106
SYSTEM ANALYSIS
GROUND CIRCUITS
GROUND CIRCUITS
All ground circuits are essential to optimum out-
board performance. Make certain all ground con-
nections are clean and tight. Refer to wiring
diagrams to identify specific wiring details.
Test Procedure
Disconnect the battery cables at the battery.
Use an ohmmeter to check grounds at the appro-
priate pin locations of the
EMM
. Calibrate the
ohmmeter on the “high” ohms scale.
Connect the ohmmeter red lead to the ground
wire and the black meter lead main harness
ground. Resistance readings for all ground circuits
should be 0
Ω
.
Main engine harness grounds from solenoid
ground terminal screw to:
•
Injector circuits: check continuity to terminal
pins 14, 20, and 21 of the
EMM
J1-B connector.
•
Ignition circuit: check continuity to terminal pin
16 of the
EMM
J1-B connector.
•
Power supply: check continuity to terminal pins
6, 7, and 8 of
EMM
J2 connector.
•
Starter solenoid: check continuity at terminal B.
•
Trim and Tilt module: check connection at main
ground terminal (solenoid mounting screw).
Ignition grounds on lower coil mounting screw to:
•
EMM
ignition circuits: check continuity to termi-
nals pins 11, 17, and 24 of the
EMM
J1-B con-
nector.
FUSE
The engine harness 12 V (B+) circuit is protected
by one automotive style 10 amp minifuse. The
fuse is positioned in the flywheel cover on the port
side of powerhead, next to the starter assembly.
1.
Solenoid screw
2.
Coil screw
002179
1.
Fuse
002428
2
1
1
Summary of Contents for E-tec 75 HP
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Page 233: ...233 POWERHEAD POWERHEAD VIEWS 10 POWERHEAD VIEWS Port Short Block Starboard Short Block ...
Page 234: ...234 POWERHEAD POWERHEAD VIEWS Port Dressed Powerhead Starboard Dressed Powerhead ...
Page 235: ...235 POWERHEAD POWERHEAD VIEWS 10 Front ...
Page 236: ...236 POWERHEAD POWERHEAD VIEWS Rear ...
Page 237: ...237 POWERHEAD POWERHEAD VIEWS 10 Top ...
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