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HomeRepair HelpSnapper RepairSnapper Small engine battery keeps draining Repair
Snapper Small engine battery keeps draining
When a Snapper small engine battery keeps draining, the charging system is usually not supplying enough voltage while the engine runs. The most likely cause is a defective voltage regulator. This part controls voltage from the alternator to the battery, and a failed regulator can leave the battery undercharged, causing engine battery draining, a small engine battery not charging, or an engine that won't hold a charge. The next likely cause is a faulty alternator. Test the alternator output with a multimeter before replacing it, since low output can prevent the battery from charging even when the battery itself is good. These charging components can cause engine not charging battery problems and other Snapper alternator problems. Check the battery, wiring, and electrical connections as well, but start with the voltage regulator and alternator. Enter your Snapper model number to find the exact replacement part for your specific engine. Matching the model number helps ensure the regulator or alternator has the correct electrical specifications and mounting design for your Snapper equipment.
01 - Snapper 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 - Snapper 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 Snapper small engine battery keep draining?
How do I test the Snapper alternator and voltage regulator with a multimeter?
Could a bad battery be the reason my Snapper engine will not hold a charge?
What should I check before replacing the Snapper voltage regulator or alternator?
How do I find the correct Snapper battery, alternator, or voltage regulator?