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How to convert from 6 to 12V??

Old Marine Engine » Gray Marine Gas Engines - 4, 6, and 8 cylinder » How to convert from 6 to 12V?? « Previous Next »

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Hakan Pettersson
Member
Username: hugger69

Post Number: 4
Registered: 10-2010
Posted on Tuesday, October 12, 2010 - 12:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I know from reading here that the starter is not the big problem!

As I see it the issue is how to you get a 12V generator with the shaft for the water pump??

To remake the 6V generator seems to be very expensive, at least here in Sweden! I would cost over $ 900 !!
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Jim Staib
Senior Member
Username: drrot

Post Number: 66
Registered: 09-2008


Posted on Wednesday, October 13, 2010 - 07:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I would check another source. $900 is 4 times the cost here in the US.
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Hakan Pettersson
Member
Username: hugger69

Post Number: 5
Registered: 10-2010
Posted on Wednesday, October 13, 2010 - 04:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

OK, but you don¨t have any tip regarding any exchange generator?
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kim hartshorn
Member
Username: kimhartshorn

Post Number: 13
Registered: 08-2010
Posted on Wednesday, October 13, 2010 - 04:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Gray Marine used 12V generators in the 'shaft driven water pump' configuration after 1954 or so. You should be able to find used ones online. You would still probably want to have it rebuilt however.
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thomas johnson
Member
Username: capt_tom

Post Number: 6
Registered: 04-2006
Posted on Wednesday, October 13, 2010 - 05:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

my 1956 is shaft driven water pump through the grn. and is 6 volt, so when you find all the ans. along with changing from pos. grd to a nrg. grd. let me know. the last est. I got here in Fl. was around 1000 dollors.
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Hakan Pettersson
Member
Username: hugger69

Post Number: 6
Registered: 10-2010
Posted on Thursday, October 14, 2010 - 08:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Is my 6V generator a postive ground system???
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miro forest
Senior Member
Username: miro

Post Number: 498
Registered: 11-2001


Posted on Friday, October 15, 2010 - 09:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have to tell you from past experience, that many people who convert from 6V to 12V regret that so-called upgrade.
For example re-winding the 6V generator to make 12V means that you'll only get half of the output current compared to the 6V output because the generators are rated on output power ( i.e. Volts x Amps)

But you are correct, using 12V on a 6 V starter is OK.

I've been using a configuration of two 6V batteries so that I get 12V to the starter yet have everything else running on 6V. That way the engine stays original but it is easier to start.

I posted that configuration a couple of years ago - I'll see if I can get the link for you.

miro
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miro forest
Senior Member
Username: miro

Post Number: 499
Registered: 11-2001


Posted on Friday, October 15, 2010 - 09:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Here's the link

http://www.oldmarineengine.com/technical/miro_12volt.pdf
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Hakan Pettersson
Member
Username: hugger69

Post Number: 7
Registered: 10-2010
Posted on Saturday, October 16, 2010 - 04:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Thanx Miro for your answer, I ´ll check that link! :-)
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Hakan Pettersson
Member
Username: hugger69

Post Number: 8
Registered: 10-2010
Posted on Saturday, October 16, 2010 - 04:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

...but another quest popped up, how to you get 6V light bulbs and a bilge pump??
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Jim Staib
Senior Member
Username: drrot

Post Number: 67
Registered: 09-2008


Posted on Monday, October 18, 2010 - 07:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

6V light bulbs can be had from antique car sources. The only place I found that makes 6V bilge pumps is Lovett. They are hard to find. www.classicboatconnection.com usually has them
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Nelson Mccall
Member
Username: sea_scout

Post Number: 5
Registered: 09-2010
Posted on Sunday, January 23, 2011 - 09:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Just had an AC 4111 (1934 Gray 4 cycl) rebuilt by "Indian Frank" all Total rebuild, new everything. All I had was an emplty case. It is a work of art. Worth contacting Indianfrank@yahoo.com
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Hakan Pettersson
Member
Username: hugger69

Post Number: 15
Registered: 10-2010
Posted on Monday, January 24, 2011 - 02:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Great Nelson!
Cost?
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Nelson Mccall
Member
Username: sea_scout

