I have a 1983 Ski Nautique, 351 Ford engine, with a three wire alternator.
I want to convert the marine electrical to a one wire alternator but not quite sure how that is accomplished. On the old alternator there was a green “Field” Wire, a brown “AUX” wire and an orange “Act Output” wire plus a ground connection to the alternator case. The green, brown and wires went to the external voltage regulator.
My thinking is I disconnect these wires from the old alternator and the external voltage regulator and
disconnect the orange completely and run a new cable from the boat battery to the “BAT” post on the new alternator.
Is this correct?
One question I have with this is won’t there be a constant drain on the battery with the alternator hooked directly to the battery?
Thanks in advance for the help.
A single wire alternator is simple. They are self exciting and start charging as soon as the alternator is turning. When they stop turning, they stop charging. There is not a constant drain when the boat engine is off.
Remove all of the extra external regulator wires. You can either run a new alternator output wire or just use the orange in your existing engine wiring.