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Eagle 128 Installation And Operation Instructions Manual

Fish-finding & depth sounding sonars.
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Pub. 988-0143-631
Cuda 128, Cuda 128 Portable,
Cuda 168, Cuda 168EX
Fish-finding & Depth Sounding Sonars
Installation and Operation


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   Summary of Contents for Eagle 128

  • Page 1

    Pub. 988-0143-631   Cuda 128, Cuda 128 Portable,   Cuda 168, Cuda 168EX Fish-finding & Depth Sounding Sonars Installation and Operation Instructions...

  • Page 2

    Eagle Electronics Marine-Tex is a trademark of Illinois Tool Works Inc. 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.

  • Page 3: Table Of Contents

    Introduction ... 1 Capabilities and Specifications: Cuda Family ... 1 Installation Preparations ... 3 Transducer Installation... 4 Recommended Tools and Supplies ... 4 Selecting a Transducer Location ... 5 Shoot-Thru-Hull vs. Transom Mounting ... 7 Transom Transducer Assembly and Mounting ... 7 Trolling Motor Bracket Installation...

  • Page 4

    FishTrack™... 43 Chart Scroll Speed ... 44 Noise Reject and ASP (Advanced Signal Processing) ... 44 Alarms ... 45 Fish Alarm... 45 Depth Alarms ... 46 Shallow Alarm... 46 Deep Alarm ... 46 Display Adjustments ... 47 Backlights... 47 Display Contrast ... 47 Depth Units of Measure ...

  • Page 5: Introduction

    And when you finally head for your favorite fishing hole, take this manual along for reference. Capabilities and Specifications: Cuda Family Case size: ... Cuda 128 and Cuda 168: 5.8" H x 4.3" W x Display:... High-contrast Film SuperTwist LCD. Introduction ...

  • Page 6

    Resolution:... Cuda 128 and Cuda 128 Portable: Backlighting:... Backlit screen and keypad for night use. Input power:... 10 to 17 volts DC. Current drain: ... 110 ma lights off; 250 ma lights on. Back-up memory: ... Built-in memory stores sonar settings when Frequency:...

  • Page 7: Installation Preparations

    NOTICE! The storage and operation temperature range for your unit is from -4 degrees to +167 degrees Fahrenheit (-20 degrees to +75 degrees Celsius). Extended storage or operation in temperatures higher or lower than specified will damage the liquid crystal display in your unit.

  • Page 8: Transducer Installation

    Transducer Installation  These instructions will help you install your Skimmer transducer on a transom, on a trolling motor or inside a hull. Please read all instructions before proceeding with any installation. Your Skimmer transducer typically comes packaged with a one-piece stainless steel bracket for mounting it to the transom of your boat.

  • Page 9: Selecting A Transducer Location

    Selecting a Transducer Location 1. The transducer must be placed in a location that has a smooth flow of water at all times. If the transducer is to be mounted inside the hull, then the chosen location must be in the 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.

  • Page 10

    CAUTION: Clamp the transducer cable to transom near the transducer. This will help prevent the transducer from entering the boat if it is knocked off at high speed. Good location Poor angle Good and poor transducer locations. 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.

  • Page 11: Shoot-thru-hull Vs. Transom Mounting

    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.

  • Page 12

    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. Align plastic ratchets in bracket.

  • Page 13

    Ratchets Insert bolt and check transducer position on transom. 3. Assembling the transducer. position for the ratchets, assemble the transducer as shown in the following figure. Don't tighten the lock nut at this time. Assemble transducer and bracket. 4. Drilling mounting holes. Hold the transducer and bracket assembly against the transom.

  • Page 14

    Transom Position transducer mount on transom and mark mounting holes. Side view shown at left and seen from above at right. 5. Attaching transducer to transom. Remove the transducer from the bracket and re-assemble it with the cable passing through the bracket over the bolt as shown in the following figures.

  • Page 15

    Flat-bottom hull Align transducer centerline with hull bottom and attach to transom. 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. If possible, route the transducer cable away from other wiring on the boat.

  • Page 16: Trolling Motor Bracket Installation

    TROLLING MOTOR BRACKET INSTALLATION 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.) Bolt Attach motor mounting bracket to transducer. 2.

  • Page 17

    the transducer is not parallel with the ground when the boat is at rest in the water or at slow trolling speeds. Transducer aimed too far back Full fish arch Transducer angles and their effects on fish arches. If the arch slopes up – but not back down – then the front of the transducer is too high and needs to be lowered.

  • Page 18: Shoot-thru-hull Preparation And Installation

    SHOOT-THRU-HULL PREPARATION The transducer installation inside a fiberglass hull must be in an area that does not have air bubbles in the resin or separated fiberglass layers. The sonar signal must pass through solid fiberglass. A successful transducer installation can be made on hulls with flotation materials (such as plywood, balsa wood or foam) between layers of fiberglass if the material is removed from the chosen area.

  • Page 19

    second bottom echo is seen on the display. (You will need to turn off both automatic and ASP.) Don't touch the controls once they've been set. Next, take the transducer out of the water and place it in the water in the sump of the boat.

  • Page 20: Power And Cable Connections

    Sand this surface 2. Follow the instructions on the epoxy package and mix it thoroughly. Do not mix it too fast, because it will cause bubbles to form in the epoxy. Apply a small amount on the face of the transducer as shown above, then spread a small amount onto the sanded area on the hull.

  • Page 21

    CAUTION: When using the unit in a saltwater environment, we strongly recommend 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.

  • Page 22: Mounting The Sonar Unit: In-dash Or Bracket

    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.

  • Page 23

    For the Cuda 128 and Cuda 168 The Cuda 128 and Cuda 168 both use the same case and can be mounted in-dash using the removable scaled template inside the back cover of this manual (page 55).

  • Page 24

    In-dash mounting template for Cuda 128 and Cuda 168. NOTE: This figure is not printed to scale. See the back of this manual for a scaled template copy you can tear out and use.

  • Page 25: Bracket Installation

    (See the following drawings, which show the dimensions of a gimbal-mounted Cuda 168EX sonar unit and a Cuda 128 or 168.) Holes in the bracket’s base allow wood screw or through-bolt mounting.

  • Page 26

    location. This way, the bracket can be installed so that it covers the hole, holds the cable 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 connector up through the hole from under the dash.

  • Page 27

    Tilt the unit to the desired viewing angle and tighten the knobs finger tight. For the Cuda 128 and Cuda 168 These units use a quick release mounting bracket. When you run the cable through the hole, make sure you allow enough slack for tilting the unit and attaching the connector.

  • Page 28

    Screw hole Power/transducer cable Cuda 128 and 168 quick release mounting bracket. Slots in the base allow routing the cable from beneath the mount. Attach the unit to the bracket by first connecting the power/transducer cable. Then, hold the sonar unit vertically and slide it onto the bracket from above.

  • Page 29: Portable Sonar Installation

    Adjust viewing angle: use one hand to press and release the spring- loaded ratchets while you move the unit with the other hand. Portable Sonar Installation Like many Eagle products, the Cuda sonar family is capable of portable Bracket front Depress...

  • Page 30

    The Cuda 168EX uses the optional PPP-13 portable power pack. The Cuda 128 and Cuda 168 use the optional PPP-12 portable power pack. In fact, the Cuda 128 Portable package includes the PPP- 12 and the transducer necessary for portable use.

  • Page 31

    After installing the batteries, close the case and plug the sonar unit's power cable into the socket on the battery case. "D" cell battery Install batteries in power case battery adapter. PPP-13 shown. Turn the sonar unit on. If it doesn't work, make sure the battery terminals are making good contact against the battery contacts.

  • Page 32

    If the batteries do lose a charge, you can sometimes restore them by placing them in a warm room or car interior. A better way is to replace them with batteries that have been kept warm. WARNING: Never heat the batteries over an open flame or direct hot air onto them.

  • Page 33

    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 allow the bracket to extend below the hull, because water pressure against it can cause the suction cup to come off at speed. Moisten the cup, then press it onto the hull as firmly as possible.

  • Page 34: Operation

    Numbers in the following photos correspond to key explanations in the following pages.: Cuda 128 and Cuda 168EX Sonars, front view, each 1. PWR/CLEAR (power and clear) This key appears in the manual text simply as turn the unit on and off.

