Craftsman lawn tractor wiring

Posted by on September 17, 2006, 2:34 pm

I've just replaced the engine on my 18.5 hp Craftsman lawn tractor. It
has a Briggs engine (31P7770296E1, 18.5 hp OHV Intek Plus). Although I
replaced the engine with the exact same model number there is one wire
configured differently on the new engine.

The old engine had one wire attached from the flywheel to the
regulator. The new engine has two wires connected to the flywheel.
I'm assuming one is a hot wire to the regulator the same as the
original engine and that the other wire is a ground.

Can anyone provide any information on this or direct me to a schematic?

Thanks,

Darrell

Posted by trainfan1 on September 17, 2006, 5:33 pm

darrell@computerrx.biz wrote:

> I've just replaced the engine on my 18.5 hp Craftsman lawn tractor. It
> has a Briggs engine (31P7770296E1, 18.5 hp OHV Intek Plus). Although I
> replaced the engine with the exact same model number there is one wire
> configured differently on the new engine.
>
> The old engine had one wire attached from the flywheel to the
> regulator. The new engine has two wires connected to the flywheel.
> I'm assuming one is a hot wire to the regulator the same as the
> original engine and that the other wire is a ground.
>
> Can anyone provide any information on this or direct me to a schematic?
>
> Thanks,
>
> Darrell
>

One lead from the alternator coils is for charging the battery, the
other is for lights. Typical for a Briggs is 3 amps to the rectifier
for charging, & 5 amps AC for lighting.

Rob

Posted by *Rick* on September 17, 2006, 5:41 pm

On Sun, 17 Sep 2006 11:34:16 -0700, darrell wrote:

Darrell,

If you follow the instructions in the headers and email me direct I can
scan the schematic I have for my Sears riding mower w/17.0-hp Briggs, 42"
cut w/Auto-Trans. There is also a pictorial view of the wire harness that
I can scan and send from the manual.

Be sure and include my name as *Rick* in subject line.

--
*Rick*
I prefer that replies come to group, please.
See 'A' & 'B' in headers for e-mail.

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