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7/28/2019 Merc Elecs
1/32
7/28/2019 Merc Elecs
2/324F-0 - WIRING DIAGRAMS 90-823224--2 796
Table of ContentsPage
Wiring Colors for MerCruiser 4F-1. . . . . . . . . . . . . . .Engine 4F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MCM (Stern Drive) 4F-2. . . . . . . . . . . . . . . . . . . . .MIE (Inboard) Models 4F-10. . . . . . . . . . . . . . . . .
Quicksilver Instrumentation 4F-13. . . . . . . . . . . . . . .MCM (Stern Drive) 4F-13. . . . . . . . . . . . . . . . . . . .MIE (Inboard) 4F-16. . . . . . . . . . . . . . . . . . . . . . . .Dual Station Wiring (Using a Neutral SafetySwitch in Only One Remote Control) 4F-18. . . .Dual Station Wiring (Using A Neutral SafetySwitch In Both Remote Controls) 4F-19. . . . . . .Dual Station Wiring (Using a Neutral SafetySwitch in Engine Wiring Harness) 4F-20. . . . . . .Multi-Port Injection Wiring Diagram(Chart 1 Of 4) 4F-21. . . . . . . . . . . . . . . . . . . . . . . .
Multi-Port Injection Wiring Diagram(Chart 2 Of 4) 4F-22. . . . . . . . . . . . . . . . . . . . . . . .
Multi-Port Injection Wiring Diagram(Chart 3 Of 4) 4F-23. . . . . . . . . . . . . . . . . . . . . . . .
Multi-Port Injection Wiring Diagram(Chart 4 Of 4) 4F-24. . . . . . . . . . . . . . . . . . . . . . . .
Throttle Body Injection Wiring Diagram(Chart 1 Of 4) 4F-25. . . . . . . . . . . . . . . . . . . . . . . .
Throttle Body Injection Wiring Diagram(Chart 2 Of 4) 4F-26. . . . . . . . . . . . . . . . . . . . . . . .
Throttle Body Injection Wiring Diagram(Chart 3 Of 4) 4F-27. . . . . . . . . . . . . . . . . . . . . . . .
Throttle Body Injection Wiring Diagram(Chart 4 Of 4) 4F-28. . . . . . . . . . . . . . . . . . . . . . . .
Index
7/28/2019 Merc Elecs
3/32WIRING DIAGRAMS - 4F90-823224--2 796
Wiring Colors for MerCruiser
NOTE:Color codes listed below DO NOT apply to fuel injection system harnesses.
BIA COLOR CODE AND ABBREVIATIONS WHERE USED
BLACK (BLK) All Grounds
BROWN (BLU) Reference Electrode - MerCathode
ORANGE (ORN) Anode Electrode-MerCathode
LT. BLUE/WHITE (LT BLU/WHT) Trim - Up Switch
GRAY (GRY) Tachometer Signal
GREEN/WHITE (GRN/WHT) Trim - Down Switch
TAN (TAN) Water Temperature Sender to Gauge
LIGHT BLUE (LIT BLU) Oil Pressure Sender to Gauge
PINK (PNK) Fuel Gauge Sender to Gauge
BROWN/WHITE (BRN/WHT) Trim Sender to Trim Gauge
PURPLE/WHITE (PUR/WHT) Trim - Trailer Switch
RED (RED) Unprotected Wires from Battery
RED/PURPLE (RED/PUR) Protected (Fused) Wires from Battery
RED/PURPLE (RED/PUR) Protected (+12V) to Trim Panel
ORANGE (ORN) Alternator Output
PURPLE/YELLOW (PUR/YEL) Ballast Bypass
PURPLE (PUR) Ignition Switch (+12V)
YELLOW/RED (YEL/RED)Starter Switch to Starter Solenoid to Neutral StartSwitch
Index
7/28/2019 Merc Elecs
4/324F-2 - WIRING DIAGRAMS 90-823224--2 796
Engine
MCM (Stern Drive)
THUNDERBOLT IV WITH IGNITION MODULE MOUNTED ON EXHAUST ELBOW
50844
2
3
1
1
2
3
4
5
6
12
3
1
2
3 3
A - Ignition And Choke System
1 - Distributor2 - Ignition Module3 - Ignition Coil
B - Starting And Charging System
1 - Alternator2 - Ground Stud3 - Battery4 - Starter Motor5 - Circuit Breaker6 - Starter Slave Solenoid
C - Audio Warning System
1 - Oil Pressure Sender2 - Water Temperature Sender3 - Trim Sender
D - Instrumentation System
1 - Water Temperature2 - Oil Pressure Switch3 - Drive Unit Oil Bottle (Old And New Style)
Index
7/28/2019 Merc Elecs
5/32WIRING DIAGRAMS - 4F90-823224--2 796
THUNDERBOLT IV WITH IGNITION MODULE MOUNTED ON DISTRIBUTOR
72936
WHT/RED
WHT/GRN
GRY
PUR
1
2
1
2
3
4
5
6
12
3
1
2
3 3
AA
D
B
C
A - Ignition And Choke System
1 - Distributor With Ignition Module2 - Ignition Module3 - Ignition Coil
B - Starting And Charging System
1 - Alternator2 - Ground Stud3 - Battery4 - Starter Motor5 - Circuit Breaker6 - Starter Slave Solenoid
C - Audio Warning System
1 - Oil Pressure Sender2 - Water Temperature Sender3 - Trim Sender
D - Instrumentation System
1 - Water Temperature2 - Oil Pressure Switch3 - Drive Unit Oil Bottle (Old And New Style)
Index
7/28/2019 Merc Elecs
6/324F-4 - WIRING DIAGRAMS 90-823224--2 796
THUNDERBOLT V
73996
A
56
2
1
3
4
1
2
3
4
7
13
1
2
3
A
D
2
B
C
A - Ignition And Choke System1 - Distributor With Ignition Module2 - Timing Lead3 - Knock Sensor4 - Ignition Coil
B - Starting And Charging System
1 - Alternator2 - Electric Choke3 - Ground Stud4 - Battery5 - Starter Motor6 - Circuit Breaker7 - Starter Slave Solenoid
C - Audio Warning System1 - Oil Pressure Sender2 - Water Temperature Sender3 - Trim Sender
D - Instrumentation System
1 - Water Temperature2 - Oil Pressure Switch3 - Drive Unit Oil Bottle (Old And New Style)
Index
7/28/2019 Merc Elecs
7/32WIRING DIAGRAMS - 4F90-823224--2 796
ALL MCM THROTTLE BODY / MULTI-PORT INJECTION STARTING AND CHARGING DIAGRAM
7169
1
2
3
4
5
6
1
2
3
1
22
b
c
a
dAA
B
C
A - Charging And Starting System
1 - Alternator
2 - Ground Stud3 - Starter Motor4 - Battery5 - Circuit Breaker6 - Starter Slave Solenoid
B - Audio Warning System / Power ReductionCircuit (Not Present On 1996 And Newer Models)
1 - Oil Pressure2 - Drive Unit Oil Level Bottle (New And Old Style)
C - Instrumentation System
1 - Oil Pressure Sender
2 - Water Temperature Sender3 - Trim Sender
a - Positive (12V) Power Wire To Furl Injection SystemHarness
b - Harness Connector To Fuel Injection System Harness
c - Auxiliary Tachometer Lead
d - 90 Amp. Fuse (DO NOT Remove)
Index
7/28/2019 Merc Elecs
8/324F-6 - WIRING DIAGRAMS 90-823224--2 796
ALL THROTTLE BODY / MULTI-PORT INJECTION INBOARD AND SKI ENGINES
2
b
c
a
1
3
5
4
6
12
1
2
NOTE 1
d
AA
B
C
NOTE 1: Taped back BROWN and BLACK wire may be used for an accessory. LOAD MUST NOT EXCEED 5AMPS
A - Audio Warning System
1 - Oil Pressure Switch2 - Transmission Fluid Temperature
B - Instrumentation System
1 - Oil Pressure Sender2 - Water Temperature Sender
C - Charging And Starting System
1 - Alternator2 - Ground Stud3 - Starter
4 - Circuit Breaker5 - Starter Slave Solenoid6 - Neutral Safety Switch
a - Positive (12V) Power Wire To Fuel Injection SystemHarness
b - Harness Connector To Fuel Injection System Harness
c - Auxiliary Tachometer Lead
d - 90 Amp. System Fuse
Index
7/28/2019 Merc Elecs
9/32WIRING DIAGRAMS - 4F90-823224--2 796
MCM 7.4LX / MIE 7.4L THROTTLE BODY INJECTION
75001
2
3
4
5
6
7
8
9
10
11
1
12
13
14
15
16
17
18
19
NOTE 1
Note: All BLACK Wires With A Ground Symbol Are Interconnected Within The Fuel Injection System Harnes
NOTE 1: As a mid year (96-1/2) model change, the Throttle Body and Multi-Port Injection models have the layard stop connector removed from the wiring harness. The dual engine capability is relocated by routing the YEwire to the Data Link Connector (DLC).
