Mercury SMARTCRAFT Instruction manual

90-8M0063595 DECEMBER 2011 © 2011 Mercury Marine Page 1 / 5
SMARTCRAFT DEPTH TRANSDUCER
WIRING CONNECTIONS
IMPORTANT: This document guides our dealers, boatbuilders, and company service personnel in the proper installation or
service of our products. If you have not been trained in the recommended servicing or installation procedures for these or
similar Mercury Marine products, have the work performed by an authorized Mercury Marine dealer technician. Improper
installation or servicing of the Mercury product could result in damage to the product or personal injury to those installing or
operating the product.
NOTE: After completing installation, place these instructions with the product for the owner's future use.
Depth Transducer Dirty Water Explanation and its Limitations
A depth transducer is a device that converts variations in one energy form, into corresponding variations of another energy
form. Acoustical depth transducers produce sonic pulses through water to provide an indication of the depth and will show
other reflective variations in the water. The sonic pulse from a transducer is a cone shaped projection.
Depth transducers may produce erratic readings of the depth when the water quality is degraded by reflective materials such
as refuse, mud, oil, or physical objects in the water; plants, animals, air bubbles or turbulence, reducing the transducer
efficiency to lock onto a bottom depth return signal. These conditions are referred to as dirty water. When a depth transducer
encounters this condition, the return echo reflection signal from the dirty water can cause an unstable depth reading, or a
depth indication that is not accurate.
A depth transducer reading in clean or dirty water conditions, can change rapidly, possibly compromising the vessel because
of conditions underwater any time the vessel is underway. The vessel operator is responsible for understanding water
conditions where the vessel is navigating. The vessel operator should become familiar with the body of water by referring to
nautical charts or communications with other vessel operators, and not rely on the depth transducer only.
Depth Transducer Installation
NOTE: These depth transducers are specially manufactured to be SmartCraft communication compatible.
a - In hull
b - Through‑the‑hull
c - Transom mounted
Install the depth transducer following the instructions provided with the depth finder.
Wire Color Code Abbreviations
Wire Color Abbreviations
BLK Black BLU Blue
BRN Brown GRY Gray
GRN Green ORN or ORG Orange
PNK Pink PPL or PUR Purple
RED Red TAN Tan
WHT White YEL Yellow
LT or LIT Light DK or DRK Dark
Depth Transducer Wiring Connections
NOTE: The transducer wire harness connections are assembled at the factory. However, situations may occur where the
wire harness must be removed from the connector to pass through an opening smaller than the connector. When installing
the wires into the connector, they can only be pushed into the connector one way. Align the wire terminal with the tabs inside
the connector.
1. Route the transducer cable to the engine.
34121
abc
17-501-01 rev.02

SMARTCRAFT DEPTH TRANSDUCER WIRING CONNECTIONS
Page 2 / 5 90-8M0063595 DECEMBER 2011
2. Push each wire terminal into its respective position in the wire retainer until they snap in place.
3. Assemble the wire retainer securely into the connector.
a - Wire retainer
b - Wire terminal
c - Connector
d - Assembled components
e - Transducer connector
f - Temperature/speed sensor connector
Depth Transducer Engine Connections for Verado, OptiMax, MerCruiser with
a 4 Pin Engine Diagnostic Test Connector
1. Locate the engine diagnostic test connector on the engine. Refer to the appropriate service manual.
a. If a depth transducer is installed, disconnect the transducer cable from the engine diagnostic test connector.
a - Engine diagnostic test
connector
b - Transducer cable connector
b. For a new installation, disconnect the weather cap from the engine diagnostic test connector.
2. Connect the diagnostic fuse harness to the engine diagnostic test connector. Refer to the installation instructions with the
diagnostic fuse harness.
cba
PUR
A B C D
A B C D
d
WHT
BLU
BLK
e
cba
GRN
A B C D
A B C D
d
WHT
RED
BRN
f
34123
C - WHT
D - RED
A - BLK
B - DRK BLU
22554
ab

