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intermittent power outages

Old 01-15-2003, 09:35 AM
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Default intermittent power outages

OK, one final -- and incredibly annoying -- kink to work out on recently bought 1999 scout 185 sf, w/ 2001 yamy 115-stroke.

have had for about 5 weeks, put on about 25-30 hours on engine.

the power goes off intermittently, and for a few seconds to several seconds.

this happens one either battery #1 or #2, w/ engine running, engine not running, accessories all off, all on.....some accessories on, some off, etc. in sum, cycled thru all the permutations.

some days i put in 60-70 miles, and everything's PERFECT. another 60 mile, or 3-mile outing, and problem arises. i really got annoyed monday nite,when damn lites would go on and off periodicially, in a very apparent display of the problem.

of course, the service center that installed my 2nd battery and GPS/sounder (garmin 188c) can't find anything wrong (they're a former longtime scout and contender dealer, but dumped scout for grady white a couple months ago).

everyone feel free to offer suggestions on isolating the problem. the good news is it's a small boat, with only about .75 miles of wire. the bad news is i'm not a very good DIYer (i do remember ohm's law from my high school days, tho).

thanks, gang.
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Old 01-15-2003, 09:51 AM
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Default intermittent power outages

Step 1: Look at your batterys and see if some dam fool attached your power supply wire to one of them. If they did remove it (which should be easy because its about ready to fall off anyway) and move it to the output lug on the back of your battery switch.

Step 1A: If your power supply wire is already attached at the battery switch remove the switch from whereever its screwed down and tighten up the nut on the back that holds the wires on, before they fall off.

When you've done one of the two things above report back.

Thom

"For every complex question, there's a simple answer. And it's wrong."
(--H. L. Mencken)
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Old 01-15-2003, 10:45 AM
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Default intermittent power outages

Step 2 is simpler, and I may as well give it to you now. Starting at the batterys and moving up the line all the way to your console (at the breaker or fuse panel). Grab every wire about a foot away from every crimp connector and give each one of them a good yank. One of them is going to come apart in your hands. That one may or may not be the problem, fix it and keep on going, there will be more just like it.

Thom

"For every complex question, there's a simple answer. And it's wrong."
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Old 01-15-2003, 10:58 AM
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Default intermittent power outages

I have Perko bat swithes and recently had occassion to check the wires on one of the switches. There are 4 mounting screws that hold the Bat switches to the transom. When I re-tightened the 4 screws and selected Bat 1 on the switch, zilch output. Also no output from Bat 2 and Both. Lossened the mounting screws slightly and voila, all was OK.

If the Bat switch is not mounted on a perfectly flat surface, tightening down the 4 screws can distort the contact slider and no contact is made with the individual battery connections. When I happened to loosen the upper left mounting screw, I noticed that I had intermittent contact with Bat 1 and loosening the screw further, full contact. I put several shim washers on the back side of the Bat switch, re-tightened the upper left screw fully and all was OK.

Just a wild-ass-guess, but that could be the problem.
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Old 01-16-2003, 07:21 AM
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Default intermittent power outages

thnks! i'll give your advice a try next couple of days and will report back.
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Old 01-17-2003, 01:42 PM
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Default intermittent power outages

ok, never could get the thing to black out on land, but did tighten stuff, etc. will do a trial run sunday or monday, to see if everything OK.

here are some pix of the electric.







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Old 01-17-2003, 01:46 PM
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oops.



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Old 01-17-2003, 03:45 PM
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Default intermittent power outages

I'm glad you posted those pictures. Here is the thing that really jumped out at me. Get rid of those Wing Nuts on the batterys.

Thom

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Old 01-17-2003, 03:53 PM
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Default intermittent power outages

I see 3 ground wires off of, I presume, Bat 1. One from Bat 2, One from engine ground, and the third goes to system ground at the console. Take them all off, clean them up with a wire brush, put some teflon grease on them and re-assemble. Pull hard on each of the terminals and be sure they are tight. Your problem could be in the ground system and that is a good place to start. Also check the termination of the ground at the console.

If the problem does happen again, take a look at your voltmeter and see that you have proper voltage at the engine. The voltmeter + and ground connections come from the engine cabling. With the engine running, you should read about 13 to 15 volts which is normal. If the voltage goes higher, then the Battery is also disconnecting from the engine and the equivalent of OFF on the Bat switch (not good). If the voltage reading remains the same, then at least the battery to engine connection is OK and the problem is the console wire connection or its' terminal at the Bat Switch.
Because the problem started after the installation of the second battery, that Bat Switch and the connections have to be the prime suspect.
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Old 01-17-2003, 05:06 PM
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Default intermittent power outages

thanks, gang. i do plan on replacing the evil wing nuts. one of the neg wires on batt #1 is the direct-connect bilge, fyi.

generally, when everything working fine, i get 14 volts, per yamy gauge, and GPS.

i'll keep yu posted.
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Old 01-17-2003, 07:13 PM
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Default intermittent power outages

Look at all of those spade connectors attached to the switches, some appear to daisy chain to others. Check all of those and make sure they are tight and not corroded, especially the first one which supplies the power to all the rest. I don't like spade connectors, they're easy on but easy off.

23 Regulator (2002) F225
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Old 01-17-2003, 07:30 PM
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Default intermittent power outages

I've never had a problem with wing nuts. Crank them down and tap with a hammer and they're good all season. What do you prefer?

quote:Originally posted by Thom:
I'm glad you posted those pictures. Here is the thing that really jumped out at me. Get rid of those Wing Nuts on the batterys.

Thom

"For every complex question, there's a simple answer. And it's wrong."
(--H. L. Mencken)

23 Regulator (2002) F225
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Old 01-17-2003, 08:29 PM
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Default intermittent power outages

You only have to fry one voltage regulator to convince yourself. Or listen to others that have done it. Use lock washers with SS nuts instead.

Ed
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Old 01-26-2003, 06:01 PM
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Default intermittent power outages

ok, everything appears to be fine now, after some field testing.

re-tightened batt switch leads, checked under console for anything lose (what a rat's nest) -- and, yes, swapped SS nuts and lockwashers for my wing nuts.

thanks for everyone's help!
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