wiring for B&S 12.5 flathead? - MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information
Small Engines and Repair

Midwest Mower Pro

 
Thread Tools Display Modes
post #1 of 6 Old 09-13-2012, 03:51 PM Thread Starter
Senior MTF Member
 
fordphan's Avatar
 
Join Date: Jun 2010
Location: Missouri
Posts: 127
Garage
wiring for B&S 12.5 flathead?

Hi everybody;
I have a 12.5 I/C B&S that was given to me, the only problem is when they removed it they cut the wires. There are three wires that come out of the starter side of the engine. A black wire that goes to the coil, I think is a kill switch wire. There are two wires that come out from under the flywheel one is white and one is black, what do these connect to? Thanks
fordphan is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 09-14-2012, 11:23 AM
2000 Posts and climbing!!!
 
Join Date: May 2009
Location: ontario
Posts: 2,282
Re: wiring for B&S 12.5 flathead?

One of the pair should have a diode in it . It's 12v dc and goes to battery positive , possibly at keyswitch tab in common with lead from battery. Does you carb have an anti-backfire solenoid? If not the second wire of the pair is lkely AC for lights if it comes from under the flywheel with the other wire. I think the anti backfire wire , if it existed, is paired in a connector with the coil kill wire.
38racing is offline  
post #3 of 6 Old 09-14-2012, 03:21 PM Thread Starter
Senior MTF Member
 
fordphan's Avatar
 
Join Date: Jun 2010
Location: Missouri
Posts: 127
Garage
Re: wiring for B&S 12.5 flathead?

Thanks for the info, it doesn't have a anti backfire on the carb.
fordphan is offline  
post #4 of 6 Old 09-14-2012, 09:54 PM
5000 Strong & Climbing
 
Join Date: Apr 2009
Location: Massachusetts
Posts: 5,648
Re: wiring for B&S 12.5 flathead?

Using the motor info on the fan shroud, the B&S website might have an instruction booklet for that engine which would list the wire colors. I had to install a 12.5hp into a machine that had a 10hp, and the B&S website saved me time. The 'diode' was not on the 12.5, nor on the remaining wiring for the 10, inmy case.
engine2quarters is offline  
post #5 of 6 Old 09-15-2012, 05:45 AM
Proud Member of the 1K Club
 
Cannon51's Avatar
 
Join Date: Mar 2009
Location: GA
Posts: 1,435
Re: wiring for B&S 12.5 flathead?

I found this while searching for something yesterday. It's PDF of briggs engine wiring.
Cannon
http://www.stripmine.org/sears//engi...ggswiring1.pdf
Cannon51 is offline  
post #6 of 6 Old 09-15-2012, 11:52 AM Thread Starter
Senior MTF Member
 
fordphan's Avatar
 
Join Date: Jun 2010
Location: Missouri
Posts: 127
Garage
Re: wiring for B&S 12.5 flathead?

Thanks so much for that wiring diagram. I copied it for future use. Again thanks for all your help.
fordphan is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the MyTractorForum.com - The Friendliest Tractor Forum and Best Place for Tractor Information forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

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
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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