Easy generator question

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NJ-boatbuilder57
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Easy generator question

Postby NJ-boatbuilder57 » Tue Sep 11, 2018 11:57 am

Easy question: The old DC generators used by OMC in the '50s & '60s....are they "Grounded Field" ("B-Circuit") or "Live Field" ("A-Circuit")?

(For all of my electrical & electronics background, I'm a wee bit embarrassed to say that I don't know the difference! :cry: :cry: :cry: )
Last edited by NJ-boatbuilder57 on Wed Sep 12, 2018 4:07 pm, edited 1 time in total.

FrankR
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Re: Easy generator question

Postby FrankR » Tue Sep 11, 2018 12:25 pm

They are "A" circuit, meaning the field is grounded externaly by the voltage regulator.

NJ-boatbuilder57
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Location: New Jersey

Re: Easy generator question

Postby NJ-boatbuilder57 » Tue Sep 11, 2018 12:46 pm

thanks Frank!

Now if I could only hunt down a bracket.....

FrankR
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Re: Easy generator question

Postby FrankR » Tue Sep 11, 2018 1:43 pm

NJ-boatbuilder57 wrote:thanks Frank!

Now if I could only hunt down a bracket.....


Refresh my memory---what motor? I have a couple of them.

NJ-boatbuilder57
Posts: 248
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Location: New Jersey

Re: Easy generator question

Postby NJ-boatbuilder57 » Tue Sep 11, 2018 1:50 pm

Sorry....my vague comment wasn't fair.

The engine is a '57 Golden Javelin. The brackets (left & right) have little "points" on the front of them to engage the cowl mounts. Most cowls don't mount that way, so most brackets don't have the points. Finding a generator bracket with a point is very difficult!

Here's a thread I started from earlier this year...with pictures of what I'm talking about:
viewtopic.php?f=2&t=16473&p=88157&hilit=generator#p88157

NJ-boatbuilder57
Posts: 248
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Location: New Jersey

Re: Easy generator question

Postby NJ-boatbuilder57 » Tue Sep 11, 2018 6:32 pm

....and just this evening, I've confirmed for sure that the bracket part number is 377006. Anyone got one they'd like to part with?

FrankR
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Re: Easy generator question

Postby FrankR » Tue Sep 11, 2018 7:13 pm

Nope, the ones I have don't have the Johnson points

Mas
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Re: Easy generator question

Postby Mas » Wed Sep 12, 2018 8:47 am

Could one be modified by welding on a pointed stud...or are they very different from the evinrude variety?

Mas

NJ-boatbuilder57
Posts: 248
Joined: Fri Aug 25, 2017 10:59 am
Location: New Jersey

Re: Easy generator question

Postby NJ-boatbuilder57 » Wed Sep 12, 2018 9:15 am

I measured it.....the "non-pointy" bracket doesn't lend itself to modification, as the forward face (where the point needs to be) is too far inboard. The 377006 bracket is pretty unique in its dimensions, irrespective of the point...

If anyone has a 377006 that they'd like to part with, please let me know!

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Garry in Tampa
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Re: Easy generator question

Postby Garry in Tampa » Wed Sep 12, 2018 3:58 pm

Of course you could weld up an adaptor for the Johnson mounts. All you would need is a Johnson mount for the dimensions. On the other hand, if you had a Johnson mount, you wouldn't need to make an adaptor . . . :lol:
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