  • Page 35: Up And Down Arrows

    the text simply uses the word can simply press the This sonar unit has many features that are accessed with the menu keys. The MENU UP key moves down or backward. To see the first menu, MENU DOWN simply press either key repeatedly to cycle through the menu list.

  • Page 36: Display - Opening Screen

    Menu This screen shows a typical menu, the Scroll Speed menu. DISPLAY – Opening Screen The lights flash for about 20 seconds when the unit is turned on. The backlight menu first appears on the screen. To turn the lights on, press .

  • Page 37: Chart Scroll (stopping And Starting)

    Digital depth Water Temp Bottom signal Depth range at bottom of depth scale Opening screen, Full Chart page, or mode. The factory default setting has the Fish I.D. (fish symbols) turned on. CHART SCROLL (stopping and starting) In normal operation, the sonar chart will scroll from right to left across the screen.

  • Page 38: Full Chart

    Sonar chart with scrolling stopped. FULL CHART This shows all echoes scrolling across the full screen. This is the default 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 (as determined by the digital sonar) shows in the upper left corner.

  • Page 39: Depth Range Zoom (automatic And Manual)

    temperature display can be turned on and off. See the later entry on Temperature Size for off and on instructions DEPTH RANGE ZOOM (automatic and manual) When turned on, the unit automatically adjusts the depth range according to water conditions. When in auto range mode, it always keeps the bottom displayed in the lower portion of the screen.

  • Page 40: Zoom

    ZOOM The zoom feature enlarges all images on the screen by doubling the size of the echoes (a 2X zoom). For example, if the current auto depth range is 0 to 60 feet, Zoom will show an enlarged view of the water column from 30 feet to 60 feet, always keeping the bottom in view.

  • Page 41: Sensitivity

    Use the arrow keys to select a desired zoom size. When you're finished, press Zoom Size menu with the 5-15 foot zoom selected. The boat is in 28 feet of water, but the screen has zoomed in on the water column from 5 to You can select from these zoom size ranges: 0-10, 5-15, 10-20, 15- 30, 20-40, 30-60, 40-80, 60-120, 80-160, 120-140, 160-320, 240-480 and 320-640.

  • Page 42

    adjusting a car's speed with the accelerator pedal while cruise control is on. You can tell the car to run faster, but when you let off the gas the cruise control automatically keeps you from running slower than the minimum speed setting. In your unit, auto mode will let you increase sensitivity to 100 percent, but the unit will limit your minimum setting.

  • Page 43

    Bait school Fig. 1 Fig. 3 These figures show results of different sensitivity levels on the same location. Fig. 1: Sensitivity at 98 percent, determined by Auto Sensitivity. Typical of full auto mode. Fig. 2: Sensitivity set at 71 percent. Fig. 3: Sensitivity set at 47 percent. Fig. 4: Sensitivity set at To adjust sensitivity: Press MENU...

  • Page 44: Grayline

    The sensitivity percentage in use shows in this menu. As you change the setting, echoes scrolling onto the screen will show the effects of the change. If you reach the maximum or minimum sensitivity level, a tone sounds alerting you to the limits. NOTE: If you want to change the sensitivity in Manual Mode, first turn off Auto Sensitivity: press...

  • Page 45: Fish I.d

    Thin or no Grayline At left, little Grayline indicates a soft bottom, probably sand or mud. At right, the wider Grayline indicates a harder, rocky bottom. Press UP ARROW decrease it. The percentage of Grayline in use shows in this menu. Echoes scrolling onto the screen will also show the effects of the Grayline change.

  • Page 46

    Fish arches At left, underwater scene in normal fish arch mode. Right, Fish I.D. menu with the feature turned on. Fish I.D. is an easier way for a sonar novice to recognize a fishy signal return when he sees it. However, locating fish by symbol only has some limitations.

  • Page 47: Fishtrack

    Fish I.D. is most handy when you're in another part of the boat or performing some task that prevents you from watching the sonar screen. Then, you can turn on Fish I.D. and the audible When that lunker swims under your boat, you'll hear it! Fish I.D.

  • Page 48: Chart Scroll Speed

    CHART SCROLL SPEED The rate that echoes scroll across the screen is called the chart scroll speed. The default for this unit is "max" (100 percent); we recommend that you leave the scroll speed set there for virtually all fishing conditions. However, you might consider experimenting with chart speed when you are stationary or drifting very slowly.

