Author Topic: Wiring  (Read 16823 times)

0 Members and 1 Guest are viewing this topic.

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #20 on: February 12, 2013, 10:48:14 AM »
I'm ordering one today.
I'll open up that cocoon and see whats in there.

Rich, you are an invaluable resource to this club. If you can ever drag that beautiful V174 to Red Wing, I owe you a pile of beverages of your choice. Its a long haul, I know. Bring your RC plane too!
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline dorelse

  • Administrator
  • Hero Member
  • *****
  • Posts: 5987
Re: Wiring
« Reply #21 on: February 12, 2013, 10:58:03 AM »
I'm ordering one today.
I'll open up that cocoon and see whats in there.

Rich, you are an invaluable resource to this club. If you can ever drag that beautiful V174 to Red Wing, I owe you a pile of beverages of your choice. Its a long haul, I know. Bring your RC plane too!

He has a standing offer to use my boat at Red Wing, he basically consulted on it for free, and it wouldn't be on the water without him...he just needs to get to MN, the registration fee is on me as well.

His willingness to share & help keeps us on the water!
1990 Sierra 1700

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #22 on: February 12, 2013, 10:58:26 AM »
Thanks, one day I may have to make that trip. In the meantime I was trying to come up with this pic - it's a blown-up shot of the 90 amp fuse link connected to my starter, it's the best shot I have.

« Last Edit: February 12, 2013, 11:09:19 AM by Rich_V174SS »
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #23 on: February 12, 2013, 11:09:31 AM »
So what am I missing about the 90 amps? The alternator is charging the battery through this circuit and this fuse is only fusing that, correct? I looked at a chart and something like 2 awg would be required for 90 amps.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #24 on: February 12, 2013, 11:17:18 AM »
You got me on that one!  ;D
Our alternators have a 70 amp output rating, meaning if that much power is required then they are capable of producing it. It doesn't mean they will always be pushing out that much power. It's there for protection incase there's a surge from a direct short to ground where 90 amps can easily be breached. Tilt & trim pumps can draw a lot of power and are usually fused with a 110 amp link. Under normal usage they will not draw that much power but in the event something shorts out the fuse is there to break the circuit to protect everything else.
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #25 on: February 12, 2013, 11:22:27 AM »
Thinking about it more, if there was a short in the alternator itself then your battery is definitely capable of producing more than 100 amps to break that 90 amp fuse, so the protection works both ways.
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline thedeuceman

  • Administrator
  • Hero Member
  • *****
  • Posts: 3356
Re: Wiring
« Reply #26 on: February 12, 2013, 12:07:57 PM »
So what am I missing about the 90 amps? The alternator is charging the battery through this circuit and this fuse is only fusing that, correct? I looked at a chart and something like 2 awg would be required for 90 amps.

First i would like to complement you, Rich on you're ability articulate your vast knowledge on the forum, i have so much trouble putting information i have into words.

as far as the wire gauge thing goes, you are looking at ampacity tables for electrical wiring.
they take into account the wires being installed in a raceway, over a longer distance and a continuous load. the end result is heating of the wire breaking down the insulation over time.
a 10 gauge a few feet long can handle 100A for a short time (say 1 minute) with minimal heating.

the rubber item may be a splice to a fuseable link (common in older cars)
« Last Edit: February 12, 2013, 12:26:49 PM by thedeuceman »
Joe
75 GT150 "SeaDeuced"... Its Back !!
92 16CSS "Attitude Adjustment" is for sale
75 CV-16V8, Project
74 CV-16... its Purple !

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #27 on: February 12, 2013, 12:46:03 PM »
ok I wont worry about.
Thanks guys.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #28 on: February 13, 2013, 10:12:51 AM »
Yesterday I removed the old alternator wire and it was in very poor shape. I also attempted to see what was encased in what can best be described as petrified dinosaur poop. I had to partially crush it in my vise, then chisel away at it. It didn't survive so well so I couldn't read anything on it if there was anything. It must be a fuse. My meter read .1 ohms so it wasn't adding any resistance to the line.
Rich, when we talked about adding that 90 amp fuse (which I ordered) to the starter lug to feed the alternator, that situation was if/when I change the ammeter to a volt meter. Since I am not doing that immediately and will continue to have the large orange wire running up under the dash, replacing the wire to the alternator will need to be fused. Can I use that new one temporarily by putting in line or should I get an inline one that I splice in and if so, should that be 90 amps as well?
I am sure I'll be changing to the volt meter but right now, I want to finish this part. I dislike making a lot of changes at once (which I have already surpassed) without running the motor. It makes trouble shooting that much tougher.
« Last Edit: February 13, 2013, 10:19:01 AM by Rosscoe »
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #29 on: February 13, 2013, 10:28:17 AM »
Quote
Yesterday I removed the old alternator wire and it was in very poor shape. I also attempted to see what was encased in what can best be described as petrified dinosaur poop. I had to partially crush it in my vise, then chisel away at it. It didn't survive so well so I couldn't read anything on it if there was anything. It must be a fuse. My meter read .1 ohms so it wasn't adding any resistance to the line.

