Small Engines (Lawn Mowers, etc.)/Honda GX610 no charging


QUESTION: I have a Honda GX610 on a Grasshopper mower with about 500 hrs on the engine.  The engine starts and runs fine but fails to charge the battery.  The battery has been replaced as well as the rectifier/regulator.  I have also failed to find a broken wire.  What do I check next (the strator?) and how do I test it.


ANSWER: Check out this Briggs URL:

It is not your specific application but they work the same.  Don't worry about the DC amps at this point.  I'd start by checking DC volts at the battery with the engine off and with the engine running.

With the engine running you should see an increase in DC volts.

Did you search You Tube?  There are several videos posted.

Let me know if the DC volts increase when the engine is running at full speed.


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

QUESTION: DC volts at the battery does not increase with the engine running (full speed).  The voltage actually reads slightly lower, about 1/10 of a volt, I presume due to what the starter drew.

Yes, the starter will take some of the voltage but you should see the voltage increase within a minute or so indicating the charging system it replacing the voltage.

Does the regulator have a plug that you can either dis-connect or can you access the pins with it connected to check for AC volts in and DC volts out?

How many wires or pins does the regulator have?


Small Engines (Lawn Mowers, etc.)

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Eric A. Jones


Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.


Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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