-type hull, you will need to follow
some special mounting procedures. The core material must be
protected from any water which may leak from the inside of the boat.
(If the core material is allowed to remain wet, it may rot and weaken
the hull.)
7.When working with the transducer, support it by holding the body of
the unit or the rings. Do not hang the transducer from the cable.
8.It is very important to seal the opening around the transducer using a
high-quality marine sealant suitable for underwater use. After
installation, do not leave your boat in the water for any amount of time
without checking for leaks.
Installation Notes – In-Hull Transducer
Detailed instructions for this installation will be included with the transducer. In this section, we will note just a few important points.
1.Choose the best mounting location:
For outboard powerboats – Install as far aft as possible
For inboard/outboard powerboats – Install close to the engine(s)
For inboard powerboats – Install forward of the propeller(s) and
shaft(s)
For sailboats – Install near the centerline of the hull and forward of
the leading edge of the keel
2.An in-hull transducer may only be installed in a fiberglass hull which
is no more than 1" (25 mm) thick. The in-hull transducer may not be
installed in wood or aluminum hulls.
3.Use the standard in-hull transducer if it will be installed in a flat part
of the hull, or a section with no more than 10° of deadrise. Use the
angled in-hull transducer if the mounting location has up to a 22° of
deadrise.
4.Do not try to compensate for the angle of the hull by fairing the epoxy
adhesive on the face of the transducer.
5.Use the epoxy supplied with the in-hull transducer, or an equivalent
epoxy glue. Do not use any other type of adhesive, including silicone
or RTV adhesive.
12
Installation
Installation Notes – Trolling Motor Transducers
Both Downlooker and Sidelooker transducers may be installed on a
trolling motor. See Fig. 2-8.
Fig. 2-8
Installing the
Sidelooker
Transducer on a
Trolling Motor
Detailed instructions for these installations will be included with the
transducer(s). The Downlooker transducer is mounted on the horizontal
gear case of the motor. The Sidelooker transducer is attached to the
vertical support tube. These installations are simple, but it is important to
keep these points in mind:
1.Keep the Sidelooker transducer fully submerged. The transducer will
only produce an image if it is immersed in water.
2.Keep the Sidelooker transducer clear of weeds or debris.
3.When the position of the trolling motor is changed, the field of view of
the Sidelooker also changes. The Sidelooker can be aimed at
interesting echoes, but can also be positioned so that it is looking
back at the hull. Be aware of the position of the Sidelooker transducer.
Installation
13
Installation Notes – Transducer for Speed and
T emperature Only
This type of transducer may be used with a thru-hull transducer which
reads depth only. The speed/temperature transducer is attached to the
transom of the boat. Detailed instructions for this installation will be
included with the transducer. The cable for this transducer uses a “Y”
connector. See the notes on “Installing the Transducer Cable.”
EMC Installation Guidelines
When different types of marine electronic equipment are mounted closely
together in a tight space, they may interfere with each other. The design
and manufacture of this unit follow industry standards for “Electromagnetic
Compatibility” (EMC). However, it is important to install the unit correctly to
ensure the best possible performance. Below is a list of some of the
factors which could affect the operation of the product. Some of these
factors may affect the way you install the FishFinder and the wiring
cables.
•Place the display unit and the power and signal cables at least 3 ft.
(1m) from any equipment transmitting radio signals, or any cables
carrying radio signals. This includes VHF radios, cables and antennas. In the case of SSB radios, the distance should be increased to 7
ft. (2m).
•Allow a space of at least 7 ft. (2m) from the path of a radar beam.
Normally, a radar beam will spread about 20° above and below the
radiating element.
•The power for the display unit should be supplied from a different
battery than the one used to start the engine. If the voltage to the
FishFinder unit drops below +10.8 V DC, this could cause the unit to
reset. This will not damage the equipment, but it may cause the loss
of some information, and it can change the operating mode.
Avoid running the FishFinder power wires near the power wiring for any
radar, radio, or Loran-C units. If possible, wire the FishFinder power wires
to a separate circuit breaker.
•If the transducer cable runs near another electrical wire, it may pick
up electrical interference or “noise.” To reduce this, try to keep the
14
Installation
transducer cable separated as far as possible from all other wires.
This is especially important with wiring for the boat’s ignition, alternator, or tachometer. It is also helpful to keep the transducer cable away
from the FishFinder power cable. If it is necessary to run the transducer cable across any wires, make the crossing at a right angle.
•Use only genuine Raymarine cables. During the installation, do not
cut the transducer cable or remove the connector. Do not try to
shorten or splice the cable. The transducer cable includes several
wires, along with shielding and insulation. If the cable is cut, it cannot
be repaired. (Cutting the cable will also void the warranty.) During
installation, if you need to drill any holes for the cable, they must be
large enough to accept the connector. This will allow you to make the
installation without cutting the wire.
•A “suppression ferrite” may be attached to one of the cables. See Fig.
2-9. If you must remove the ferrite during installation, be sure to
reassemble it in the same position.
Fig. 2-9
Suppression
Ferrites
Installation
15
To release the
display from
the base,
press on the
right and left
sides until you
hear the clicks.
Slide the
display out
of the bracket.
The display can
be turned from
side to side.
Raymarine
PWR
SETUP
CLEAR
ZOOM
A-SCP
BOT
LOCK
F
IS
H
F
IN
D
E
R
L470
The angle of
the display
can be changed.
Fig. 2-10
Installation
on Bracket
Mounting the Display Unit – Standard Mount
You may mount the display unit on any flat surface using the bracket
supplied. See Fig. 2-10. (There is also an optional kit which allows you to
flush-mount the display in a flat panel or dashboard). Follow these
instructions if you are using the standard mounting bracket:
1.The “LCD” type display used on this unit is easier to see from certain
angles. Before selecting a permanent mounting location, make
temporary power connections and turn on the unit. This will allow you
to test the visibility of the display from several different angles.
2.Remove the display unit from the bracket by pressing on the large
button in the center of the bracket. See Fig. 2-10.
3.Mount the base of the bracket using the supplied screws.
4.Slide the display unit back into the bracket.
5.Adjust the display unit for the best viewing angle. You can tur n the
display from side to side, and tilt it up or down.
Dismounting the Display Unit
See Fig. 2-10. To release the display from the bracket, press and hold
down the left and right sides. You will hear an audible “click,” and the
bracket will slide out.
16
Installation
1-3/4"
(44 mm)
2-27/32"
(72 mm)
4-9/32"
(109 mm)
Hole 3/16" (5 mm)
1-3/4"
(45 mm)
1-15/32"
(37 mm)
2-25/32"
(70 mm)
2-21/32"
(67 mm)
6-5/8" (169 mm)
8-1/4"
(210 mm)
5-13/16"
(147 mm)
Installation
3-29/32"(99 mm)
4-7/32"(107 mm)
Fig. 2-11
Dimensions
17
Mounting the Display Unit – Flush Mount
In order to do this installation, you will need the optional flush mounting kit
(part no. M99-138). See Fig. 2-12.
1.Select a mounting location on the dashboard or control panel.
Choose a clear, flat area at least 7" x 7" (180 mm x 180 mm). Be
sure you will also have at least 6" (152 mm) of clearance behind the
area where the display unit will be mounted. It is a good idea to drill
a small pilot hole in the center of the mounting area. Be sure there
are no hidden electrical wires or other items behind the point where
you plan to mount the display unit.
2.A mounting template is supplied with the flush mounting kit. Tape this
over the selected location on the panel and trace around the edges.
3.Make the cutout for the display. Drill a series of 1/2" (13 mm) holes at
the points shown around the edges of the cutout area.
4.Drill the two small holes for the threaded studs as shown on the
mounting template. Use a 7/32" (5.5 mm) drill bit.
5.Remove the template and draw straight lines between the 1/2" holes.
Cut along each of the lines with a small saw.
18
Fig. 2-12
Flush-mount
Installation
Installation
6.Separate the display unit from the mounting bracket. (See Fig. 2-13.)
Press the large button in the center of the bracket to separate the
bracket arms. The display unit is attached to the arms by two screws.
Each screw is covered by a cap. Locate the small slot beside each
cap and pry upward using a small screwdriver. Remove the caps,
then the two screws and the two wave washers. Save these parts in
case you ever want to use the mounting bracket.
Raymarine
LOCK
FISHFINDER
L470
PWR
SETUP
CLEAR
ZOOM
A-SCP
BOT
To pry up the cap,
insert a small screwdriver here.
Fig. 2-13
Disassembling
from Bracket
7.Screw the threaded studs into the holes on the rear of the display unit.
8.Set the display unit into place to be sure that it will fit correctly.
Thread the wing-nuts onto the threaded studs to hold the display
unit in place temporarily.
9.Once the DC wiring is complete, finish the installation. Hold the
gasket in place around the opening. Fit the display into the cutout
again. From the rear, screw the thumbscrews securely onto the
threaded studs to hold the unit in place.
Installing the Transducer Cable
A 20 foot length of cable, with the connector attached, is supplied with the
Downlooker transducer.
Route the cable up and over the top edge of the transom. See Fig. 2-14.
Fig. 2-14
Installing Cable
on T ransom
Secure the cable using cable clamps. (These clamps are available
from your local marine equipment supplier.)
If you do not want to expose the cable on the deck, you may drill a
new hole (3/4" or 19 mm) through the transom for the cable. (Remember–this hole must be large enough to accept the cable with the
connector attached. Do not cut the cable!) To seal the opening, use
a feed-thru cap where the cable passes through the transom.
2.Run the cable through the interior of the boat. If the transducer cable
runs near another electrical wire, it may pick up electrical interference
or “noise.” To reduce this, try to keep the transducer cable separated
as far as possible from all other wires. This is especially important
with wiring for the boat’s ignition, alternator, or tachometer. Also try to
keep the transducer cable away from the antenna and power cables
for VHF or FM radios. It is also helpful to keep the transducer cable
away from the FishFinder power cable. If it is necessary to run the
transducer cable across any wires, make the crossing at a right
angle.
3.Be careful not to tear the cable jacket when passing it through bulkheads and other parts of your boat. Secure the cables in place using
tywraps or lacing twine. Coil the extra cable and tie it out of the way.
