Mercury Optimax Tachometer Wiring Diagram

I want to connect a tachometer to my 1974 mercury outboard. it was Wiring mercury outboard hp diagram switch harness boat mariner trim solenoid starter 1971 maxrules merc tachometer diagrams motor ignition schematic

I want to connect a tachometer to my 1974 mercury outboard. It was

I want to connect a tachometer to my 1974 mercury outboard. It was

I want to connect a tachometer to my 1974 mercury outboard. It was

I want to connect a tachometer to my 1974 mercury outboard. It was