Faria

Faria Chesapeake Black SS 4" Tachometer w/Hourmeter - 6,000 RPM (Gas - Inboard) - 33732

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Electronic tachometers work by counting pulses generated by the ignition system, alternator, tach signal generator or magnetic pickup sender. The tach is hooked up to +12vDC, Ground. By selecting the right tach and setting the switch on the back to the correct position you let the tachometer know how many pulses are sent per each engine revolution