If your Cub Cadet lawn mower battery keeps dying, start with the battery itself, since a bad cell is the most common reason a riding mower battery will not stay charged. Charge it fully with a battery charger, and if it still will not hold a charge, replace the battery. If the battery tests good, the next likely problem is the charger, so check charger output with a multimeter and make sure the outlet has power. After that, move to the charging system. A weak alternator can cause a mower battery not charging condition because it cannot supply enough voltage while the engine is running. The voltage regulator is another common cause of a riding lawn mower charging problem, since it controls how much voltage reaches the battery. If the regulator fails, the lawn mower battery drains quickly even though the engine runs. Testing each part in order helps you avoid replacing good components. To find the exact Cub Cadet battery, charger, alternator, voltage regulator, or other replacement part for your mower, enter your model number on RepairClinic.com.
01 - Cub Cadet Lawn Mower Battery
One or more cells in the battery may be dead. Try charging the battery with a battery charger. If the battery still won't hold a charge, this indicates that the battery is defective and will need to be replaced.
Enter model number to search for the required part specific to your product
To determine if the charger is defective, use a multimeter to test the charger for proper voltage output. In addition, test the outlet used by the charger, and ensure that the outlet has not tripped a breaker.
The alternator provides voltage to the lawn mower while the engine is running and also recharges the battery. To determine if the alternator is defective, use a multimeter to test the alternator voltage output according to the wiring diagram.
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.