According to your OMC wiring diagram it would be a fuse.

Quote
Can I use that new one temporarily by putting in line or should I get an inline one that I splice in and if so, should that be 90 amps as well?

Of course you can use the new fuse, any protection is better than none at all. I don't know where you'll find a 90 amp in-line fuse similar to the one that was on the old wire but the Sierra bolt-on fuse block will be just as good. It doesn't matter if you're changing out the ammeter for a voltmeter at this time, adding the fuse is a safety measure regardless. If you so desire (and as Joe suggested earlier) you can keep the old ammeter if you run a separate (outside your new harness) dedicated large-gauge orange wire from the alternator up to the ammeter and leave all the other wiring alone. Your new fuse can probably be bolted to the output stud of your alternator and then you connect the orange wire to the fuse. Or use a screw and nut and connect it in similar manner as the old busted fuse.
« Last Edit: February 13, 2013, 10:33:44 AM by Rich_V174SS »
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #30 on: February 13, 2013, 10:45:20 AM »
Yes, bolting it right to the alternator would be clean and yup I'll bypass the plug and continue the orange wire up front as is. I may put some kind of plug there in case I pull the motor before I change to a volt meter.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #31 on: February 13, 2013, 10:49:57 AM »
I would also get some small diameter split-loom and slip it around the orange wire, especially around the engine so it doesn't chafe or melt against the engine block or connected metal bracketry creating a short circuit. I did that with my alternator wire as well to protect it, see the pic indicated with the yellow arrows.
« Last Edit: February 13, 2013, 11:21:32 AM by Rich_V174SS »
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #32 on: February 13, 2013, 11:01:57 AM »
Yup, I did that to almost all the wiring on the engine when I did all my patch work before. I'll be putting it back on all of it again. Safer and looks neater.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #33 on: February 13, 2013, 11:23:50 AM »
Cool, looks like you're on top of things.  ;)
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #34 on: February 13, 2013, 12:12:46 PM »
Very clean and professional. It looks like you could eat off it if necessary.  :D
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #35 on: February 13, 2013, 12:27:33 PM »
Thanks, but I think the camera makes it look good, either that or adds 10 pounds, I forget which.

I just found this on-line and thought you'd find it a good read:

http://www.arcomarine.com/xhtml/Pages%2049-51%20AlternatorTechTips.pdf

« Last Edit: February 13, 2013, 12:39:45 PM by Rich_V174SS »
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #36 on: February 13, 2013, 12:58:18 PM »
I think thats TV cameras.  ;D
I'll check it out. Thanks
I took a couple of pics of the rear of the ammeter. I hate continually adding wires onto gauge terminals so when I added and electric compressor for the horn (which didnt do crap) I added an electric horn and 12v socket for spot lights, cig lighter, I added a small terminal block I got from work. Not sure how much current it can take.
I'll be spending more time under there for sure.
Thats the key switch right under the ammeter.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rosscoe

  • Hero Member
  • *****
  • Posts: 4444
Re: Wiring
« Reply #37 on: February 13, 2013, 01:05:12 PM »
Notice the large white wire on the ammeter. It goes to the plug under there, then changes color or gauge! WTH?
I need to see if that is the small gauge white that WAS on the slave solenoid.

I also labeled all the fuse holders externally so I won't need a magnifying glass if one burns out.
Ross
61 Surflite 1964 90HP Johnson project
67 V163 Bayflite Super Sport  1989 100HP Merc
67 V164 Bayflite 120HP
67 V174 Crestflite Rat Rod
71 V175 Crestflite 350ci -Jet
73 GT 160
84 CVX 17  83 115 Merc
88 CVX-23 350 Mag

Offline Rich_V174SS

  • Hero Member
  • *****
  • Posts: 2074
  • 1967 V174 Crestflite SuperSport Modified
Re: Wiring
« Reply #38 on: February 13, 2013, 01:08:57 PM »
The way I see it is the white and the large orange wire are the same, the red wire is the return to the main starter lug and battery. The added accessories you mentioned shouldn't be a problem regarding current, they're low power items.
1967 V174 Crestflite SuperSport Modified
1987 Mercruiser 190 3.7LX/Alpha One

1970 V176 Swinger
1983 Mercury 115

Offline thedeuceman

  • Administrator
  • Hero Member
  • *****
  • Posts: 3356
Re: Wiring
« Reply #39 on: February 13, 2013, 01:34:59 PM »
that terminal strip is rated for around 10 amps
Joe
75 GT150 "SeaDeuced"... Its Back !!
92 16CSS "Attitude Adjustment" is for sale
75 CV-16V8, Project
74 CV-16... its Purple !