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how hard is it to install a tach on a 1992 150 with the 4.9. anyone done it? are there ones that work better than others. finally...... how do you install a tach
Aftermarket tach's are generally pretty easy to install. There is a hot wire and a ground. Then there is a wire that runs the internal light to illuminate the gauge at night and lastly there is a wire that runs off the negative terminal on the coil.
So the "hot" wire goes to a switched 12v power source. the "Ground" wire goes to ground. The "light" wire goes to a 12v source that illuminates when you turn on your headlights and the last wire goes to the negative terminal on the coil.
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