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HomeRepair HelpBriggs & Stratton RepairBriggs & Stratton Small engine battery keeps draining Repair
Briggs & Stratton Small engine battery keeps draining
When your Briggs & Stratton engine battery keeps draining, the charging system is not supplying enough voltage while the engine runs. The most likely cause is a defective voltage regulator. This part controls the voltage sent from the alternator to the battery, and a failed regulator can cause a small engine battery not charging, an engine battery that dies quickly, or a battery that will not hold charge. The next likely cause is a faulty alternator. Use a multimeter to test alternator output before replacing it. A weak or damaged battery can also lose its charge, but test the charging system first so a new battery does not drain again. Inspect the battery cables and charging connections for loose, corroded, or damaged wiring as well. These checks can help identify why your engine is not charging and prevent repeated battery failure. Enter your model number to find the exact Briggs & Stratton voltage regulator, alternator, battery, or other replacement part that fits your specific engine.
01 - Briggs & Stratton Voltage Regulator
While the engine is running, the voltage regulator sends the proper amount of voltage from the alternator to the battery to keep the battery charged. If the voltage regulator is defective, the battery won't receive enough voltage, causing the battery to drain quickly.
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02 - Briggs & Stratton Alternator
To determine if the alternator is defective, use a multimeter to test the alternator output.
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Frequently Asked Questions
Why does my Briggs & Stratton small engine battery keep draining?
How do I test the alternator and voltage regulator on a Briggs & Stratton engine?
Could the battery itself be causing my small engine battery to keep draining?
What should I check if my Briggs & Stratton engine is not charging the battery?
How do I find the correct Briggs & Stratton battery, alternator, or voltage regulator?