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Old July 13th, 2008, 10:33 PM   #1
CHVYPWR
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Default Any Briggs & Stratton experts here?

On my 111 lawn tractor I upgraded from a 11hp to a 12hp I/C engine. The old 11hp had one wire coming out of the charging system going to the wire harness. The 12hp I/C engine has 2 wires both with 13v output when running. I have one hooked up to where the original 11hp wire went, but it doesn't seem to charge enough beacause th battery will be dead after a mowing. Should this other wire be connected too, or should it be run to the pto to spare the load on the charging system? I'm not ruling out a junk battery here yet either. Basically what I'm wondering is, can this 2nd wire help with charing/power load in some way.
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Old July 13th, 2008, 11:02 PM   #2
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I would get the alt. checked as well.
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Old July 14th, 2008, 02:00 AM   #3
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Originally Posted by Plato2k5 View Post
I would get the alt. checked as well.
It puts out 13 volts out of both wires.
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Old July 15th, 2008, 12:47 PM   #4
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Wouldn't really hurt anything to run the PTO off the other wire, I'd give it a shot at least. (if it's 12V DC)

I didn't work on I/C motors, just standard ones though years ago.

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Old July 15th, 2008, 01:54 PM   #5
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Originally Posted by CHVYPWR View Post
On my 111 lawn tractor I upgraded from a 11hp to a 12hp I/C engine. The old 11hp had one wire coming out of the charging system going to the wire harness. The 12hp I/C engine has 2 wires both with 13v output when running. I have one hooked up to where the original 11hp wire went, but it doesn't seem to charge enough beacause th battery will be dead after a mowing. Should this other wire be connected too, or should it be run to the pto to spare the load on the charging system? I'm not ruling out a junk battery here yet either. Basically what I'm wondering is, can this 2nd wire help with charing/power load in some way.
If I remember right,..........the I/C units actually run the headlights off from AC current (there is something they do funky with the mag)..............There is a special 6 prong key switch that you will need to purchase which will isolate the wires correctly. Otherwise you will have to add a toggle switch. This is what I believe the extra wire is for.

I have a wiring diagram somewhere, I will post an image of it tonight.
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