1 - Fuel Pump2 - Throttle Body3 - Distributor4 - Coil5 - Electronic Spark Control (KS) Module6 - Data Link Connector (DLC)7 - Manifold Absolute Pressure (MAP) Sensor8 - Knock Sensor9 - Idle Air Control (IAC)10- Throttle Position (TP) Sensor
11- Engine Coolant Temperature (ECT) Sensor12- Electronic Control Module (ECM)13- Fuel Pump Relay14- Ignition/System Relay15- Fuse (15 Amp) Fuel Pump16- Fuse (15 Amp) ECM/DLC/Battery17- Fuse (10 Amp) ECM/Injector/Ignition/Knock Module18- Harness Connector To Starting/Charging Harness19- Positive (+) Power Wire To Engine Circuit Breaker
Index
7/28/2019 Merc Elecs
10/324F-8 - WIRING DIAGRAMS 90-823224--2 796
7.4L / 7.4LX / 454 / 502 MULTI-PORT MAGNUM ENGINE DIAGRAM MODELS WITH VST
71692
1
2
3
4
5
6
7
8
9
1011
12
13
14
15
16
17
18
19
20
21
22
NOTE 1
NOTE 1: As a mid year (96-1/2) model change, the Throttle Body and Multi Port Injection models have the lan-yard stop connector removed from the wiring harness. The dual engine capability is relocated by routing the YELwire to the Data Link Connector (DLC).
NOTE 2: All BLACK wires with a ground symbol are interconnected within the fuel injection system harness.
1 - Vapor Separator Tank2 - Throttle Body3 - Distributor4 - Coil5 - Knock Sensor (KS) Module6 - Data Link Connector (DLC)7 - Manifold Absolute Pressure (MAP) Sensor8 - Intake Air Temperature (IAT) Sensor9 - Knock Sensor (KS)10- Idle Air Control (IAC)11- Throttle Positive Sensor (TP)
12- Engine Coolant Temperature (ECT) Sensor13- Electronic Control Module (ECM) Sensor14- Fuel Pump Relay15- Ignition Relay16- Fuel Pump Relay (15 Amp)17- Injector Fuse 15 Amp.) ECM, DLC, Battery18- ECM Fuse (10 Amp.) ECM, Ignition, Injectors, Knock Sen-
sor Module19- Harness Connector To Starting / Charging Harness20- Harness Connector To Lanyard Stop Switch (Optional)21- Harness Connector For Dual Engine Data Link Cable22- Positive (+) Power Wire To Engine Circuit Breaker
Index
7/28/2019 Merc Elecs
11/32WIRING DIAGRAMS - 4F90-823224--2 796
7.4L / 7.4LX / 454 / 502 MULTI-PORT MAGNUM ENGINE DIAGRAM MODELS WITH COOL FUELSYSTEM
7514
1
2
3
4
5
6
7
8
910
11
12
13
14
15
16
17
18
19
NOTE:All BLACK wires with a ground symbol are interconnected within the EFI system harness.
