No part of this manual may be copied, reproduced, republished,
transmitted or distributed for any purpose, without prior written
consent of Eagle Electronics.
ny unauthorized commercial
distribution of this manual is strictly prohibited.
Eagle® and Cuda
®
300 are registered trademarks of Navico.
Eagle Electronics may find it necessary to change or end our policies,
regulations, and special offers at any time. We reserve the right to do so
without notice. All features and specifications subject to change without
notice. All screens in this manual are simulated.
For free owner's manuals and the most current information on
this product, its operation and accessories,
visit our web site:
www.eaglesonar.com
Eagle Electronics
P.O. Box 669
Catoosa, OK USA 74015
Printed in USA.
Table of Contents
Specifications: Cuda™300 & Cuda™ 300 Portable ......................... iii
Input power: ...................10 to 17 volts DC.
Current drain:................170 ma lights off; 240 ma lights on.
Back-up memory:...........Built-in memory stores sonar settings when
unit is turned off.
Sonar
Frequency: ......................200 kHz.
Transducers:...................A Skimmer
your unit. Its 20° cone angle offers a wide
fish detection area of up to 60º with high sensitivity settings. Operates at boat speeds up
to 70 mph (61 kts).
Transmitter:....................800 watts peak-to-peak power (typical); 100
watts RMS power (typical).
Sonar sounding
depth capability:............600 feet (180 meters). Actual capability de-
pends on transducer configuration and installation, bottom composition and water conditions. All sonar units typically read deeper in
fresh water than in salt water.
Depth display: ................Continuous digital readout.
®
transducer comes packed with
iii
Audible alarms:..............Deep/shallow/fish.
Automatic ranging: ....... Yes, with instant screen updates.
Auto bottom track: ........ Yes.
Zoom bottom track:....... Yes.
Split-screen zoom: ......... No.
Surface water temp: .....Yes, built into transducer. Optional external
temperature sensor or combo speed/temp
sensor available.
NOTICE!
The storage temperature for your unit is from -4 degrees to +167
degrees Fahrenheit (-20 degrees to +75 degrees Celsius). Extended
storage in temperatures higher or lower than specified will damage
the liquid crystal display in your unit. This type of damage is not
covered by the warranty. For more information, contact the factory's Customer Service Department; phone numbers are inside the
manual's back cover.
iv
Transducer Installation
Preparations
You can install the sonar in some other order if you prefer, but we recommend this installation sequence:
Caution:
You should read over this entire installation section before drilling any holes in your vehicle or vessel!
1. Determine the approximate location for the sonar/GPS unit, so you
can plan how and where to route the cables for the transducer and
power. This will help you make sure you have enough cable length for
the desired configuration.
2. Determine the approximate location for the transducer and its cable
route.
3. Determine the location of your battery or other power connection,
along with the power cable route.
4. Install the transducer and route the transducer cable to the sonar/GPS unit.
6. Install the power cable and route it to the sonar/GPS unit.
7. Mount the sonar/GPS unit to the bracket.
Transducer Installation
®
These instructions will help you install your Skimmer
transom, on a trolling motor or inside a hull. These instructions cover
both single- and dual-frequency Skimmer transducers. Please read all
instructions before proceeding with any installation.
The smaller single-frequency Skimmers typically use a one-piece,
stainless steel mounting bracket. The larger dual-frequency Skimmers
typically use a two-piece, plastic mounting bracket. The trolling motor
mount uses a one-piece plastic bracket with an adjustable strap.
transducer on a
1
These are all "kick-up" mounting brackets. They help prevent damage if the
transducer strikes an object while the boat is moving. If the transducer does
"kick-up," the bracket can easily be pushed back into place without tools.
Read these instructions carefully before attempting the installation.
Determine which of the mounting positions is right for your boat. Re-
member, the transducer installation is the most critical part of
a sonar installation.
NOTE:
The following installation types also call for these recommended
tools and required supplies that you must provide (supplies listed
here are not included):
Single-frequency transom installations
Tools include: two adjustable wrenches, drill, #29 (0.136") drill bit,
Phillips head screwdriver. Supplies: high quality, marine grade aboveor below-waterline sealant/adhesive compound.
