Common problem.

Run the lights, radio etc etc

If you can get a 14v Zener diode with a good current rating , you can clamp
it too.

-W

"Grumpy" wrote in message
u...
Hi Guys

I have the above old motor. Works well. I have sounders etc on the boat
and
my concern is that the motor does not have any regulation from it's charge
circuit. I have seen it fluctuate to 16V at times.

I can filter out the line noise but need some ideas that I can use to get
my
instrument panel to 12-13V .

Any ideas please

Many thanks
Alan