75hp evinrude putting out 16 volts

Model is e75tlcrd. 1984 75hp. The voltage at plain batter is 12.6 or so. Under throttle the vtage goes up to about 16 v or so. Is this normal? Do these motors have voltage regulators?

Re: 75hp evinrude putting out 16 volts

I don't know about your model, but I had a 1976 70 HP that was unregulated. Voltage could get upwards of 17 V if on an extended WOT run. My solution was to have high-drain devices running while going full-bore. Usually having my phone charging and the GPS powering up via power ports coupled with a humongous battery kept the voltage under 16 V.

Rgds

E

Re: 75hp evinrude putting out 16 volts

Gotcha. Thanks for the reply bud. I'm pretty sure there is no regulator on this guy. I just bought a $1300 GPS combo unit and do NOT want to fry it. Do you think that I should just get a separate battery for the high dollar electronics?

Re: 75hp evinrude putting out 16 volts

16 volts or higher is normal on those systems as they are unregulated. Like you said, a seperate battery for your electronics and then charge it when you get home.

Re: 75hp evinrude putting out 16 volts

Cool thanks Bob as always! How you doin bud?

Re: 75hp evinrude putting out 16 volts

Doing okay. Thanks.

Re: 75hp evinrude putting out 16 volts

Glad to hear it. Thanks for all your help with the shift shaft seal. I left the motor tilted all night and it didn't leak a drop!

Re: 75hp evinrude putting out 16 volts

You're more than welcome.

Re: 75hp evinrude putting out 16 volts

if your electronics don't draw to many amps you can get **** flat 12volts from a couple of Radio Shack 12 volts regulator chips hooked up in paralell* to increase available amps (each chip will give 1 amp of current ) . My humminbird Paramount WIDE fish finder would shut down on high voltage peaks from my Classic 45 merc.

*(2 same pins to ground...2 same pins to Batt+ ....and 2 same pins Flat +12V) mounted on a piece of aluminum with heat sink
silicone)

The small regulators (2) were hooked up in parallel and no more shut downs

The chips can handle anything from +12 to +35 V DC and put out a flat 12V (1 amp each)

Hook up the BATT + via an accessory switch to turn off the regulators when not in use.