Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 124Get this manual

Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 124

WIRING DIAGRAMS
QSI Gauge Wiring Diagrams
Tachometer Wiring Diagram
Tachometer dial on back side of case must be set to position number 4
WIRING DIAGRAM A
Use this wiring diagram when using separate light switch for instrument lighting

- Connect to +12 Volt+12 Volt Light Switch WirePosition Light Bulb to the Switched PositionConnect to NEGATIVE () Ground

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