1 - Fuel Pump2 - Throttle Body3 - Distributor4 - Coil5 - Electronic Spark Control (KS) Module6 - Data Link Connector (DLC)7 - Manifold Absolute Pressure (MAP) Sensor8 - Knock Sensor9 - Idle Air Control (IAC)10- Throttle Position (TP) Sensor
11- Engine Coolant Temperature (ECT) Sensor12- Electronic Control Module (ECM)13- Fuel Pump Relay14- Ignition/System Relay15- Fuse (15 Amp) Fuel Pump16- Fuse (15 Amp) ECM/DLC/Battery17- Fuse (10 Amp) ECM/Injector/Ignition/Knock Module18- Harness Connector To Starting/Charging Harness19- Positive (+) Power Wire To Engine Circuit Breaker
Index
7/28/2019 Merc Elecs
12/324F-10 - WIRING DIAGRAMS 90-823224--2 796
MIE (Inboard) Models
THUNDERBOLT IV WITH IGNITION MODULE MOUNTED ON EXHAUST ELBOW
50773
A
B
C
D
1
2
3
1
2
3
4
5
6
7
1
NOTE2
1
2 3
NOTE:Taped Back BROWN-WHITE wire may be used for an accessory. LOAD MUST NOT EXCEED 5 AMPS.
A - Ignition And Choke System
1 - Distributor2 - Ignition Module3 - Ignition Coil
B - Starting And Charging System
1 - Alternator2 - Ground Stud3 - Battery4 - Starter Motor5 - Circuit Breaker6 - Neutral Start Safety Switch7 - Starter Slave Solenoid
C - Audio Warning System
1 - Water Temperature2 - Oil Pressure3 - Transmission Fluid Temperature
D - Instrumentation System
1 - Oil Pressure Sender2 - Water Temperature Sender
Index
7/28/2019 Merc Elecs
13/32WIRING DIAGRAMS - 4F-190-823224--2 796
THUNDERBOLT IV IGNITION MODULE MOUNTED ON DISTRIBUTOR
72937
WHT/RED
WHT/GRN
GRY
PUR
1
2
3
1
2
3
45
6
7
1
B
D
NOTE
1
2
2
AA C
NOTE:Taped Back BROWN-WHITE wire may be used for an accessory. LOAD MUST NOT EXCEED 5 AMP
A - Ignition And Choke System
1 - Distributor2 - Ignition Module3 - Ignition Coil
B - Starting And Charging System
1 - Alternator2 - Ground Stud3 - Battery4 - Starter Motor5 - Circuit Breaker6 - Neutral Start Safety Switch7 - Starter Slave Solenoid
C - Audio Warning System
1 - Water Temperature2 - Oil Pressure3 - Transmission Fluid Temperature
D - Instrumentation System
1 - Oil Pressure Sender2 - Water Temperature Sender
Index
7/28/2019 Merc Elecs
14/324F-12 - WIRING DIAGRAMS 90-823224--2 796
THUNDERBOLT V
74160
A
B
C
D
NOTE
1
2
3
4
1
2 3
4
5
6
7
8
1
2
3
1
2
NOTE:Taped Back BROWN-WHITE wire may be used for an accessory. LOAD MUST NOT EXCEED 5 AMPS.
A - Ignition And Choke System
1 - Distributor With Ignition Module2 - Timing Lead3 - Knock Sensor4 - Ignition Coil
B - Starting And Charging System
1 - Alternator2 - Electric Choke3 - Ground Stud4 - Battery5 - Starter Motor6 - Circuit Breaker7 - Starter Slave Solenoid8 - Neutral Start Safety Switch
C - Audio Warning System
1 - Water Temperature Sender2 - Oil Pressure Sender3 - Transmission Fluid Temperature
D - Instrumentation System
1 - Water Temperature2 - Oil Pressure Switch
Index
7/28/2019 Merc Elecs
15/32WIRING DIAGRAMS - 4F-190-823224--2 796
Quicksilver Instrumentation
MCM (Stern Drive)
EARLIER STYLE CONTROL AND AUDIO WARNING BUZZER
72938
1
2 3 4 5
6
7
8
NOTES 1 & 2
Refer to gauge manufacturers instructions for specific connections.
NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubbsleeve over connection.
NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 35-4amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) haness wire connected to it.
1 - Audio Warning Buzzer (If So Equipped)2 - Tachometer3 - Oil Pressure4 - Water Temperature
5 - Battery Meter6 - Ignition Switch7 - Trim Indicator8 - 20 Amp. Fuse
Index
7/28/2019 Merc Elecs
16/324F-14 - WIRING DIAGRAMS 90-823224--2 796
454/502 MAGNUM MULTI-PORT INJECTION WITH EARLIER STYLE CONTROLS AND AUDIOWARNING BUZZER
71695
1
23 4 5
6 78
NOTES 1 & 2
Refer to gauge manufacturers instructions for specific connections.
NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubbersleeve over connection.
NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 40amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) har-ness wire connected to it.
1 - Audio Warning Buzzer (If Equipped)2 - Tachometer3 - Oil Pressure4 - Water Temperature
5 - Battery Meter6 - Ignition Switch7 - Trim Indicator8 - 20 Amp. Fuse
Index
7/28/2019 Merc Elecs
17/32WIRING DIAGRAMS - 4F-190-823224--2 796
LATER STYLE CONTROLS AND AUDIO WARNING BUZZER
NOTE 1
NOTE 1
NOTE 1
NOTE 2
74046
1
23 4 5
67
8
Refer to gauge manufacturers instructions for specific connections.
NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubbsleeve over connection.
NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 4amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) haness wire connected to it.
1 - Audio Warning Buzzer (If Equipped)2 - Tachometer3 - Oil Pressure4 - Water Temperature
5 - Battery Meter6 - Ignition Switch7 - Trim Indicator8 - 20 Amp. Fuse
Index
7/28/2019 Merc Elecs
18/324F-16 - WIRING DIAGRAMS 90-823224--2 796
MIE (Inboard)
EARLIER STYLE AUDIO WARNING BUZZER
72939
BS
I
1
23 4 5
6 7
Refer to gauge manufacturers instructions for specific connections.
NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubbersleeve over connection.
NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 40amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) har-ness wire connected to it.
1 - Audio Warning Buzzer (If So Equipped)2 - Tachometer3 - Oil Pressure4 - Water Temperature
5 - Battery Meter6 - Ignition Switch7 - 20 Amp. Fuse
Index
7/28/2019 Merc Elecs
19/32WIRING DIAGRAMS - 4F-190-823224--2 796
LATER STYLE AUDIO WARNING BUZZER
74274
B
SI
1
2
3 4 5
6
8
7
Refer to gauge manufacturers instructions for specific connections.
NOTE 1: Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection anslide rubber sleeve over connection.
NOTE 2: Power for a second fused accessory panel may be taken from this connection. Load MUST NOT eceed 35-40 amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLAC(ground) harness wire connected to it.
1 - Audio Warning Buzzer (If So Equipped)2 - Tachometer3 - Oil Pressure4 - Water Temperature
5 - Battery Meter6 - Ignition Switch7 - To 12 Volt Source (PURPLE Wire Connection)8 - 20 Amp. Fuse
Index
7/28/2019 Merc Elecs
20/324F-18 - WIRING DIAGRAMS 90-823224--2 796
Dual Station Wiring (Using a Neutral Safety Switch in Only One RemoteControl)
72940
BRN/WHT
PUR
GRY
BLK
YEL/RED
NOTE 3
PUR
PUR
GRY
BLK
BLK
LT.BLU
BLK
PUR
TAN
PUR
BLK
RED/PUR
PURPUR
GRY B
LK
BLK
PUR
LT.BLU
BLK
PUR
TAN
RED/PUR
PUR
BLK NOTE 2
NOTE 3
NOTE 1
YEL/RED
YEL/RED
NOTE 3
NOTE 3
BRN/WHTNOTE 1
YEL/RED
YEL/RED
YEL/RED
BS
I
SEND SEND SEND
LT
LT
LT
LT
SW
12V12V 12V 12V
GND
UNSW
SIG
GND GND GND
SEND SEND SEND
LT
LT
LT
LT
SW
12V12V 12V 12V
GND
UNSW
SIG
GND GND GND
34 51
2
A
B
1 2 3 4 5
6
7
RED/PUR
NOTE 1: BROWN/WHITE wire is taped back at instrument end. If installing on boat that is equipped with Mer-Cruiser stern drive, BROWN/WHITE wire is connected to trim sender terminal block. If installing on MerCruiserInboard, BROWN/WHITE wire is taped back at engine end, or it may be used for an accessory (limit 5 amperes).
NOTE 2 : An accessory fuse panel may be connected at this location. The combined current draw of the primary
station and secondary station MUST NOT exceed 35 amperes.
NOTE 3 : Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection andslide rubber sleeve over connection.
B - Secondary Station
1 - Start - Stop Panel2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter
B - Primary Station
1 - Ignition Switch2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter
Index
7/28/2019 Merc Elecs
21/32WIRING DIAGRAMS - 4F-190-823224--2 796
Dual Station Wiring (Using A Neutral Safety Switch In Both Remote Controls)
729
BRN/WHT
PUR
GRY
BLK
YEL/RED
NOTE 3
PUR
PUR
GRY
BLK
BLK
LT.BLU
BLK
PUR
TAN
PUR
BLK
RED/PUR
ORN
PURPUR
GRY
BLK
BLK
PUR
LT.BLU
BLK
PUR
TAN
RED/PUR
PUR
BLK NOTE 2
NOTE 3
NOTE 1
YEL/RED
YEL/RED
NOTE 3 BRN/WHTNOTE 1
YEL/RED
YEL/RED
YEL/REDNOTE 3
NOTE 3
YEL/RED
SEND SEND SEND
LT
LT
LT
LT
SW
12V12V 12V 12V
GND
UNSW
SIG
GND GND GND
BS
I
SEND SEND SEND
LT
LT
LT
LT
SW
12V12V 12V 12V
GND
UNSW
SIG
GND GND GND
3 4 51 2
12
3 4 5
7
6
YEL/RED
A
B
RED/PUR
NOTE 1: BROWN/WHITE wire is taped back at instrument end. If installing on boat that is equipped with MeCruiser stern drive, BROWN/WHITE wire is connected to trim sender terminal block. If installing on MerCruisInboard, BROWN/WHITE wire is taped back at engine end, or it may be used for an accessory (limit 5 amperes
NOTE 2 : An accessory fuse panel may be connected at this location. The combined current draw of the prima
station and secondary station MUST NOT exceed 35 amperes.NOTE 3 : Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection anslide rubber sleeve over connection.
A - Secondary Station
1 - Start - Stop Panel2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter
B - Primary Station
1 - Ignition Switch2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter6 - To Engine7 - 20 Ampere Fuse
Index
7/28/2019 Merc Elecs
22/324F-20 - WIRING DIAGRAMS 90-823224--2 796
Dual Station Wiring (Using a Neutral Safety Switch in Engine Wiring Harness)
72942
BRN/WHT
PUR
GRY
BLK
YEL/RED
NOTE 3
PUR
PUR
GRY
BLK
BLK
LT.BLU
BLK
PUR
TAN
PUR
BLK
RED/PUR
PUR PUR
GRY
BLK
BLK
PUR
LT.BLU
BLK
PUR
TAN
RED/PUR
PUR
BLK NOTE 2
NOTE 3
NOTE 1
YEL/RED
YEL/RED
NOTE 3
NOTE 3BRN/WHTNOTE 1
YEL/RED
YEL/RED
SEND SEND SEND
LT
LT
LT
LT
SW
12V12V 12V 12V
GND
UNSW
SIG
GND GND GND
BS
I
SEND SEND SEND
LT
LT
LT
LT
SW
12V12V 12V 12V
GND
UNSW
SIG
GND GND GND
3 4 51 2
12
3 4 5
7
6
A
B
RED/PUR
NOTE 1: BROWN/WHITE wire is taped back at instrument end. If installing on boat that is equipped with Mer-Cruiser stern drive, BROWN/WHITE wire is connected to trim sender terminal block. If installing on MerCruiserInboard, BROWN/WHITE wire is taped back at engine end, or it may be used for an accessory (limit 5 amperes).
