1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 81Get this manual

Tachometer (With Adjustable Dial) and Trim Indicator Gauge Wiring Diagram
BLK BRN GRY PUR TAN WHT
BATT GND

BLACK BROWN GRAY PURPLE TAN WHITE

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives