Small Engines (Lawn Mowers, etc.): Stator for John Deere 111 with electric PTO, malt beverage, replacement engines

Question
QUESTION: I have a JD 111 with an 11 hp engine. The 111 has an electric PTO. I've seen
new engines with single charging systems, dual systems and higher
amperage DC systems. Which one is required to run an electric PTO and
charge the battery? Mine outputs AC which is changed to DC using a diode.
Does this mean I need the Dual and just need to tap the AC output? I have
read that some replacement engines require you to take the stator from the
old engine and install it in the new engine. I'd rather not do this if I don't have
to. Thanks for any assistance. I can not find answers anywhere.


ANSWER: Bad news Rick,You have to. The reason the replacement engines are cheaper is because they have only have a 5 amp charging system.

You need a single system with a 10 amp stator and a diode.  Your PTO clutch pulls 5 amps when new. Who knows how many amps your PTO clutch pulls! If it's original probaly about 8.

Swap the stator and diode or charge your battery every other time you mow.

---------- FOLLOW-UP ----------

QUESTION: Thanks for getting back to me.

How difficult is it to swap the stator? Do you have to remove the flywheel? I'm
sure I have the original stator. Should I just purchase a new one? Any idea of
cost? Part Number?

I found a chart on the web that says the Tri-circuit, 5A and 9A alternator uses
the same stator (part# 691065). How is this possible? Is there anything else I
need to swap besides the diode?

Thanks again
ANSWER: Remove the flywheel and swap the parts. Why spend money on a stator if you already have 1.

The 5A and 9A systems could work, but they don't hook up well to your tractor. The 5A isn't big enough and the 9A would have to be rigged.

Install the parts you already have and spend the money you saved on a cold frosty cereal malt beverage.



---------- FOLLOW-UP ----------

QUESTION: Thanks again. Based on your response, is my current setup a tri-circuit? How
many amps does it provide?

I'm just wondering in case I can't get the flywheel off. Also, will my stator fit
B&S engines up to 14.5 hp? If not will it fit a 12?

Thanks again for taking the time to assist me.

Answer
Your stator probably would fit any single cylinder side valve Briggs.
I'm not sure what system you have. If you have 2 leads coming from the stator and only 1 diode you have a dual system. The non diode lead is for headlights that can run on ac or dc power. I guess you could put a diode on the second lead and double your charge rate.

If you are worried about pulling the flywheel, remove all the fan shrouds and take the engine to a Briggs dealer. He'll pop the flywheel off while you wait. He will charge about 15.00.

A tri-circuit uses a regulator rectifier. That part alone would cost more than the correct stator.