NOTE 2 : An accessory fuse panel may be connected at this location. The combined current draw of the primary
station and secondary station MUST NOT exceed 35 amperes.
NOTE 3 : Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection andslide rubber sleeve over connection.
A - Secondary Station
1 - Start - Stop Panel2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter
B - Primary Station
1 - Ignition Switch2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter6 - To Engine7 - 20 Ampere Fuse
Index
7/28/2019 Merc Elecs
23/32
INJECTORS 2, 3, 5, 8
INJECTORS 1, 4, 6, 7
467 DK BLU
15A
15A
87a 30 85 86 87
IDLE AIRCONTROL(IAC) VALVE
C
B
A
DUAL ENGINE DATA LINK(MULTIPLE ENGINEAPPLICATION SOME MODELS)
BLK
916 YEL J1-5 MASTER/SLAVE
461 ORN/BLK
TO ECM/BATFUSE15A
440 ORN
441 BLU/WHT442 BLU/BLK
443 GRN/WHT
444 GRN/BLK
10A
MALFUNCTION INDICATOR LAM
DK GRN
DLC
R
BLK
PORT FUEL JUMPER ISCONNECTED ONLY IN MPI
APPLICATIONS
SOME MODELSWILL HAVE THEDUAL ENGINEDATA LINKMOVED TO THEDLC
916 YELBLK
WIRING DIAGRAMS - 4F-290-823224--2 796
Multi-Port Injection Wiring Diagram (Chart 1 Of 4)
Index
7/28/2019 Merc Elecs
24/32
(TP)
ENGINE COOLANTTEMPERATURE
(ECT) ENGINE COOL-ANTTEMPERATURE(ECT) SENSORSIGNAL
INTAKE AIRTEMPERATURE
(IAT)
INTAKE AIR TEMPERATURE(IAT) SENSOR SIGNAL
(THIS SENSOR IS NOT ON5.7L / 350 CID ENGINES)
A
B
C
4F-22 - WIRING DIAGRAMS 90-823224--2 796
Multi-Port Injection Wiring Diagram (Chart 2 Of 4)
Index
7/28/2019 Merc Elecs
25/32
EST MODULE
ELECTRONIC SPARK TIMING (EST)
DIST. REFERENCE HIGH
B A
BYPASS
DIST. REFERENCE LOW
TO BUZZER
TO IGN
TO AUDIOWARNINGSWITCHES
TO TACH
TAN/BLU
BLU/TAN
PUR
GRY
3 PNK
121TAN
121
WHT
931BRN
COOLANT OVERTEMP(TO BUZZER)
LOW OIL PRESSURE/LOWI/O FLUID (TO BUZZER)
J1-6 TO LOW OIL PRESSURE ANDGEAR LUBE SWITCHES ORTRANS. TEMPERATURE
D
C
B
A
IGNITION CONTROL
IC MODULE
86
430 PUR/WHT
BRN
WIRING DIAGRAMS - 4F-290-823224--2 796
Multi-Port Injection Wiring Diagram (Chart 3 Of 4)
Index
7/28/2019 Merc Elecs
26/32
86
85
87
ECM BAT FUSE/DLC 15A
TO IGN COIL TERM B
TO FUEL PUMP RELAY FUSE 15A
TO INJECTORS
10A
B
A
BLK
LANYARD STOPSWITCH CIRCUIT(OPTIONAL)
SYSTEM/IGNITION RELAY