Dual-frequency transom installations
Tools: two adjustable wrenches, drill, #20 (0.161") drill bit, Phillips head screwdriver. Supplies: four, 1" long, #12 stainless steel slotted wood screws, high quality, marine grade above- or below-waterline sealant/adhesive compound.
Single-frequency trolling motor installations
Tools: two adjustable wrenches, Phillips head screwdriver. Supplies:
plastic cable ties.
Selecting a Transducer Location
1. The location must be in the water at all times, at all operating speeds.
2. The transducer must be placed in a location that has a smooth flow
of water at all times. If the transducer is not placed in a smooth flow of
water, interference caused by bubbles and turbulence will show on the
sonar's display in the form of random lines or dots whenever the boat is
moving.
2
NOTE:
p
Some aluminum boats with strakes or ribs on the outside of the
hull create large amounts of turbulence at high speed. These boats
typically have large outboard motors capable of propelling the boat
at speeds faster than 35 mph. Typically, a good transom location on
aluminum boats is between the ribs closest to the engine.
3. The transducer should be installed with its face pointing straight
down, if possible.
4. If the transducer is mounted on the transom, make sure it doesn't
interfere with the trailer or hauling of the boat. Also, don't mount it
closer than approximately one foot from the engine's lower unit. This
will prevent cavitation (bubble) interference with propeller operation.
5. If possible, route the transducer cable away from other wiring on the
boat. Electrical noise from engine wiring, bilge pumps and aerators can
be displayed on the sonar's screen. Use caution when routing the transducer cable around these wires.
CAUTION: Clamp the transducer cable to transom near
the transducer. This will help
revent the transducer from
entering the boat if it is
knocked off at high speed.
Good location
Good
location
Poor angle
Good and poor transducer locations.
Poor location
Good location
3
How low should you go?
For most situations, you should install your Skimmer transducer so
that its centerline is level with the bottom of the boat hull.
This will usually give you the best combination of smooth water flow
and protection from bangs and bumps.
Transducer
centerline
Align transducer centerline with hull bottom.
Transom
Hull bottom
However, there are times when you may need to adjust the transducer
slightly higher or lower. (The slots in the mounting brackets allow you
to loosen the screws and slide the transducer up or down.) If you frequently lose bottom signal lock while running at high speed, the transducer may be coming out of the water as you cross waves or wakes.
Move the transducer a little lower to help prevent this.
If you cruise or fish around lots of structure and cover, your transducer
may be frequently kicking up from object strikes. If you wish, you may
move the transducer a little higher for more protection.
There are two extremes you should avoid. Never let the edge of the
mounting bracket extend below the bottom of the hull. Never let the
bottom – the face – of the transducer rise above the bottom of the hull.
Transom Transducer Assembly And Mounting
The best way to install these transducers is to loosely assemble all of the
parts first, place the transducer's bracket against the transom and see if
you can move the transducer so that it's parallel with the ground.
4
The following instructions sometimes vary depending on the mounting
bracket that came with your transducer. Single-frequency Skimmers come
with a one-piece stainless steel bracket, while dual-frequency Skimmers
come with a two-piece plastic mounting bracket. Use the set of instructions that fits your model.
1. Assembling the bracket.
A. One-piece bracket: Press the two small plastic ratchets into the
sides of the metal bracket as shown in the following illustration. Notice
there are letters molded into each ratchet. Place each ratchet into the
bracket with the letter "A" aligned with the dot stamped into the metal
bracket. This position sets the transducer's coarse angle adjustment for a
14° transom. Most outboard and stern-drive transoms have a 14° angle.
Dot
Align plastic ratchets in bracket.
B. Two-piece bracket: Locate the four plastic ratchets in the trans-
ducer's hardware package. Press two ratchets into the sides of the plastic bracket and two on either side of the transducer as shown in the following illustrations. Notice there are letters molded into each ratchet.
Place the ratchets into the bracket with the letter "A" aligned with the
alignment mark molded into the bracket. Place the ratchets onto the
transducer with the letter "A" aligned with the 12 o'clock position on
the transducer stem. These positions set the transducer's coarse angle
adjustment for a 14° transom. Most outboard and stern-drive transoms
have a 14° angle.
5
Alig
Alignment
r
positions
Transduce
nment letters
Transducer bracket
Transducer
bracket
Insert and align ratchets.
