On Nov 12, 3:12 pm, wrote:
I have an older Honda 10 hp outboard that has a charging circuit. The
small boat that it is on has a bilge pump and small AGM battery. The
outboard's charging circuit puts out over 15 volts. Can I put a diode
in the circuit to reduce the voltage? If so what kind of diode?

thanks

You could put a galvanic isolator in line with the alternator
output. This will drop the voltage to about 13.6 and can handle the
current.

Eric