A4 alternator? - SailNet Community
 1Likes
Reply
 
LinkBack Thread Tools
post #1 of 32 Old 05-04-2010 Thread Starter
Justa
 
Join Date: Feb 2007
Location: Strasburg, Virginia (I need more work near the 'Neck')
Posts: 39
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
A4 alternator?

I need a new alternator for my A4 and after seeing how much they are, I started wondering if any of you all have used a different alternator on your A4?

An AC Delco off of many GM will fit, internal regulator, single wire hook up, and cheap.

Even a marine one for a Mercruiser would work and still cheaper than the one for the A4.

Has anybody else already done this?
seaspot is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 32 Old 05-04-2010
Tartan 27' owner
 
CalebD's Avatar
 
Join Date: Jan 2008
Location: NYC
Posts: 4,753
Thanks: 4
Thanked 107 Times in 99 Posts
Rep Power: 8
 
Is your old alternator really shot? A good alternator rebuild shop should be able to fix your old one if it is just a diode or two that are shot. The problem with a rebuild is that it can cost as much as $250 to have your alternator rebuilt and a new 55 amp alternator from Moyer Marine is only $217.50. The original alternators on the A4 are only 35 amps so a new 55 amp alt. may just be the way to go.
Moyer Marine Atomic 4 Engine Rebuilding and Parts
Or try an AC Delco alt. but you should not need much more then 55 amps of output. The higher the amp rating on an alt. the more power it uses from the engine to generate those amps.
I have priced some 'marine' alternators and I agree that they are very $$$. It usually pays to shop around and compare prices/products.
Good luck whatever you do.

"The cure for anything is salt water~ sweat, tears, or the sea." ~Isak Denesen

Everybody has one:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CalebD is offline  
Quote Quick Reply Share with Facebook
post #3 of 32 Old 05-04-2010
1975 Newport 28
 
jaschrumpf's Avatar
 
Join Date: Jun 2002
Location: Monrovia, MD
Posts: 573
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 14
 
I had my 35A alternator totally rebuilt into a 55A alternator by a local Baltimore shop. It cost less than $100 for the rebuild, so I'd definitely look around and get some prices from a local alternator/starter shop before committing to buying a new one.

S/V Free Spirit

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Monrovia, MD
jaschrumpf is offline  
Quote Quick Reply Share with Facebook
post #4 of 32 Old 05-05-2010
Senior Member
 
MARC2012's Avatar
 
Join Date: Mar 2008
Posts: 594
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 8
 
If yours is shot why not try to repair it yourself.Usually brushes if em,.\.,m
MARC2012 is offline  
Quote Quick Reply Share with Facebook
post #5 of 32 Old 05-05-2010
Senior Member
 
tommays's Avatar
 
Join Date: Sep 2008
Posts: 4,296
Thanks: 1
Thanked 30 Times in 30 Posts
Rep Power: 7
 
What ever you do PLEASE use the marine unit as the brushes are spark shielded to help with BOOM

1970 Cal 29 Sea Fever

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

1981 J24 Tangent 2930
Tommays
Northport NY


If a dirty bottom slows you down what do you think it does to your boat
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
tommays is offline  
Quote Quick Reply Share with Facebook
post #6 of 32 Old 05-06-2010
Senior Member
 
Join Date: Jun 2006
Posts: 2,394
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 12
     
PLEASE - take it to a rebuild shop.
Brushes are about 12 bucks, diode pack about 15, and regulator about 20.00
(along with a diff diode pack and regulator, can make the prestolite, or motorola, or the delco to push out 50 amps.)

We are not primarily on earth to see through one another, but to see one another through

Some people are like slinkies: not really good for anything... but you can't help laughing when you push them down the stairs
cardiacpaul is offline  
Quote Quick Reply Share with Facebook
post #7 of 32 Old 05-06-2010 Thread Starter
Justa
 
Join Date: Feb 2007
Location: Strasburg, Virginia (I need more work near the 'Neck')
Posts: 39
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
OK, I;ll bring it back with me this weekend and have a local guy check it out and see what he'll charge to rebuild it.

I was just a little shocked when I looked up how much the replacements were.
seaspot is offline  
Quote Quick Reply Share with Facebook
post #8 of 32 Old 07-11-2010 Thread Starter
Justa
 
Join Date: Feb 2007
Location: Strasburg, Virginia (I need more work near the 'Neck')
Posts: 39
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Just an update. The alternator was wrecked internally and was not able to be rebuilt.

Since I have tons of ventilation in my engine compartment, I just went with an AC Delco, one wire alternator. 80 amps, with core exchange, I just gave them an old GM I had sitting around, $29.99 out the door.

Hooked it up and I now have a ton-o-charging.
seaspot is offline  
Quote Quick Reply Share with Facebook
post #9 of 32 Old 07-11-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 15 Times in 12 Posts
Rep Power: 14
         
Bad idea to go with an automotive alternator. IIRC, they are not ignition protected...and as such are an ignition source for explosions on a gasoline powered boat.

Quote:
Originally Posted by seaspot View Post
Just an update. The alternator was wrecked internally and was not able to be rebuilt.

Since I have tons of ventilation in my engine compartment, I just went with an AC Delco, one wire alternator. 80 amps, with core exchange, I just gave them an old GM I had sitting around, $29.99 out the door.

Hooked it up and I now have a ton-o-charging.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #10 of 32 Old 07-11-2010 Thread Starter
Justa
 
Join Date: Feb 2007
Location: Strasburg, Virginia (I need more work near the 'Neck')
Posts: 39
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
If there are fumes sure. The main difference is just the internal screen, which the old A4 alternator didn't have anyway. I figured that out when I took it apart.
seaspot is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome