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 Wire diagram for most B&S engines

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Ddwannabe
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PostSubject: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeWed Apr 03, 2013 11:47 pm

This wire diagram will work for a big majority of Lawn Tractors with a B&S engine.
This is the wire set up i got in my tractor and i like it.
https://www.atltf.com/t1968-racing-lawn-tractor-mean-rabbit

Wire diagram for most B&S engines  Wire_d11

PS: If you use the teather switch when you are done, un hook the teather switch. If you don't it will drain your battery.


Last edited by Ddwannabe on Thu Apr 04, 2013 12:12 pm; edited 1 time in total
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Doug
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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeThu Apr 04, 2013 12:44 am

This will actually work for just about any tractor. I was thinking of making one for the forums use but you beat me to it.

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Last edited by Doug Fackler on Sat Apr 06, 2013 1:28 pm; edited 1 time in total
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truckin42
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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeThu Apr 04, 2013 8:41 am

@Ddwannabe wrote:
This wire diagram will work for a big majority of Lawn Tractors with a B&S engine.
This is the wire set up i got in my tractor and i like it.
https://www.atltf.com/t1968-racing-lawn-tractor-mean-rabbit
Wire diagram for most B&S engines  Wire_d10
PS: If you use the teather switch when you are done, un hook the teather switch. If you don't it will drain your battery.
This will be helpfull when i rewire my mud mower.
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TheRainbowBoxer
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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeThu Apr 04, 2013 8:56 am

There is a problem I am seeing here. You have your lights' power source, ammeter feed, and carb kill power source attached to the starter side of the solenoid. If you wired it exactly as you have it posted, these parts will only work while you are cranking, and the engine will die as soon as you let off (carb kill).

I think you need an ignition switch to connect all of these to.

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Ddwannabe
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PostSubject: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeThu Apr 04, 2013 11:52 am

o dang i just noticed that sorry ill fix it.
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Ddwannabe
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PostSubject: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeThu Apr 04, 2013 12:13 pm

fixed
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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeFri Apr 05, 2013 2:49 pm

Thanks, this is way nice and now it's even correct. bounce

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mudmonkey06
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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeSat Apr 06, 2013 7:04 am

i just rewired my mtd and i used this thank you for posting it simplified a lot
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redlinemotorsportts
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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeSat Apr 06, 2013 4:25 pm

yea I cut out a lot of spaghetti of the safty switched it and only had to run a wire from the key ignition to the solinoid.

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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeMon Dec 12, 2016 9:11 pm

I am having a couple problems with the diagram even though I have a Briggs & Stratton engine. First of all my mower has a 4 pole solenoid, not a 3 pole. Secondly, I have two wires coming from my starter mower, not one. So I am wondering how the diagram should look to suit my mower? I hope someone can help.
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Doug
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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeMon Dec 12, 2016 9:23 pm

@DIYfreak wrote:
I am having a couple problems with the diagram even though I have a Briggs & Stratton engine. First of all my mower has a 4 pole solenoid, not a 3 pole. Secondly, I have two wires coming from my starter mower, not one. So I am wondering how the diagram should look to suit my mower? I hope someone can help.

On the 4 pole solenoid, one of the blade tangs goes to ground and the other is the lead from the key.

On 2 wire charging units, one of the wires should have a lump in the wire near the plug. Its a diode, and that lead goes to the battery positive because its the charging wire. Usually its red.

The other wire without the diode lump is used to go to lighting. However since it is entirely dependent on engine RPM most people dont use it since the lights will flicker.

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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeMon Dec 12, 2016 10:08 pm

Thanks for the speedy reply Doug. I'm finding it a bit confusing. My mower is a Stiga 63 brand. It appears to have two black wires coming up from the starter motor. There is a separate wire coming from the Alternator, also black. I cannot see any lump for a diode.
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Doug
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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeMon Dec 12, 2016 10:30 pm

Can you take a pic?

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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeWed Dec 14, 2016 10:53 pm

@Doug wrote:
Can you take a pic?

I figured it out. There are two black wires coming from my starter motor. One is + (Pos.), the other _ (Earth). They only change to the red and black wires at a connection, so it was easy to tell which was which. I could not find any diode on the alternator wire.

I have now re-wired the Stiga mower as per the diagram and the additional advice. It has full crank now and starts straight away. Before I was always struggling with very sluggish cranking, no cranking at all, and/or a flat battery. There must have been a bad connection somewhere in the old circuitry, but I could never trace it. By completely bypassing the safety switches and the electric card, the problem is solved.

Many thanks for your help. Wire diagram for most B&S engines  2731072446
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Doug
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PostSubject: Re: Wire diagram for most B&S engines    Wire diagram for most B&S engines  Icon_minitimeWed Dec 14, 2016 11:27 pm

Glad you got it sorted! Wire diagram for most B&S engines  2731072446

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PostSubject: Starter trouble   Wire diagram for most B&S engines  Icon_minitimeWed Feb 01, 2017 10:26 pm

Greetings,

I just found this forum and used the corrected diagram to rewire my JD D125 to eliminate all the safety switch nonsense, it has a 20HP Briggs V-twin. I followed the diagram (i left out the light switch, not needed) and for the carb kill I left out a switch (ran a straight wire to the positive side of solenoid) since I am not racing with it (mowing only), however I cannot get the starter to kick over at all now, the solenoid works fine. Any suggestions on what I may have done wrong? Thank you for listening.
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jimtolken
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PostSubject: I got the....   Wire diagram for most B&S engines  Icon_minitimeSat Feb 04, 2017 10:58 pm

Greetings everyone,

I figured out my starter wasn't properly grounding to the engine block for some reason, so I wired in a new ground and got it to spin over, however, it did not crank. I am thinking the fuel shutoff solenoid isn't working and will bypass it tomorrow if I can figure that out. I will update y'all on the progress.
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PostSubject: Figured it out   Wire diagram for most B&S engines  Icon_minitimeMon Feb 06, 2017 12:51 pm

Howdy guys,

I grounded the starter, got plenty of spin, no crank. I tinkered all day sunday to no avail, I then went back to my old friend Google, searched for possible solutions and found a youtube video on how to test the coils/magnetos and I found out that over the past few months since I last ran her the coils/magnetos have degraded beyond being able to create enough spark to ignite fuel. Supposed to be 2.5k-5k ohms resistance optimal, I had 7k on both of them so I was getting spark just not anywhere near enough to go vroom. I have ordered replacements since I am an honest man and won't steal them off my neighbors mower, LOL!

This forum is a wonder of small engine awesomeness and I am glad to be here!
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