Post Number: 6
Registered: 09-2010
Posted on Monday, January 24, 2011 - 11:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hakan, Total cost was just alittle over $500, but remember all I had was a rusty case. No end plates or internal parts. Frank made everything new. I had spent months looking for a replacement or someone who could rebuild it. Got alot of " I will try anf find parts" with no promises and $400 ESTIMATES. Frank said: No problem, I can make the parts. I am extremely happy with the results.
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Hakan Pettersson
Member
Username: hugger69

Post Number: 16
Registered: 10-2010
Posted on Tuesday, January 25, 2011 - 03:29 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Interesting!
I wonder how much it would cost with freight from Sweden to US and back?
...or is it possible to know what he actually did do get it working??
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Jim Staib
Senior Member
Username: drrot

Post Number: 71
Registered: 09-2008


Posted on Tuesday, January 25, 2011 - 07:06 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hakan,
What is the part number on your generator? Or can you post a photo.
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Hakan Pettersson
Member
Username: hugger69

Post Number: 17
Registered: 10-2010
Posted on Tuesday, January 25, 2011 - 08:07 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I´ll we do that tonight!
How do I post a pic?? Here is a link for my lates engine! Yes, I now have 2 Gray Marine Phantom Four-75!!
http://i64.photobucket.com/albums/h193/hugger69/Boghammar/GrayII006.jpg
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Jim Staib
Senior Member
Username: drrot

Post Number: 72
Registered: 09-2008


Posted on Tuesday, January 25, 2011 - 08:21 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Might be easiest to get the part number off the generator. I'll look to see if I can find one here cheaper than shipping yours from Sweden.
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Hakan Pettersson
Member
Username: hugger69

Post Number: 18
Registered: 10-2010
Posted on Tuesday, January 25, 2011 - 08:55 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Yes, that good be an idea to try! :-)
I´ll get back later tonight!
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Hakan Pettersson
Member
Username: hugger69

Post Number: 19
Registered: 10-2010
Posted on Tuesday, January 25, 2011 - 03:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I just checked the generator and this are the figures:
Auto-Lite
GFA 4802-2 11F

The starter has this numbers on it:
Auto-Lite
MZ 4045 5F

Can you tell anything from this?
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Jim Staib
Senior Member
Username: drrot

Post Number: 73
Registered: 09-2008


Posted on Tuesday, January 25, 2011 - 04:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hakan,
I found one. Give me a couple days and I will run it to the Electric shop a couple towns over and see if they can convert it.
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Hakan Pettersson
Member
Username: hugger69

Post Number: 20
Registered: 10-2010
Posted on Thursday, January 27, 2011 - 02:28 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Wow Jim, you´re fast! :-)
I´ll hope it will work out right then!

I´ve parts for my 69 Camaro that will be shipped to my town in Sweden from California Shipping, Stanton! Could that be easier for you in that case to ship it to Stanton?
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Jim Staib
Senior Member
Username: drrot

Post Number: 74
Registered: 09-2008


Posted on Saturday, January 29, 2011 - 08:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hakan,
I dropped it off Friday. They will open it up and let me know if the parts can be had next week.
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Hakan Pettersson
Member
Username: hugger69

Post Number: 21
Registered: 10-2010
Posted on Saturday, January 29, 2011 - 04:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Wow, great! Did you get a price indication?
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Hakan Pettersson
Member
Username: hugger69

Post Number: 24
Registered: 10-2010
Posted on Friday, February 04, 2011 - 04:45 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Jim, have you heard anything moore regarding the generator?
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Jim Staib
Senior Member
Username: drrot

Post Number: 75
Registered: 09-2008


Posted on Friday, February 04, 2011 - 05:06 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hakan,
I'll check today. We had 2 feet of snow this week and it pretty much stopped everything.
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Hakan Pettersson
Member
Username: hugger69

Post Number: 25
Registered: 10-2010
Posted on Friday, February 04, 2011 - 05:27 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Wow, that´s a lot of snow for you!
For us that´s like normal!
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Jim Staib
Senior Member
Username: drrot

Post Number: 76
Registered: 09-2008


Posted on Friday, February 04, 2011 - 09:40 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hakan,
I can get it done. Sent you an email with details.
JIM
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Hakan Pettersson
Member
Username: hugger69

Post Number: 26
Registered: 10-2010
Posted on Saturday, February 05, 2011 - 01:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Thanx! I just sent you an answer!

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