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Author Topic:   Adding a voltage regulator
gcarlil posted 04-05-2008 12:41 PM ET (US)   Profile for gcarlil   Send Email to gcarlil  
I'm running a 1978 Mercury 90hp. inline six on my 17',distributer ignition. I'm getting 17-18 volts to the battery. I want to add a GPS/fishfinder this spring. How do I bring down the voltage?
Thanks,George
deepwater posted 04-05-2008 09:56 PM ET (US)     Profile for deepwater  Send Email to deepwater     
that much going in could damage your battery,, in any case the output will still be 12v
minitauk85 posted 04-06-2008 05:33 AM ET (US)     Profile for minitauk85  Send Email to minitauk85     
George- I went through a similar situation with my 1987 70 hp Johnson. This link I provided seems more specific to Mercury, but it includes a link to a thread I started way back with the same over charging situation in my Johnson. My battery was boiling over and swelling, burned out my Humminbird too! In the end Gwinnett Marine fixed the problem for a decent price. Hope this helps-k

http://continuouswave.com/ubb/Forum6/HTML/001143.html

gcarlil posted 04-07-2008 07:05 PM ET (US)     Profile for gcarlil  Send Email to gcarlil     
Kevin, Thanks I stopped by Gwinnett Marine today, they were very helpful,parts guy checked several books was not sure he could help but said he would do additional research.He suggested I do the same as electrical parts were not returnable.The hunt continues.
George
L H G posted 04-07-2008 08:28 PM ET (US)     Profile for L H G    
Mercury used to offer a voltage regulator accessory for the in-line 6's. It's simple to install. I installed them on my own in-lines. Cost about $80 each if I remember correctly. Try your Merc dealer.

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