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HomeRepair HelpWalbro Small Engine RepairWalbro Small engine battery keeps draining Repair
Walbro Small engine battery keeps draining
If your Walbro small 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 voltage from the alternator so the battery receives a proper charge. When the regulator fails, the battery may drain quickly, causing a small engine battery not charging problem or an engine that will not hold charge. The next most likely cause is a faulty alternator. Test the alternator output with a multimeter while the engine is running to determine whether it is producing the required voltage. A problem with the alternator can cause engine not charging battery symptoms and other alternator problems. Inspect the battery and wiring as part of your diagnosis, but replace the voltage regulator or alternator only after testing the charging system. Enter your Walbro small engine model number to find the exact replacement part for your specific engine and confirm fit before ordering.
01 - Walbro Small Engine 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 - Walbro Small Engine Alternator
To determine if the alternator is defective, use a multimeter to test the alternator output.
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Frequently Asked Questions
Why is my Walbro small engine battery draining?
How do I test the alternator and voltage regulator on a Walbro small engine?
Can a bad battery cause my small engine battery to keep draining?
How do I find the correct Walbro alternator or voltage regulator replacement part?
What should I do if my small engine still will not hold a charge after testing?
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