  • Page 49: Alarms

    over the face of the transducer, even vibration from the engine. In all cases, noise can produce unwanted marks on the display. The ASP noise rejection feature is especially useful because it typically lets you operate the boat at all speeds without adjusting the sensitivity or other controls.

  • Page 50: Depth Alarms

    press to clear the menu. Repeat the above steps to turn the alarm back on, but press UP ARROW Depth Alarms The depth alarms are triggered only by the bottom signal. No other echoes will activate these alarms. The depth alarms consist of a shallow and a deep alarm.

  • Page 51: Display Adjustments

    setting. When the number reaches the desired setting, press clear the menu. When the bottom depth goes deeper than the alarm’s setting, an alarm tone sounds and a message box appears on the screen. Press to silence the alarm. This turns the alarm sound off until the deep alarm is triggered again.

  • Page 52: Depth Units Of Measure

    DEPTH UNITS OF MEASURE This unit can show the depth in feet or meters. To change the depth units of measure, press until the the desired unit of measure, then press the the menu. PRESET UNIT (reset all options) This command is used to reset all features, options and settings to their original factory defaults.

  • Page 53: Digital Data Size For Depth And Temperature

    DIGITAL DATA SIZE FOR DEPTH and TEMPERATURE The size of the digital numbers for the depth be changed to medium or large. The digital display for both Depth and Temperature can also be turned off or on. To change either of these options, press until either the DOWN appears, then use the...

  • Page 54: Troubleshooting

    Troubleshooting If your unit is not working, or if you need technical help, please use the following troubleshooting section before contacting the factory customer service department. It may save you the trouble of returning your unit for repair. For contact information, refer to the last page, just inside the back cover of this manual.

  • Page 55

    Weak bottom echo, digital readings erratic, or no fish signals: 1. Make certain the transducer is pointing straight down. Clean the face of the transducer. Oil, dirt and fuel can cause a film to form on the transducer, reducing its effectiveness. If the transducer is mounted inside the hull, be sure it is shooting through only one layer of fiberglass and that it is securely bonded to the hull.

  • Page 56

    spark plugs or routing the sonar unit's power and transducer cables away from other electrical wiring on the boat. No fish arches when the Fish I.D. feature is off: 1. Make certain the transducer is pointing straight down. This is the most common problem if a partial arch is displayed.

  • Page 57

    example, turn on the bilge pump and view the sonar display for noise. If no noise is present, turn the pump off, then turn on the VHF radio and transmit. Keep doing this until all electrical equipment has been turned on, their effect on the sonar display noted, then turned off. If you find noise interference from an electrical instrument, trolling motor, pump, or radio, try to isolate the problem.

  • Page 58

    Notes If the dash mount template on page 55 has been removed from this manual, a free replacement manual containing the template can be downloaded from our web site,

  • Page 59

    The vertical line and the horizontal line should each be 2 inches long (50.8 mm.) Cut along this line In-dash mounting template for Cuda 128 and Cuda 168. NOTE: This figure is printed to scale. For use with FM-6 mount kit.

  • Page 60


  • Page 61: Warranty And Service Information

    EAGLE ELECTRONICS FULL ONE-YEAR WARRANTY "We," "our," or "us" refers to EAGLE ELECTRONICS, a division of LEI, the manufacturer of this product. "You" or "your" refers to the first person who purchases this product as a consumer item for personal, family, or household use.

  • Page 62: How To Obtain Service

    8 a.m. to 5 p.m. Central Standard Time, M-F Eagle Electronics may find it necessary to change or end our shipping policies, regulations, and special offers at any time. We reserve the right to do so without notice.

  • Page 63

    1. Always use the original shipping container and filler material the product was packed in. 2. Always insure the parcel against damage or loss during shipment. Eagle does not assume responsibility for goods lost or damaged in transit. 3. For proper testing, include a brief note with the product describing the problem.

  • Page 64

    Eagle Pub. 988-0143-631 Printed in USA 111902 Visit our web site:  © Copyright 2002 All Rights Reserved Eagle Electronics...

This manual also for:

168, Cuda 168ex, Cuda 128 portable, Cuda 168

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