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Briggs and Stratton electrical charging question


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#1 BMW1 OFFLINE  

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Posted July 05, 2016 - 08:34 PM

I have an 11hp Briggs motor on a 1973 lawn tractor.  The original 8hp motor was replaced with the 11hp by previous owner.

 

Engine number is 252707-0228-01 82031211.

 

Currently, the battery goes dead after awhile because I believe nothing is charging it.

 

There is a black wire coming out of the engine, near the starter - I believe it comes from the stator - that has a connector on it.  Looks like a connector that would be in an inline fuse holder, but it goes no where.  It's just hanging there.

 

Do I just need to get a 7 1/2 amp fuse, the other half of a fuse holder, and route that wire to the starter solenoid where the positive from the battery is connected so the battery charges? 

 

Thanks.


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#2 Auburn David OFFLINE  

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Posted July 05, 2016 - 09:08 PM

Those engines were nuclear powered as as I recall..did you install a fuel rod?


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#3 ducky OFFLINE  

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Posted July 05, 2016 - 09:14 PM

NOP.

Not sure on that engine but usually there are 2 wires coming out of the stator that put out AC Current/Voltage.  It should be in the 28 - 30+ volts AC.  These wires will go to rectifier that changes this to DC to charge the battery.  Seems you are missing the rectifier and 1 wire.  There may be a chance you only have 1 wire AC and the engine is the other but this is uncommon.


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#4 larrybl OFFLINE  

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Posted July 05, 2016 - 09:37 PM

Which alternator do you have? See attached.

Attached Files


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#5 drbish ONLINE  

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Posted July 05, 2016 - 11:56 PM

Here is the 1984 Briggs and Stratton Update Seminar.It has alternator ID and troubleshooting in it http://gardentractor...update-seminar/


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#6 glgrumpy ONLINE  

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Posted July 06, 2016 - 03:10 AM

A white wire is usually for running lights off of. Might be this wire had a diode there, so has holder for it, parts missing? Diode makes AC be DC to charge, other wire is not needed, ground to chassis as negative side? Or....Maybe this engine does Not Have charging stator in it?
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#7 KennyP ONLINE  

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Posted July 06, 2016 - 05:50 AM

I found a parts listing for this engine, but the type code doesn't go that small.

ScreenShot036.jpg


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#8 chieffan ONLINE  

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Posted July 06, 2016 - 06:20 AM

Pull the flywheel so you can see just what you have under there.  May have a small alternator to keep the battery charged for starting purpose.  If you have an electric clutch, you need the larger alternator to power the clutch, about 3 A plus keep the battery up.  Just went through this on a B&S twin.  Intek blew and had to get a flywheel from a large charging set up to fit the twin and use the rectifier/regulator off the Intek.  Good luck.


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#9 grattone ONLINE  

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Posted July 06, 2016 - 06:35 AM

Would it be possible for you to hook a meter to the wire ( + from the meter to the black wire and - to ground ) set the meter to DC Volts start the engine. Check for charge voltage, if nothing switch the meter to AC and check the output again. If you have DC volts 12-15 it would probably be ok to connect it to battery and see if that takes care of the problem, if AC then you will need some sort of rectifier or diodes.

good luck

Gratton


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#10 BMW1 OFFLINE  

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Posted July 06, 2016 - 06:53 AM

Thanks.  I will hook up a volt meter to the wire and let everyone know what I find.  I may take the flywheel off just to see what type of stator is on for my own curiosity and to make sure there wasn't another wire somewhere.  I bought the tractor from a young person and he did not know why the motor was changed or where the 11hp motor came from.



#11 BMW1 OFFLINE  

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Posted July 17, 2016 - 08:26 PM

A volt meter hooked to the wire while running is showing 14.5 volts.  I did not have time to take the flywheel off to look at stator.  Still would like to see what's under flywheel but seems like I should be able to put a fuse in and hook it to the starter solenoid.



#12 larrybl OFFLINE  

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Posted July 17, 2016 - 09:43 PM

Was that 14.5 AC or DC?


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#13 BMW1 OFFLINE  

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Posted July 19, 2016 - 11:40 AM

It was 14.5 volts DC.


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