Honda 8HP outboard to charge 12V - SailNet Community
 
LinkBack Thread Tools
post #1 of 7 Old 08-09-2012 Thread Starter
Senior Member
 
Join Date: Jul 2012
Location: Toronto
Posts: 244
Thanks: 2
Thanked 5 Times in 4 Posts
Rep Power: 3
 
Honda 8HP outboard to charge 12V

I only have DC on Edel 22'. No shore power. Minimal requirements: interior lights that I will update to LED. Doubtful I will ever be in a situation where I am sailing in dusk or dark and in need of nav lights. No radio. No bilge pump.

The previous owner is storing the Honda 8hp (BF8A) until next spring. In reading its manual I noted that it comes with a cord and outlet that allows the Honda to charge a 12V. (12V/ 5amps)

As I was considering getting an intelligent charger to hook up to shore power being able to top up my 12V with the Honda is another option.

Has anyone used this type of charging set up? How long do you charge? How often?

Thanks
i_amcdn is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 7 Old 08-09-2012
Large Member
 
Join Date: May 2007
Location: Texas
Posts: 1,000
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 9
 
Re: Honda 8HP outboard to charge 12V

I have a Honda 8hp with the plug. Honestly, I have never really used it. The problem with outboards and sailboats, they aren't usually run long enough to really charge much plus the rated amps in the book is it full throttle, which they are rarely run at. Of course it depends a lot on your usage.

Sure it could help but it's not like a little fishing boat where you might be running it all day. I did the charger thing with an extension cord for a while, then switched to solar instead of installing a proper shore power system. Shore power can lead to other issues especially if not done correctly and some others even if done correctly.

Last edited by mdbee; 08-09-2012 at 11:14 PM.
mdbee is offline  
Quote Quick Reply Share with Facebook
post #3 of 7 Old 08-10-2012
Senior Member
 
asdf38's Avatar
 
Join Date: Jul 2010
Posts: 740
Thanks: 1
Thanked 8 Times in 8 Posts
Rep Power: 5
 
Honda 8HP outboard to charge 12V

Right, even a small 5w solar panel is going to be better here than the motor with a 5a alternator.

Definitely go LED. No Nav lights? I love sailing at night.
asdf38 is offline  
Quote Quick Reply Share with Facebook
post #4 of 7 Old 08-10-2012
Member
 
Join Date: Apr 2012
Location: Vancouver
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Honda 8HP outboard to charge 12V

For the 9.9 and the 15 hp (bf15a) it is possible to upgrade the charging coil to produce a higher amperage. I am not sure if that is available for the 8 hp version. Something to look into. I think it almost doubled the amps.
MarkusM is offline  
Quote Quick Reply Share with Facebook
post #5 of 7 Old 08-10-2012
Senior Member
 
tommays's Avatar
 
Join Date: Sep 2008
Posts: 4,296
Thanks: 1
Thanked 30 Times in 30 Posts
Rep Power: 7
 
Re: Honda 8HP outboard to charge 12V

While and outboard will charge the amount of time the motor needs to run makes it a bad pick for a sailboat as a stern mounted 20 to 40 watt solar pannel will just sit there and take care of it

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 7 Old 08-10-2012
Member
 
Join Date: Nov 2009
Location: eastern shore of nova scotia
Posts: 31
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Honda 8HP outboard to charge 12V

I too have an 8hp honda for my boat. Like you no nav lights and I have a bilge pump and depth sounder fish finder combo. I make sure that my battery is fully charged at the begining of the season. I have yet to take my battery out to recharge it. The fish finder draws very little and the bilge pump is used occaisionally. I have to motor out of the dock and into the harbour were I am about 10 mins at most, same on the return trip. So I find that the motor charges the battery OK. If that is what you have to do or there abouts then I would not worry about it.
Anthony
anthony1 is offline  
Quote Quick Reply Share with Facebook
post #7 of 7 Old 08-10-2012
Senior Member
 
asdf38's Avatar
 
Join Date: Jul 2010
Posts: 740
Thanks: 1
Thanked 8 Times in 8 Posts
Rep Power: 5
 
Re: Honda 8HP outboard to charge 12V

There is a principle to remember here which is that the current a battery will accept decreases at it charges up. The last 10-20% or so takes an hour + regardless of your charging source. This is what makes the solar panel great for a mooring boat.

Even if you run the engine enough to supply plenty of energy on paper it won't run long enough to top it off. So even your lightly used battery will spend all season at 60%-80% instead of 100%. Not a huge deal but it decreases the life of the battery. Even a 2W or 5W solar panel, I have this one, could probably keep your bank at 100% all season.

I literally just throw this panel on the cockpit seat and plug it into the cockpit lighter outlet when I leave the boat (the outlet has a diode wired for this purpose). So far it's kept my group 27 and group 24 at a good 12.5V.

Amazon.com: Instapark® NEW All Black 5W High-Efficiency Mono-Crystalline Solar Panel: Patio, Lawn & Garden Amazon.com: Instapark® NEW All Black 5W High-Efficiency Mono-Crystalline Solar Panel: Patio, Lawn & Garden


asdf38 is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

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



Similar Threads
Thread Thread Starter Forum Replies Last Post
Honda outboard problems Variant_530 Gear & Maintenance 15 04-17-2012 09:27 AM
Honda Gen won't charge Crepard Electrical Systems 20 07-31-2011 06:30 PM
Using the outboard to charge battery lightyear22 Gear & Maintenance 4 03-04-2006 10:59 AM
Honda 4 stroke outboard mikehoyt Gear & Maintenance 4 05-24-2002 05:08 AM
Honda Outboard GGartin Gear & Maintenance 0 01-14-2001 05:14 PM

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