Faria Euro Black 4" Tachometer w/Hourmeter (4000 RPM) (Diesel) (Magnetic Pick-Up) AIS Systems or if you see milky

or if you see milky or lumpy oil

Heavy-duty marine push-button switch included with all models

and over-temperature conditions

Hella quality and performance

Lightweight fiber-reinforced Carbo-Cams® for racing where weight is critical

Faria Euro Black 4" Tachometer w/Hourmeter (4000 RPM) (Diesel) (Magnetic Pick-Up) AIS Systems or if you see milkyEuro Black 4" Tachometer with Hourmeter (4000 RPM) (Diesel) (Magnetic Pick Up) Perimeter lighted Black dial with bold White graphics, Black aluminum bezel, contoured White pointer and flat glass lens. Electronic tachometers work by counting pulses generated by the ingition system, alternator, tach signal generator or magnetic pickup sender. The tach is hooked up to +12VDC, Ground and one of the signal sources listed above. By selecting the right tach