SMARTCRAFT DEPTH TRANSDUCER WIRING CONNECTIONS
90-8M0063595 DECEMBER 2011 Page 3 / 5
3. Connect the transducer cable to the diagnostic fuse harness.
a - Through‑the‑hull transducer (reference)
b - Transducer cable connector
c - Diagnostic fuse harness
d - Fuse cover
e - 2 amp fuse
f - Engine diagnostic test connector
Triducer Engine Connections for Verado, OptiMax, MerCruiser
1. Locate the engine diagnostic test connector on the engine. Refer to the appropriate service manual.
a. If a depth transducer is installed, disconnect the transducer cable from the engine diagnostic test connector.
a - Engine diagnostic test
connector
b - Transducer cable connector
b. For a new installation, disconnect the weather cap from the engine diagnostic test connector.
2. Connect the diagnostic fuse harness to the engine diagnostic test connector. Refer to the installation instructions with the
diagnostic fuse harness.
3. Connect the transducer cable (black, blue, white, purple) to the diagnostic fuse harness.
4. Connect the temperature/speed sensor connector (brown, red, green, white) to the vessel harness connector.
b
c
d
e
f
a
34127
C - WHT
D - RED
A - BLK
B - DRK BLU
22554
ab

SMARTCRAFT DEPTH TRANSDUCER WIRING CONNECTIONS
Page 4 / 5 90-8M0063595 DECEMBER 2011
5. Connect the vessel harness to the engine harness vessel connector.
a - Engine harness vessel connector
b - Engine diagnostic test connector
c - Diagnostic fuse harness
d - Fuse cover
e - 2 amp fuse
f - Transducer cable
g - Vessel harness
h - Fuel 1 sender connector
i - Fuel 2/other sender connector
j - Temperature/speed sensor connector
k - Triducer (reference)
Depth Transducer Engine Connections for OptiMax with a 2 Pin Engine
Diagnostic Test Connector
1. Locate the engine diagnostic test connector on the engine. Refer to the appropriate service manual.
2. Connect the adapter harness to the engine diagnostic test connector.
3. Connect the black wire with the ring terminal into the black wire on the adapter harness.
4. Locate an engine ground connection within reach of the black wire ring terminal. Secure the ring terminal to the engine
ground connection. Apply Liquid Neoprene to the engine ground connection to prevent corrosion.
Tube Ref No. Description Where Used Part No.
25 Liquid Neoprene Adapter harness ring terminal ground connection 92- 25711 3
FUEL 1
FUEL 2 /
OTHER
a
bc
d
ef
g
h
ij
34124
k
PADDLE WHEEL
SEA TEMP

SMARTCRAFT DEPTH TRANSDUCER WIRING CONNECTIONS
Products of Mercury Marine Mercury, Mercury Marine, MerCruiser, Mercury MerCruiser, Mercury Racing, Mercury Precision Parts, Mercury
Propellers, Mariner, Quicksilver, Alpha, Axius, Bravo One, Bravo Two, Bravo Three, K-Planes, MerCathode,
OptiMax, Precision Pilot, Pro Max, SeaCore, Skyhook, SmartCraft, Sport-Jet, Total Command, Verado,
VesselView, Zero Effort, Zeus, #1 On The Water, M with Waves logo, Mercury with Waves logo, and SmartCraft
logo are all registered trademarks of Brunswick Corporation. Mercury Product Protection logo is a registered
service mark of Brunswick Corporation.
W6250 Pioneer Road
Fond du Lac, WI 54936-1939
90-8M0063595 DECEMBER 2011 Page 5 / 5
5. Connect the purple wire from the adapter harness to the engine harness purple wire.
a - Engine harness purple wire female bullet connector
b - Purple wire
c - Female adapter harness connector
d - Black wire
e - Black wire ring terminal
f - Engine diagnostic test connector
6. Connect the diagnostic fuse harness to the adapter harness.
7. Connect the transducer cable connector to the diagnostic fuse harness.
a - Through‑the‑hull transducer (reference)
b - Transducer cable connector
c - Diagnostic fuse harness
d - Fuse cover
e - 2 amp fuse
f - Adapter harness
25481
a
bc
d
e
f
b
c
d
e
f
a
34127