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J.R.
J.R., Small Engine Technician
Category: Small Engine
Satisfied Customers: 7445
Experience:  Owner of outdoor power equipment business, repairing all makes and models.
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My charging system on my Briggs & Stratton 20HP is not working.

Resolved Question:

My charging system on my Briggs & Stratton 20HP is not working. I have tried new batteries. I tried disconnecting the battery.
Submitted: 7 years ago.
Category: Small Engine
Expert:  J.R. replied 7 years ago.
Do you have access to a volt meter? What are the model numbers off of the engine?
Customer: replied 7 years ago.

BG20252 Intek 20 Twin V OHV

 

I tried a volt meter on the battery. The mower is a John Deere

Expert:  J.R. replied 7 years ago.
I need the all of the model numbers off of the engine. It have a type and code number also.
Customer: replied 7 years ago.
GXL120A121033
Expert:  J.R. replied 7 years ago.
The numbers should be stamped into one of the valve covers.
Customer: replied 7 years ago.
Ok, Model 40677 code 04010yg type 0139 e1
Expert:  J.R. replied 7 years ago.
You left a digit out of the model number.
Customer: replied 7 years ago.
406777
Expert:  J.R. replied 7 years ago.

OK,

 

The engine will have some wires that come out from under the flywheel and go to the voltage regulator. There will be a connector in between them. What color are those wires?

Customer: replied 7 years ago.
yellow
Expert:  J.R. replied 7 years ago.
To test the condition of the stator output. Unhook the plug. Set the meter to ACvolts. Run the engine at high RPM. Put the test leads on the 2 yellow wires. You should have a minimum of 26volts. If you have lower out put than that then the stator under the flywheel is bad. If the voltage is OK, then you most likely have a bad regulator.
Customer: replied 7 years ago.
I got 9 volts
Expert:  J.R. replied 7 years ago.
The stator under the flywheel needs to be replaced.
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