Alternator output - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 05-25-2008
vabuckeye's Avatar
Senior Member
 
Join Date: Apr 2007
Location: Williamsburg, Va
Posts: 146
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
vabuckeye will become famous soon enough vabuckeye will become famous soon enough
Alternator output

I just checked the alternator output on my 7.5 hp evinrude yachtsman. I came up with 22 volts dc. Seems a little high too me. I was expecting around 15 vdc. Is this normal, should I add a voltage regulator, or am I having alternator issues.

I went to the evinrude site without luck. Any help would be appreciated.

Jim
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 05-25-2008
timebandit's Avatar
Senior Member
 
Join Date: Sep 2002
Posts: 928
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
timebandit is on a distinguished road
Why did you check it?
Was something wrong?
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 05-25-2008
denby's Avatar
Senior Member
 
Join Date: Feb 2007
Location: Dead Sea, some times called Long Island Sound
Posts: 2,527
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 11
denby is a jewel in the rough denby is a jewel in the rough denby is a jewel in the rough denby is a jewel in the rough
It should be 16 to 18 volts. Doesn't it have a regulator already? I think it should.
__________________
Dennis
O'Day 302

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

Be careful or i will do what the voices tell me to do
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To get the most from Sailnet, follow the link in
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
's signature.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Hey stuffit "Get a life"
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 05-25-2008
vabuckeye's Avatar
Senior Member
 
Join Date: Apr 2007
Location: Williamsburg, Va
Posts: 146
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
vabuckeye will become famous soon enough vabuckeye will become famous soon enough
I checked it because I was curious to the output as I have never had an outboard with a charging system. I felt I should know what I was hooking to the battery. Also wanted to make sure it was worth hooking up.

I checked for a regulator and am uncertain if it has one. I traced the wiring to a junction block and from there to a small round object about the size of a quarter and 1/2 inch thick. Other than that, nothing.

I need to find a break down of the engine. That is the only way I can tell for certain what I have.

Jim

I believe what I found is a rectifier.

Last edited by vabuckeye; 05-25-2008 at 02:03 PM. Reason: Add information.
Reply With Quote Quick reply to this message Share with Facebook
  #5  
Old 05-25-2008
timebandit's Avatar
Senior Member
 
Join Date: Sep 2002
Posts: 928
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
timebandit is on a distinguished road
My bet is that it will charge just fine if it is dc volts.
Once a battery is installed it will read the voltage and adjust output.
Should be just two wires--red and black.
Reply With Quote Quick reply to this message Share with Facebook
  #6  
Old 05-26-2008
Senior Member
 
Join Date: Apr 2008
Posts: 476
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
negrini is on a distinguished road
Send a message via AIM to negrini Send a message via Yahoo to negrini Send a message via Skype™ to negrini
Don't worry. The small amperage your engine offer (in general from 4 - 8 Ampers/hour) is small enough to not damage your battery in shorts cruise, considering it will be at least 7-10 times the amperage output (60A - 80A). And yes, same as my BF100 1979 Honda, it shows above 20DC without a battery installed. Relax ...
Reply With Quote Quick reply to this message Share with Facebook
  #7  
Old 05-26-2008
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
Did you measure AT the battery terminals with the engine hooked up and running? That is the only way to do it.
__________________
No longer posting. Reach me by PM!
Reply With Quote Quick reply to this message Share with Facebook
  #8  
Old 05-26-2008
vabuckeye's Avatar
Senior Member
 
Join Date: Apr 2007
Location: Williamsburg, Va
Posts: 146
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
vabuckeye will become famous soon enough vabuckeye will become famous soon enough
The battery was disconnected. I searched deeper into the evinrude/johnson forum and found the same thing you all have stated. The output will be off if the battery is disconnected and it is not good for the engine to run without a battery.

I'm off to hook it up and recheck.

Thanks for the time and have a good day.

Jim
Reply With Quote Quick reply to this message 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:

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

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



All times are GMT -4. The time now is 03:39 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.