4.If the 20 foot transducer cable is not long enough, a 15 foot extension
cable
When you attach the extension cable, be sure that the connections
are tight and watertight. Use Dow Corning DC-4 or an equivalent
sealing compound to protect the connector assemblies.
5.At the rear of the display unit, plug in the transducer cable using the
keyed connector.
Installing the Transducer Cable – Sidelook er Option
1.If the installation includes the optional Sidelooker transducer, there
will be two transducer cables. See Fig. 2-15. The cable from the
Sidelooker includes a “Y” connector, and is 12’ long (3.6 m).
2.Plug the cable from the depth transducer into the open end of the “Y”
connector.
Sidelooker
transducer
Depth
transducer
Fig. 2-15
Cable for
Sidelooker
Transducer
Installing the Transducer Cable –
Installation with Separate Speed and Temperature Sensors
1.Optionaldepth-onlyandspeed- and temperature-onlytransducersare
available for the FishFinder L470. In this optional configuration the
separate transducers are connected via a “Y” type receptacle cable
located on the optional speed- and temperature-only transducer cable.
Installation
21
2.Plug the cable from the depth-only transducer into the receptacle
connector on the optional speed- and temperature-only transducer.
The speed- and temperature-only transducer then connects at the
transducer receptacle of the FishFinder L470. This is shown below in
Fig. 2-16.
Sensor for
speed and
temperature
Sensor for
depth only
Fig. 2-16
Cable for Speed
and T emperature
Sensor
Making the DC Power Connections
1.The display unit is designed for use on boats with 12V DC power
systems. (The unit can operate as long as the DC voltage is between
10.8 and 16V DC.) The display unit can be wired to a negativeground system, or both the negative and positive supply lines may be
“floating” above ground.
with positive ground.
2.The 6-foot power cable supplied with the display unit should reach
the source of DC power. On a small boat, connect the power leads
directly to the main battery isolation switch or breaker. On a larger
boat, route the power leads to the DC power distribution panel.
3.It is very important that you connect the power leads correctly. See
Fig. 2-17. At the power source, connect the
22
This unit is not intended for use on boats
red
wire to the
positive
Installation
RED
DC 12V
BLACK
RF ground
DC 12V
connector
to battery
T/D
connector
to transducer
Fig. 2-17
DC Pow er
Connections
terminal (+), and the
black
wire to the
negative
terminal (-). The
negative terminal may also be called “ground” or “earth.” (The display
unit is internally protected if you accidentally reverse the polarity of
the power wires.)
4.Attach the red or positive wire to a 5 amp circuit breaker. If the unit is
connected directly to the boat’s battery, include a 2 amp in-line fuse.
(In-line fuses are available at most marine supply stores.)
5.The power cable includes a smaller “shield” wire. Connect this to a
good ground.
6.If you need to extend the power wiring by more than 10 feet, use a
larger wire size. This will allow the wires to deliver the correct voltage
in spite of the longer wire distance. For runs of 20 to 35 feet, use #14
AWG.
If you extend the power wiring, be sure all electrical connections are
solid and durable. Soldering is the best way to make these connections. Insulate all connections using heat-shrink tubing or electrical
tape. You may also use crimp connectors or a terminal strip, but be
sure to use good-quality marine-grade parts.
7.At the rear of the display unit, plug in the power cable using the keyed
connector.
Installation
23
Note –
Press firmly when inserting the power cable and transducer cable to
ensure a tight seal.
8.When you press the
unitwillnot turn on and you suspect that you may have reversed the
the
power connections, check the DC power lines all the way back to the
battery. If t he p o la rity is not correct, reconnect the leads properly and
try again.
PWR
button, the display unit should turn on. If
Calibrating the Sensors
The transducer most often used with this unit includes sensors for boat
speed and water temperature. These sensors are normally very accurate,
but you may want to calibrate them. The procedure appears on page 64.
See the section on “System Setup Menu.”
The speed indication on your FishFinder is usually very accurate. However, there are some special cases where the speed reading may be high
or low. This means that the speed of the water past the transducer may
not
bethe same speed that your boat moves through the water. The hull of
the boat may have a shape which channels water past the transducer at a
speed which is faster or slower than normal.
1.To calibrate the speed sensor, set up a course between two known
points. As markers you can use buoys, range markers, or landmarks.
Measure the length of time the boat takes to cover a known distance.
2.You may also use locations indicated by a G.P.S. or Loran unit. (If you
choose this method, remember that these devices measure “speed
over ground” or “speed over the bottom.” Tides, currents, or winds
can create a difference between the FishFinder’s “speed through
water” measurement and the boat’s “speed over ground.” Before
calibrating using a G.P.S. or Loran unit, wait for still water or slack tide
conditions.
3.If the display unit is reading high or low, you can correct for this using
the entry for “Speed Cal.” (To reach Speed Cal, go to the System
Setup Menu. This is described in Section 4.) The entry for Speed Cal
is a percentage. An entry of “100” equals 100%, meaning that there
is no correction. If the display unit is producing a
low
reading, use a
24
Installation
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