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1987 Lawn Chief 12 hP briggs not charging bat.

Posted by slls none (My Page) on
Thu, Jul 18, 13 at 18:01

Not going to dig into it until Saturday. What would be the most likely cause. It does have one wire coming off he stator.


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RE: 1987 Lawn Chief 12 hP briggs not charging bat.

Bad alternator or charge diode.
However, until you've had the battery charged & LOAD tested are you sure it's NOT the battery?
A 3 AMP charge system simply won't keep up with a bad battery.


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RE: 1987 Lawn Chief 12 hP briggs not charging bat.

  • Posted by slls none (My Page) on
    Thu, Jul 18, 13 at 19:12

Green charge light not on. No change in battery voltage, engine on or off. New battery.
So it has a 3 amp non regulated diode system ?


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RE: 1987 Lawn Chief 12 hP briggs not charging bat.

I probably spoke too soon-

Look for a "lump" in the wire that encloses the diode(s).
There could be 1 or 2.
OR
Possibly you do have a 5 or 9 amp system. IF so, the wire would go into a Voltage Regulator.

What's the color of the wire & connector?
Does it feed into a small "box, split into 2 separate wires or???

There are some other systems that have their specific color codes of wire/connectors.


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RE: 1987 Lawn Chief 12 hP briggs not charging bat.

  • Posted by slls none (My Page) on
    Sat, Jul 20, 13 at 11:10

You were right the first time, 3 amp non regulated diode system.
It is working, it is a marginal system.
The reason the charge light didn't show charge, bulb burned out.
After your post I went to the Briggs site, I got into there electrical systems. The 3 amp was shown and all the others.
Going to give the new battery a good charge and go from there.
Thanks for your replies.


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