TO DLC CONNECTOR
KNOCKSENSOR (KS)MODULE
KNOCKSENSOR (KS)
439 PNK/BLK
CONNECTOR NOT PRESENTON SOME MULTI-PORT MODELS
4F-24 - WIRING DIAGRAMS 90-823224--2 796
Multi-Port Injection Wiring Diagram (Chart 4 Of 4)
Index
7/28/2019 Merc Elecs
27/32
467 DK BLU
15A
15A
87a 30 85 86 87
IDLE AIRCONTROL(IAC) VALVE
C
B
A
DUAL ENGINE DATA LINK(MULTIPLE ENGINEAPPLICATION SOME MODELS)
BLK
916 YEL J1-5 MASTER/SLAVE
461 ORN/BLK
TO ECM/BATFUSE15A
440 ORN
441 BLU/WHT442 BLU/BLK
443 GRN/WHT
444 GRN/BLK
10A
MALFUNCTION INDICATOR LAM
DK GRN
DLC
R
BLK
SOME MODELSWILL HAVE THEDUAL ENGINEDATA LINKMOVED TO THEDLC
INJECTOR
INJECTOR
916 YELBLK
WIRING DIAGRAMS - 4F-290-823224--2 796
Throttle Body Injection Wiring Diagram (Chart 1 Of 4)
Index
7/28/2019 Merc Elecs
28/32
(TP)
ENGINE COOL-ANTTEMPERATURE(ECT)
ENGINE COOLANTTEMPERATURE (ECT)SENSOR SIGNAL
A
B
C
4F-26 - WIRING DIAGRAMS 90-823224--2 796
Throttle Body Injection Wiring Diagram (Chart 2 Of 4)
Index
7/28/2019 Merc Elecs
29/32
EST MODULE
ELECTRONIC SPARK TIMING (EST)
DIST. REFERENCE HIGH
B A
BYPASS
DIST. REFERENCE LOW
TO BUZZER
TO IGN
TO AUDIOWARNINGSWITCHES
TO TACH
TAN/BLU
BLU/TAN
PUR
GRY
3 PNK
121TAN
121
WHT
931BRN
COOLANT OVER-TEMP (TO BUZZER)
LOW OIL PRESSURE/LOWI/O FLUID (TO BUZZER)
J1-6 TO LOW OIL PRESSURE ANDGEAR LUBE SWITCHES ORTRANS. TEMPERATURE
D
C
B
A
IGNITION CONTROL
IC MODULE
86
430 PUR/WHT
BRN
WIRING DIAGRAMS - 4F-290-823224--2 796
Throttle Body Injection Wiring Diagram (Chart 3 Of 4)
Index
7/28/2019 Merc Elecs
30/32
86
85
87
ECM BAT FUSE/DLC 15A
TO IGN COIL TERM B
TO FUEL PUMP RELAY FUSE 15A
TO INJECTORS
10A
B
A
BLK
LANYARD STOPSWITCH CIRCUIT(OPTIONAL)
SYSTEM/IGNITION RELAY
TO DLC CONNECTOR
KNOCKSENSOR (KS)MODULE
KNOCKSENSOR (KS)
439 PNK/BLK
CONNECTOR NOT PRESENTON SOME EFI MODELS
4F-28 - WIRING DIAGRAMS 90-823224--2 796
Throttle Body Injection Wiring Diagram (Chart 4 Of 4)
Index
7/28/2019 Merc Elecs
31/32
THIS PAGE IS INTENTIONALLY BLANK TOALLOW FOR CORRECTIONS OR ADDITIONS
AT A LATER DATE
WIRING DIAGRAMS - 4F-290-823224--2 796
Index
7/28/2019 Merc Elecs
32/32
THIS PAGE IS INTENTIONALLY BLANK TOALLOW FOR CORRECTIONS OR ADDITIONS
AT A LATER DATE