Transducer
Ratchet
Ratchet
Add ratchets to bracket and transducer.
2. Aligning the transducer on the transom.
To align the transducer to the transom, side the transducer between
the ratchets. Look at the transducer from the side and adjust it so that
its face is parallel to the ground. The alignment letters on either side of
the bracket need be the same.
6
If the transducer's face isn't parallel with the ground, remove the
transducer and ratchets from the bracket. Place the ratchets into the
holes in the bracket with the letter "B" aligned with the dot stamped in
the bracket.
Reassemble the transducer and bracket and place them against the
transom. Again, check to see if you can move the transducer so it's parallel with the ground. If you can, then go to step 3A.
3. Assembling the transducer.
A. One-piece bracket: Once you determine the correct position for
the ratchets, assemble the transducer as shown in the following figure. Don't tighten the lock nut at this time.
Position transducer mount on transom and mark mounting holes. Side
view shown, left, and seen from above at right.
7
Metal
r
r
Nut
Rubber
washers
washer
Metal washer
Bolt
Assemble transducer and bracket.
B. Two-piece bracket: Once you determine the correct position for
the ratchets, assemble the transducer as shown in the figure in step
2B. Don't tighten the lock nut at this time.
Bolt
Flat washer
Lock washe
Nut
Flat washe
Assemble transducer and bracket.
4. Drilling mounting holes.
Hold the transducer and bracket assembly against the transom. The
transducer should be roughly parallel to the ground. The transducer's centerline should be in line with the bottom of the hull. Don't
let the bracket extend below the hull!
8
Mark the center of each slot for the mounting screw pilot holes. You
will drill one hole in the center of each slot.
Drill the holes. For the one-piece bracket, use the #29 bit (for the #10
screws). For the two-piece bracket, use the #20 bit (for the #12 screws).
5. Attaching transducer to transom.
Both bracket types: Attach the transducer to the transom. Slide the
transducer up or down until it's aligned properly with the bottom of
the hull as shown in the preceding and following figures. Tighten the
bracket's mounting screws, sealing them with the sealant.
Adjust the transducer so that it's parallel to the ground even if you
have a Deep-"vee" hull. Tighten the nut until it touches the outer
washer, then add 1/4 turn. Don't over tighten the lock nut! If you do,
the transducer won't "kick-up" if it strikes an object in the water.
Bottom
of
hull
Flat-bottom hullDeep-"vee" hull
Align transducer centerline with hull bottom and attach transducer to
transom. Rear view of dual-frequency Skimmer shown.
6. Route the transducer cable through or over the transom to the sonar
unit. Make sure to leave some slack in the cable at the transducer.
9
If possible, route the transducer cable away from other wiring on the
boat. Use caution when routing the transducer cable around these
wires.
WARNING:
Clamp the transducer cable to the transom close to the
transducer. This can prevent the transducer from entering the boat if it is knocked off at high speed.
Caution:
If you need to drill a hole in the transom to pass the connector
through, the required hole size be 1". If you drill the hole, make
sure it is located above the waterline. After installation, be sure
to seal the hole with the same marine grade above- or belowwaterline sealant used for the mounting screws.
7. Make a test run to determine the results. If the bottom is lost at
high speed, or if noise appears on the display, try sliding the transducer bracket down. This puts the transducer deeper into the water,
hopefully below the turbulence causing the noise. Don't allow the
transducer bracket to go below the bottom of the hull!
Trolling Motor Bracket Installation
(single-frequency only)
1. Attach the optional TMB-S bracket to the transducer as shown in the
following figure, using the hardware supplied with the transducer.
(Note: The internal tooth washer is supplied with the TMB-S.)
2. Slide the adjustable strap supplied with the TMB-S through the slot
in the transducer bracket and wrap it around the trolling motor. Position the transducer to aim straight down when the motor is in the
water. Tighten the strap securely.
10
r
TMB-S bracket
Bolt
Internal tooth washer
Nut
Flat washe
Attach motor mounting bracket to transducer.
3. Route the transducer cable alongside the trolling motor shaft. Use
plastic ties (not included) to attach the transducer cable to the trolling motor shaft. Make sure there is enough slack in the cable for the
motor to turn freely. Route the cable to the sonar unit and the transducer is ready for use.
