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The reason your Husqvarna riding mower won’t stay charged might be due to a bad alternator, bad cell, defective regulator and corroded cables.

Read this article until the end to learn about the detailed troubleshooting tips to help you diagnose and fix the problem so that your mower can start with ease.

Contents show

Husqvarna Riding Mower Battery Won’t Stay Charged: Reasons and Fixes

Before I go into details, let’s look at some common reasons why your Husqvarna riding mower battery won’t stay charged and their practical fixes.

Reasons	Fixes
1. Bad cell	Get a new battery
2. Cables corroding in batteries	Maintain the battery to prevent corrosion.
3. Bad alternator	Contact a professional to solve the issue.
4. Reduced water level	Fill the hole with water thoroughly.
5. Bad or loose alternator belt	Contact a technician to fix the issue.
6. Defective Regulator	Replace the regulator
7. Unnecessary battery drainage	Avoid switching on headlamps or putting the power outlet on an always-on function when you are not using the mower.

1. Bad Cell

It is common for your mower battery to get defective after some time. If the cell of your battery is bad, it means that the charging cycle will reduce regularly. Ensure that you get a battery if the cell is bad.

Diagnosis

Inspect your battery for bad cells. If you detect bad cells in the battery, it means that it requires a replacement

Fix

Get a new battery.

2. Cables Corroding in Batteries

Corrosion can occur in the cables and other contacts of batteries. When corrosion occurs in these components, it will stop the alternator from making a strong connection with your battery.

In this case, the battery will not have enough charge to support your riding mower to start.

Diagnosis

Check the cables and battery contacts for corrosion. If they are corroded, you need to maintain them properly.

Fix

Always maintain your battery to prevent corrosion from occurring.

3. Bad Alternator

This is one of the reasons why your Husqvarna riding mower battery won’t stay charged. The function of an alternator is to recharge the battery while it is operating on the mower. If it is bad, your battery will not be able to charge.

Diagnosis

Check the alternator for defects. If you discover that the engine stalls after operating for a while, it indicates that the alternator is bad.
Check if the headlamps have lost their brightness within a few minutes of operation. This is also an indication that the alternator is bad.

Fix

Contact a professional to solve the problem for you.

4. Reduced Water Level

Another reason why your Husqvarna riding mower battery may not stay charged is its reduced water level.

If your battery has holes and the water level is reduced, it may cause your riding mower battery not to work well.

Diagnosis

If your Husqvarna riding mower has holes where water should be filled, check through it and inspect the water level.

Fix

Fill the hole with water thoroughly.

5. Bad or Loose Alternator Belt

An alternator that is too old loose may cause your mower battery to not function well. In this case, the alternator will not be able to provide enough electricity to recharge your riding mower battery.

Diagnosis

Check the alternator for defects. If it is bad, old or loose, it indicates that it requires replacement.

Fix

Contact a technician to fix the issue for you.

6. Defective Regulator

This problem is familiar to the battery of the Husqvarna YTA18542 riding mower.

A bad regulator may cause your Husqvarna riding mower battery to drain. It can also prevent the battery from charging, affecting the performance of your mower battery.

Diagnosis

Check the battery for signs of drainage. If your battery constantly drains or it does not recharge, you may need to check the regulator for defects

Fix

Replace the regulator or contact a technician if it is still not working.

7. Unnecessary Battery Drainage

If you have checked for defects in the alternator, regulator and the battery itself, the problem could be unnecessary battery drainage.

The possible reasons for unnecessary drainage are the use of a power outlet with an “always-on” function or if the headlamp is on when you are not operating the mower

Diagnosis

Check if the power outlet is on an “always-on” function. In addition, take a look at the headlight to see if it is on when you are not using the mowing machine.

Fix

Avoid switching on headlamps or putting the power outlet on an always-on function when you are not using the mowing machine.

Why Does My Husqvarna Mower Battery Keep Dying?

Here are some reasons why your Husqvarna mower keeps dying:

Dead Battery Cells

One or more battery cells may be dead, causing the mower battery of your Husqvarna mower to keep dying.

Diagnosis

Use a battery charger to charge the battery. If the battery does not hold a charge, it means that the battery is faulty.

Fix

Replace the defective battery.

Defective Lawn Mower Alternator

The alternator is responsible for providing voltage to the mower while the engine is in operation. In addition, it recharges your battery. If the alternator is defective, it may let your battery keep dying.

Diagnosis

Use a multimeter to test the voltage output of the alternator according to the wiring diagram. Check the alternator for faults and troubleshoot it if it is defective.

Fix

Contact an expert to fix the problem for you.

Bad Lawn Mower Charger

This is also one of the reasons why your battery may keep dying. It is possible that the battery charger isn’t providing the ideal voltage output.

Using a multimeter to test your charger will help to verify if it is providing the right voltage output.

Diagnosis

Check the charger for proper voltage output by using a multimeter. You can also test the charger’s outlet to be sure that it hasn’t tripped a breaker. If the charger is not providing the ideal voltage, it indicates that you should change it.

Fix

Replace the faulty lawn mower charger.

Bad Voltage Regulator

The function of the voltage regulator is to send the right amount of voltage from the alternator to the battery so that it can be charged.

If it is faulty, the battery will be unable to get adequate voltage and this can cause your battery to drain quickly.

Diagnosis

Check the voltage regulator to see if it’s receiving enough voltage. If not, it means that the voltage regulator is faulty.

Fix

Replace the faulty voltage regulator.

How to Maximize Lawn Mower Battery Performance

Here are some tips on how to maximize the performance of your lawn mower:

Check your batteries regularly to determine if it is charged.
For a better run-on, ensure that you operate the mowing machine for a few minutes during the off-season.
Make sure that the battery cables and other components are properly fastened.
To prevent battery damage, you need to keep your riding mower at an optimal temperature.

Husqvarna Riding Lawn Mower Battery Maintenance Tips

Here are some tips to maintain your riding lawn mower battery:

Clean off the corrosion on your battery terminals.
Get the proper battery charger to charge your Husqvarna riding mower battery.
Open the battery plates and carefully use a vacuum to clean between the holes
Replace the bolts if they are corroded.
Inspect the fuse and ensure that they are in good condition.
Ensure that you keep the battery charged.

Conclusion

A good Husqvarna riding mower battery will ensure smooth starts as long as other components are entirely okay.

If you notice that it does not stay charged, it can be that the alternator is bad, the regulator is bad or there is a reduced water level.

Read our troubleshooting guidelines to enable you to solve your Husqvarna riding mower battery problems and ensure optimal battery performance.