Lowrance Mark-4 Sonar and DSI Installation Manual
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- Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 1
to power and installing the unit on the bracket mount. The first section of the document covers the installation of a traditional sonar skimmer transducer. DSI sonar installation is covered in the last section of the manual. Make sure you read all the installation instructions before drilling holes - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 2
dots. The unit also could lose bottom signal when the boat is on plane. NOTE: Mount the transducer at least one foot away from the engine lower unit. B. Aligning Ratchets on bracket You will use the ratchets to ensure the transducer is installed parallel to the ground. 1. Insert the ratchets in the - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 3
so its face is parallel to the ground, remove the transducer and ratchets from the bracket. Reinsert the ratchets into the bracket, this time with the letter "B" aligned with the dot stamped in the bracket. Reassemble the transducer and bracket and place it against the transom. 5. Check to see if - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 4
line is even with the bottom of the boat hull. 2. Hold the transducer and bracket assembly against the transom. When the transducer and bracket are properly aligned mark its position on the hull. 3. Drill the mounting holes for the transducer bracket. Use a #29 bit (for the #10 screws). Transom - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 5
slots in the transducer mounting bracket to loosen the screws and slide the transducer up or down, if adjustments are necessary. Traditional Sonar Transducer epoxied to hull Transducer Epoxy Shoot-thru-hull Skimmer and Pod transducer installation Before attempting any installation on boats with - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 6
with the hull. Also, make sure the cable is long enough to reach the sonar unit. To use shoot-thru-hull installation: 1. Sand the inside surface of the hull, where the transducer is to be epoxied, and the face of the transducer. Sand the hull until it is smooth to the touch. The sanded area - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 7
-45) is an optional accessory and is available through LEI Extras at www.lei-extras.com. The TMB-S bracket is used to attach a one-piece bracket skimmer transducer to a trolling motor. The Pod transducer does not need a TMB-S trolling motor bracket to be installed on a trolling motor. It only needs - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 8
(+) terminal on the battery. 3. Connect the Power cable to the Power port on the back of the display unit. 4. Tighten the adjustable strap securely to the trolling motor. Make sure there is enough slack in the transducer cable for the trolling mount to turn freely. NOTE: Use 18 gauge wire to - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 9
Red (power) wire Power port 3 Amp fuse (not included) Black (ground) wire 12V 9 0.TWEETY INSTALL_SONAR_DSI.indd 9 Traditional Sonar External GPS port Speed/temp port; also used for NMEA 0183 Optional temp sensor Optional paddlewheel speed/temp sensor 9/14/2011 11:55:34 PM - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 10
Traditional Sonar NMEA 0183 Connection Diagram (GPS capable units only) 0.TWEETY INSTALL_SONAR_DSI.indd 10 NDC-4 Temp /Speed port Yellow TX NMEA0183 NMEA IN (+) Shield (ground) NMEA IN (-) Optional NMEA 0183 cable 10 9/14/2011 11:55:35 PM - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 11
the area that will obstruct the display unit when it is installed on the bracket. To install bracket mount: 1. Place the bracket on the desired mounting surface and mark the four mounting holes. If you want to run the unit's cables up through the mounting surface, make a mark in the center of the - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 12
Display unit Removing the unit from the bracket 12 0.TWEETY INSTALL_SONAR_DSI.indd 12 9/14/2011 11:55:40 PM - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 13
DSI series transducer and display unit installation. WARNING: Make sure you read all installation instructions before drilling holes in your vessel. (Tools and Supplies - not included) Drill Marine grade below waterline sealant 1" (25mm) or 5/8" (15mm) drill bit Zip ties (trolling motor mount - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 14
DSI Sonar Transducer bracket assembly Rubber washer Metal washer Ratchets Transducer bracket Bolt Transducer 0.TWEETY INSTALL_SONAR_DSI.indd 14 Metal washer Rubber washer Nut 14 9/14/2011 11:55:41 PM - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 15
DSI Sonar Good location Poor angle Poor location Too high Aligning transducer ratchets Ratchets are used to ensure the transducer is installed parallel to the ground. 1. Insert the ratchets in the bracket with the letter "A" aligned with the dot stamped on the outside of the transducer bracket. - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 16
assembly against the transom. When the transducer and bracket are properly aligned mark its position on the hull. Mounting to transom 1. Adjust the transducer so its face is parallel with the ground and its center is even with the bottom of the boat hull. 16 0.TWEETY INSTALL_SONAR_DSI.indd 16 - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 17
for shoot-thru installations. This is not a recommended installation method since it significantly degrades DSI performance. Mounting on trolling motor Using a flathead screwdriver, depress the release tab and slide off the transducer mount. The optional DSI trolling motor accessory (pn: 00010261 - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 18
DSI Sonar Installing transducer on trolling motor: 1. Place the DSI transducer inside the trolling motor housing. 2. Slide the adjustable strap (hose clamp) through the slots in the trolling motor housing and slip the strap around the trolling motor. Slide the adjustable strap through these - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 19
DSI Wiring Diagram DSI Sonar Fuse (not included) Transducer/ power cable DSI filter cable Battery Optional speed sensor DSI transducer 19 0.TWEETY INSTALL_SONAR_DSI.indd 19 Optional temp sensor 9/14/2011 11:55:44 PM - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 20
NMEA 0183 Connection Diagram (GPS capable units only) NDC-4 Temp /Speed port Yellow TX NMEA0183 NMEA IN (+) Shield (ground) NMEA IN (-) Optional NMEA 0183 cable 0.TWEETY INSTALL_SONAR_DSI.indd 20 9/14/2011 11:55:45 PM - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 21
0.TWEETY INSTALL_SONAR_DSI.indd 21 9/14/2011 11:55:45 PM - Lowrance Mark-4 | Sonar and DSI Installation Manual - Page 22
Visit our website: www.lowrance.com *988-10169-001* 0.TWEETY INSTALL_SONAR_DSI.indd 22 Copyright © 2011 All Rights Reserved Navico Holding AS 9/14/2011 11:55:45 PM
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Traditional Sonar and DSI Sonar Installation
This document covers the installation of the transducer and display unit installation, which includes con-
necting the unit to power and installing the unit on the bracket mount.
The first section of the document covers the installation of a traditional sonar skimmer transducer. DSI
sonar installation is covered in the last section of the manual.
Make sure you read all the installation instructions before drilling holes in your vessel!
Traditional Sonar Transducer Installation
One piece bracket (Recommended Tools and Supplies — not included)
Drill
Marine grade above-or-below waterline sealant
1” (25mm) or 5/8” (15mm) drill bit
Marine grade epoxy (Shoot-thru-hull install only)
#29 (0.136”) (3mm) drill bit
Zip ties (trolling motor mount)
Phillips (Slotted-head) screwdriver
TMB-S bracket kit (Skimmer trolling motor mount)
NOTE
:
This majority of this installation does not apply to the GPS only units since they do
not have a transducer. Turn to pages 8-11 for information on mounting the display unit and
connecting the unit to power.
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