Transducer mounted on trolling motor, side view.
Transducer Orientation and Fish Arches
If you do not get good fish arches on your display, it could be because
the transducer is not parallel with the ground when the boat is at rest
in the water or at slow trolling speeds.
11
Partial fish arches
Transducer aimed
too far back
Full fish arch
Proper transducer angle
Transducer angles and their effects on fish arches.
Transducer aimed
too far forward
If the arch slopes up – but not back down – then the front of the transducer is too high and needs to be lowered. If only the back half of the
arch is printed, then the nose of the transducer is angled too far down
and needs to be raised.
NOTE:
Periodically wash the transducer's face with soap and water to remove
any oil film. Oil and dirt on the face will reduce the sensitivity or may
even prevent operation.
12
Power Connections (permanent mount only)
The unit works from a 12-volt battery system. You can attach the
power cable to your boat's accessory or power buss (or directly to the
battery). If you use an accessory buss but have problems with electrical
interference, attach the power cable directly to the battery. If the cable
is not long enough, splice #18 gauge wire onto it.
CAUTION:
When using
ommend that you shut off the power supply to the power cable
when the unit is not in use. When the unit is turned off but still
connected to a power supply, electrolysis can occur in the power cable plug. This may result in corrosion of the plug body along with
the electrical contacts in the cable and the unit's power socket.
In saltwater environments we recommend you connect the power
cable to the auxiliary power switch included in most boat designs.
If that results in electrical interference, or if such a switch is not
available, we recommend connecting direct to the battery and installing an inline switch. This will let you shut off power to the
power cable when the unit is not in use. When you are not using
the unit, you should always shut off power to the power cable, especially when the power cable is disconnected from the unit.
If possible, keep the power cable away from other boat wiring, especially the engine's wires. This will provide the best isolation from electrical noise. The power cable has two wires, red and black. Red is the
positive lead, black is negative or ground. Make sure to attach the inline fuse holder to the red lead as close to the power source as possible.
the unit in a saltwater environment, we strongly rec-
13
To unit
Black wire
12 volt
battery
Red wire with
3 amp fuse
Power connections for the Cuda 300 sonar unit
(direct battery connection shown).
For example, if you have to extend the power cable to the battery or
power buss, attach one end of the fuse holder directly to the battery or
power buss. This will protect both the unit and the power cable in the
event of a short. It uses a 3-amp fuse.
Caution:
Do not use this product without a 3-amp fuse wired into the
power cable! Failure to use a 3-amp fuse will void your warranty.
This unit has reverse polarity protection. No damage will occur if the
power wires are reversed. However, the unit will not work until the
wires are attached correctly.
Mounting the Sonar Unit: In-Dash, Bracket or Portable
You can install the sonar unit on the top of a dash with the supplied
bracket. This unit can be installed in a dash with the optional FM-6 indash adapter kit. The FM-6 kit includes an instruction sheet, part 9880147-631, which contains a template for cutting out the mounting hole.
This document can be downloaded free from the www.eaglesonar.com
web site.
14
Bracket Installation
Recommended tools for this job include: drill, 1" (25.4 mm) drill bit,
screwdriver. Required supplies for this job include: high quality, ma-rine grade above- or below-waterline caulking compound, three #10
stainless steel screws. Screw length and type should be suitable for the
material on which you intend to mount the bracket.
Mount the unit in any convenient location, provided there is clearance
when it’s tilted for the best viewing angle. You should also make sure
there is enough room behind the unit to attach the power/transducer
cable. (See the following drawings, which show the dimensions of a
gimbal-mounted Cuda 300 sonar unit.)
107.5
[4.23]
156
[6.26]
82.7
[3.26]
12.09 [0.48]
76.9
[3.03]
Front view (left) and side view (right) showing dimensions
of the Cuda 300 when mounted on quick release bracket.
Millimeter
[Inch]
70.3
[2.77]
15
Holes in the bracket’s base allow wood screw or through-bolt mounting.
You may need to place a piece of plywood on the back side of thin panels to reinforce the panel and secure the mounting hardware.
