WHEN I TURN MY IGNITION ON, THE NEEDLE DOES RISE AND THEN FALL DOWN TO ZERO SO I ASUME I HAVE POWER TO THE GUAGE<br />WHEN ENGINE RUNNING THERE IS NO READING FROM THE TACH<br />WHERE SHOULD I START TO LOOK . ALL WIRES SEEM TO BE TIGHT FROM THE COIL<br />I HAVE A MERC OUTBOARD 135 BLACK MAX 1987
