90 Hp Mercury Outboard Tach Wiring

I want to connect a tachometer to my 1974 mercury outboard. it was Outboard ignition thunderbolt wiringdiagram Yamaha tachometer wiring help

65 Hp Mercury Outboard Motor Wiring Diagram - Wiring Diagram

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

65 Hp Mercury Outboard Motor Wiring Diagram - Wiring Diagram

Yamaha Tachometer wiring help - The Hull Truth - Boating and Fishing Forum