Drill a 1" (25.4 mm) hole in the dash for the power/transducer and accessory cables. The best location for this hole is immediately under the
gimbal bracket location. This way, the bracket can be installed so that
it covers the hole, holds the cables in position and results in a neat installation. Some customers, however, prefer to mount the bracket to the
side of the cable hole — it's a matter of personal preference.
After drilling the hole, pass the connectors up through the hole from
under the dash. If you wish, you can fill in the hole around the cable with
a good marine caulking compound. (Some marine dealers stock cable hole
covers to conceal the opening.)
Using the Quick Release Mounting Bracket
These units use a quick release mounting bracket. When you run the
cables through the bracket's cable slots, make sure you allow enough
slack for tilting the unit and attaching the connector. (The snug fit of
the push-on waterproof connector requires some force to attach.)
Ratchet
Screw hole
Power/transducer
cable
Cuda 300 quick release mounting bracket (left). Adjusting the viewing
angle of a display unit (right).
Rear
view
Cable slot
Depress
ratchets to
release
16
Attach the unit to the bracket by first connecting the power/transducer
and accessory cables. Then, hold the sonar unit vertically and slide it
onto the bracket from above. (The back of the unit should be touching
the front of the bracket as you lower it into position.) As you push
down, the unit will lock into place with a distinct click.
To adjust the viewing angle, pinch the ratchets with one hand, then tilt
the unit with your other hand. Release the ratchets and the unit locks
into the new position. To dismount the unit for storage, press the ratchets and lift the unit off the bracket.
Portable Sonar Installation
Like many Eagle products, the Cuda 300 sonar is capable of portable
operation. It uses the optional PPP-12 portable power pack.
The PPP-12 package includes the power pack, battery adapter and a portable transducer. The transducer can be stored inside the power pack. The
PPP-12 requires eight AA alkaline batteries. Batteries are not included.
To use a portable power pack, you install the batteries and then attach
the sonar unit to the power pack's bracket. Plug in the
power/transducer cable and you're ready to fish.
The PPP-12 has a quick-release mounting bracket built into the case.
Installing the Batteries
Open the case and lay it flat. (The latch is located below the handle.)
Insert eight "AA" size batteries into the battery adapter and place it in
the battery compartment. Slip the battery cover tabs into the slots in
the case wall, then close the battery cover with the thumb screw.
Plug the cable's power (dog bone-shaped) connector into the socket on
the battery compartment cover. Route the cable's unit connector and
about 6 inches (15.2 cm) of cable through the opening under the sonar
mount. Close the case bottom, using the slot in the case wall to avoid
pinching the cable. Turn the unit over to mount the sonar.
17
Route this
p
g
cable through
enin
o
Cable slot
in case wall
Install batteries in battery compartment (left).
Attach power cable, and route wires as shown (right).
CAUTION:
When using the sonar in a saltwater environment, we strongly
recommend that you unplug the power connector from the battery socket when the unit is not in use. When the unit is turned
off but still connected to a power supply, electrolysis can occur in
the power cable plug. This may result in corrosion of the plug
body along with the electrical contacts in the cable and the
unit's power socket.
Mounting the Unit
A quick-release mount is built into the top of the portable power pack. To
attach the unit, first plug in the cable connector. Then, hold the sonar unit
vertically and slide it onto the bracket from above. (The back of the unit
should be touching the front of the bracket as you lower it into position.)
As you push down, the unit will lock into place with a distinct click.
To adjust the viewing angle, pinch the quick-release mount's ratchets
with one hand, then tilt the unit with your other hand. Release the
ratchets and the unit locks into the new position. To remove the unit
from the PPP-12, press the ratchets and lift the unit off the bracket.
18
Ratchet
To mount the sonar, slide the unit onto the bracket from above (left).
To adjust the view, press and release spring-loaded ratchets while tilt-
ing the unit (right).
Portable Transducer Assembly
Make sure there is one washer on each side of the transducer, inside the
bracket. Slide the other washer over the end of the bolt and screw on the nut.
Screw the suction cup onto the bracket
using the supplied screw and flat
washer. Tie the nylon cord through the
hole in the top of the bracket. When
using the transducer, tie the other end
Hull
of the nylon cord to the boat. This will
help prevent losing the transducer if it
comes off. Clean the chosen area of
the hull before attaching the suction cup. Locate the transducer on
the hull as shown in the following
figure. Don't let the bracket extend
below the hull, because water pres-
Portable transducer installed on
boat transom.
sure against it can cause the suction
cup to come off at speed.
