MJ, have you checked out the info at Continuous Wave? This might help:
OMC Outboard Motors
The following color coded wiring is often seen in outboard motors manufactured by OMC. This information was developed by Jim Hebert from factory wiring diagrams. Unfortunately, these diagrams are completely lacking in annotation. The identification of the circuits involved was deduced by the author with the assistance of OMC master mechanic David Zammitt of Lockeman's Boat and Hardware.
A pictorial diagram of the typical OMC ignition switch wiring is available in a separate article. It illustrates the use of these wiring colors.
OMC Under-cowling Wiring
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(Based on V6 c.1992)
RED = Battery positive
RED with VIOLET stripe = Fused battery supply to ignition switch
BLACK = Battery negative
BLACK with YELLOW stripe = KILL Switch (grounded to stop engine)
YELLOW with RED stripe = START (Ignition switch to starter solenoid via safety switch)
VIOLET = Battery voltage in RUN or START from ignition switch
VIOLET with WHITE stripe = PRIMER solenoid
LT BROWN = ALARM (grounded on alarm)
GRAY = TACHOMETER pulses to gauge from Rectifier/Regulator
OMC Stator Coil / Timer Base Wiring
----------------------
YELLOW / YELLOW with GRAY stripe = Battery Charging Coil AC voltage
to Rectifier/Regulator on Assembly
Engine Block
BROWN / BROWN with YELLOW stripe = Charge Coil to Ignition Power Pack
BROWN / BROWN with BLACK stripe = Second Charge Coil to Ignition Power Pack
ORANGE / ORANGE with BLACK stripe = Power Coil to Ignition Power Pack
or OIS Module
Green / Violet / White = Timer Base to Ignition Power Pack
/ Black with White
OMC Power Trim and Tilt
-----------------------
RED = Battery positive
RED with VIOLET stripe = Fused battery supply to remote controls
BLUE = UP supply to MOTOR
BLUE with WHITE stripe = UP RELAY
GREEEN = DOWN supply to MOTOR
GREEN with WHITE stripe = DOWN RELAY
RED with WHITE stripe = Fused battery to remote switches
BLACK with TAN = Trim SENDER isolated ground
WHITE with TAN = Trim SENDER isolated fused battery positive
***The link to a nice color diagram of the ignition circuit can be found here:
http://continuouswave.com/whaler/ref...ionSwitch.html