Evinrude E-Tec 40 HP Service Manual page 103

Start Circuit Operation
The st arter must engag e and tu rn the flywhee l.
The outboard must crank a minimum of 300 RPM
to start.
Starter performance depends on the following:
Proper battery and cable capacity.
•
Clean, tight cable connections.
•
Solenoid activation through the key switch a nd
•
neutral safety switch.
Refer to Predelivery and Installation Guide for
battery, terminal, and cable requirements.
Solenoid Wiring
The positive (B+) battery cable connects to a large
terminal of the starter solenoid. This terminal also
provides the 12 V power supply to the engine har-
ness (red wire) and the 10 A fuse. The red/purple
wire from the fuse holder (10 A) provides 12 V to
terminal "B" of key switch.
The negative (B–) batte ry ca ble co nnects to the
main ground stud on the starter housing.
Engine Wire Harness
Contains the following circuits:
Red/purple output wire from fuse provides 12 V
•
to instrument harness.
Purple wire provides switched 12 V to EMM.
•
Yellow/red wire provides switched 12 V to sole-
•
noid (terminal "A").
Yellow/green wire pro vides g round (NEG) to
•
starter solenoid (terminal "B").
ELECTRICAL AND IGNITION
ELECTRIC START CIRCUIT
Instrument Wire Harness
Contains the following circuits:
Red/purple wire provides 12 V to key switch ter-
•
minal "B".
Purple wire pro vides switch ed 12 V to engin e
•
wire harness.
Yellow/red wire from terminal "S" of key switch
•
provides switched 12 V to solenoid (termina l
"A") (key switch in START position).
Key Switch, ON position
12 V is ap plied to the
switch ON:
Switches 12 V to terminal "A" of key switch and
•
to the purple wires of the wire harnesses.
Provides 12 V input to terminal 28 of EMM J1-B
•
connector. EMM turns ON.
1
B B
M M
M
C C
A
A
S
4 5 6
3 2 1
1. Key switch, ON position – Continuity between ter-
minals "B" and "A"
2. Terminal "B", 12 V (Red/purple)
3. Terminal "A", 12 V (Purple)
accessory circuit. Key
2
B
M
M M
C
A
S S
B
M
C
M
S
A
3
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