Wiring Color Codes for Mercury & U.S. Mariner Outboard Motors.

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WIRING COLOR CODES

Here is a listing of common color codes for Mercury and Mariner (US-made) outboard motors.
These codes apply to later-model motors (approximately early 80's to present)

MERCURY/MARINER COMMON WIRING COLOR CODES
WIRE COLOR(S)	FUNCTION	COLOR SAMPLE
BLACK	GROUND
BROWN	Reference Electrode MerCathode System
ORANGE	Anode Electrode MerCathode System
LIGHT BLUE / WHITE STRIPE	Trim UP Switch
LIGHT GREEN / WHITE STRIPE	Trim DOWN Switch
BROWN/WHITE STRIPE	Trim Sender to Trim Gauge
PURPLE / WHITE STRIPE	Trim "Trailer" Switch
GRAY	Tachometer Signal
BLACK / YELLOW STRIPE	Shorting or Stop Circuit
PINK	Fuel Sender to Gauge
RED	Un-fused Wire from Battery
RED / PURPLE STRIPE	Protected (Fused) Wire from Battery and/or Protected (12 Volt +) to Trim Panel Control
PURPLE	Ignition (Switch) to 12 Volt Positive
TAN	Temperature Switch to Warning Horn and/or Temperature Sender to Temperature Gauge
TAN / /BLUE STRIPE	Alternate Color Temperature Switch to Warning Horn
YELLOW	Starter Solenoid to Starter Motor and/or Starter to Regulator (Charging Circuit)
YELLOW / RED STRIPE	Start Switch to Start Solenoid to Neutral Start Switch
YELLOW / BLACK STRIPE	Choke (Enrichener System)
GREEN / VARIOUS STRIPE	Switch Box to Coil - Striped and Numbered
WHITE / BLACK STRIPE	Bias Circuit (Switch Boxes)

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