19
Tie
nylon
cord
here
Screw
Bolt
Washer
Suction
cup
Nut
Washer
Transducer
Portable transducer assembly: rear view (left) and side view (right).
NOTE:
For optimum operation, the portable transducer should be adjusted
so that it is parallel to the ground. For more information on this,
see the segment in the unit's operation manual on Transducer Ori-
entation and Fish Arches.
Moisten the suction cup, then press it onto the hull as firmly as possible. Tie the nylon cord to the boat and set the power pack and sonar unit in
a location for easy viewing. Your portable sonar is now ready for use.
20
Operation
Keyboard Basics
The Cuda 300 has five buttons including, Power/Clear, Menu Up, Menu
Down and two arrow keys.
1
3
Eagle Cuda 300 keyboard.
PWR/CLEAR
Press the
menu selections from the screen.
MENU UP & MENU DOWN
The MENU UP key cycles forward through the menus. The MENU DOWN
key moves backward through the menus. To scroll through the unit's
menus, repeatedly press a
UP & DOWN ARROWS (↑ ↓)
The
PWR key to turn the unit on and off. It also clears menus and
MENU key.
UP and DOWN ARROW keys are used to adjust features and functions.
2
Memory
This unit has an internal backup battery that saves the following user
settings when power is turned off: Units of Measure, Temp Size, Depth
21
Size, Fish I.D. mode, Noise Reject mode, Range mode, Zoom, Sensitivity,
p
r
Grayline, Chart Speed, Battery Alarm, Display Contrast, Backlight, Language, Fish Alarm, Battery Alarm and Shallow and Deep alarms.
Display
When the unit is turned, the backlight menu will appear. Use the
ARROW keys to turn the backlight on or off. Press PWR to clear the
menu from the screen.
Depth range will be displayed on the left side of the screen. In the following figure, the screen shows a depth range from 0 to 80 feet and the
bottom depth is 36.9 feet, shown by the digital sonar. The water temperature is 34.5° F.
Digital depth
Water Temp
Bottom signal
Depth range
at bottom of
th scale
de
Surface signal
Fish symbols
Structure
or cove
Grayline
®
Full Chart page. Fish I.D. (fish symbols) is on by default.
Full Chart
On the Full Chart page, the bottom signal scrolls across the screen
from right to left. The line at the top of the screen represents the surface. The bottom depth is shown in the upper left-hand corner.
If the transducer with a built-in temperature sensor is connected, the
water temperature also will be shown.
22
y
Digital depth
p
r
Water Temp
Bait fish
Bottom signal
Depth range
at bottom of
th scale
de
Surface clutter
Structure
or cove
Fish arches
line
®
Gra
Full Chart page with Fish I.D. turned off.
Depth Range
Depth Range has two modes: Automatic and Manual. In auto range
mode, the unit always keeps the bottom displayed in the lower portion
of the screen. If you want to manually select a depth range, you can
override automatic depth range control.
Depth Range menu with Manual setting selected (left). Range Size
menu with 0-80 ft highlighted (center). Zoom Range menu with the 40-
80 foot zoom selected.
23
To turn off Auto Depth Range:
1. Repeatedly press MENU until the DEPTH RANGE menu appears. Press ↓
to select MANUAL, then press MENU UP to display the RANGE SIZE menu.
2. Use the arrow keys to select a desired depth range. Press
PWR to
clear the menu from the display.
Zoom
The zoom feature enlarges all images on the screen by doubling the size
of the echoes (a 2X zoom).
To turn on the Zoom feature:
1. Press the MENU key until the ZOOM menu appears. Press ↑ to select
ON, then press PWR to clear the menu.
You can tell when the display is in Zoom mode because the top depth
scale on the left of the screen will no longer show zero. If the current
range is 0 to 80 feet, turning on the zoom feature will magnify the water
column between 40 feet to 80 feet.
To turn off the zoom feature:
1. Press the MENU key until the ZOOM menu appears. Press ↓ to select
OFF, then press PWR to clear the menu. The top of the depth range scale
returns to zero.
NOTE:
You can select from these zoom size ranges: 0-10, 5-15, 10-20, 15-