Quote:
Originally Posted by SailorChlud
. . . I tested this on the water by switching the batteries back from combined to run position while the motor was running, and though the motor remained running, lost my tach readout, indicating that the start battery was disconnected in that position, and maybe not feeding the ignition/motor circuit. . .
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Be careful switching batteries with the motor running, as that can blow the diodes in the alternator unless your battery switch is specifically designed for that! I think your tach signal comes from the alternator, so that might be why your tach quit working!