Charging Coil Voltage

Installation of instruments and electrics in the Cape Cutter 19

Charging Coil Voltage

Postby Julian Porter » Wed Oct 02, 2019 7:23 pm

I have a Mariner outboard with a plug which I assume is from a regulator connected to the charging coil. I measured the voltage as only about 7 Volts. I was expecting something more like 14 Volts like you would get from a car battery charger. Is there something wrong with the coil or am I misunderstanding?
Julian Porter
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Re: Charging Coil Voltage

Postby Dennis » Fri Nov 01, 2019 6:28 pm

Hello Julian

I suggest that you try connecting the charging leads to a battery and then measure the volts with the engine at tickover and at full revs. You should get something like 12.6 volts at tickover rising to 14-15 volts at full revs depending on the state of your battery.

I have a Honda 5 with charging coil, it is a very rudimentary system there is no regulator. Heaven only knows what the voltage reading would be in an "open circuit" like you are suggesting.


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