Over-voltage

Engines, Shafts, Steering, Struts, Rudders, etc.
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balthaus
Aluminum Star
Posts: 163
Joined: Thu Sep 11, 2014 7:27 pm
Location: Southern Indiana / Louisville

Over-voltage

Post by balthaus »

So we took our BigM out on the river Sunday!
After new ..plugs...coils...resistors.... Motors ran great!
No more motors stalling once trannies engaged....perfect.
Cruised up to 18 mile island at around 1800-2000 rpm.
I got warning signals from vhf regarding over voltage. Checked gauges and was seeing
15.5 ish volts on both.
Not sure what is going on ....the only thing done was the stuff mentioned prior....well both vhf radios and antennae are new as of this cruise.
1984 32' Sedan FB
Twin Chrysler 360's
1.52:1 Velvet Drives
Raw water cooled
Ohio River
TinLizzy
Royal Aluminum Star
Posts: 266
Joined: Mon Jan 19, 2015 11:07 pm
Location: Lake Superior-Michigan's U.P.

Re: Over-voltage

Post by TinLizzy »

If you have the original Prestolite alternators, the voltage regulator is probably taking a dump.
Rodney
1975 28 Express-Twin 350 Chevy's, SOLD
1990 32 Express--Twin Mercruiser 454 with Bravo I outdrives
Portage Canal Waterway-Upper Peninsula,Lake Superior
Fastjeff
Site Admin
Posts: 1522
Joined: Sat Jul 12, 2014 5:06 am
Location: Rock Halll, MD

Re: Over-voltage

Post by Fastjeff »

That's the opposite problem one has with one wire alternators running at that engine speed. I assume you were off plane?

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington
balthaus
Aluminum Star
Posts: 163
Joined: Thu Sep 11, 2014 7:27 pm
Location: Southern Indiana / Louisville

Re: Over-voltage

Post by balthaus »

Fastjeff
Correct I was not on plane but pretty close.
I also found out that they are the original Prestolite alternators and both volt meters respond to the starboard engine.
I have ordered two volt regs
1984 32' Sedan FB
Twin Chrysler 360's
1.52:1 Velvet Drives
Raw water cooled
Ohio River
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