Can A Bad Battery Cause A Lawn Mower To Stall? Let’s Explore

Do you experience your lawn mower stalls without warning while mowing? Probably, this problem occurs due to a bad battery. But can a bad battery cause a lawn mower to stall?

Yes, a bad battery can stall your lawn mower. Your lawn mower battery performance also affects lawn mower performance. You should test the battery; if found dead, charge it and start your lawn mower.

Stay tuned here; we will teach you how to diagnose a dead battery if your mower stalls while mowing. Let’s come to the main discussion.

Can a Bad Battery Cause Your Lawn Mower to Stall?

Yes, if your lawnmower stalls, a bad battery can be a reason. If you have a bad battery, you may experience the following issues that lead to the engine’s stall.

You may face hard times when starting the lawn mower.  Sometimes it suddenly loses power and your lawnmower stalls.  Bad batteries take more time to charge or cannot charge fully.

If they charge, they quickly down the cells and you may experience interrupted service.  You have no solution other than replacing the bad battery with the new one.

Related Post: 4 DIY Methods How to Charge a Lawn Mower Battery Without a Charger?

How to Diagnose a Lawn Mower’s Bad Battery?

It is pretty simple to check and diagnose the lawn mower’s bad battery.  It is not a complicated process that may be completed in three to four steps. Let’s come to the process.

Things You Will Need:

• Adjustable wrench
• Latex or plastic gloves
• Safety glasses
• Digital Multimeter

You should have a Klein Tools MM300 Multimeter. It will ensure accurate voltage and is simple to operate. The multimeter is compatible with both AC and DC.

Step 1-Park Your Lawn Mower on a Flat Surface.

Park your lawn mower onto a flat surface and switch off the engine. Allow your lawn mower to cool for a few minutes. Wear safety gloves and glasses to ensure safety during work.

Step 2- Off the Lawn Mower Seat

Now off the lawn mower seat because the lawn mower battery is located under the seat switch.

Step 3- Remove the Lawn Mower Battery.

When you access the battery, unplug the battery from the terminals and pull it to remove it from the lawn mower. You can easily pull it.

Step 4- Connect the Digital Multimeter to the Battery.

Connect a digital multimeter to the battery to check the battery voltage. Connect the red pin of the digital multimeter with the positive terminal and the black pin with the negative terminal.

Your battery volts should be 12.5 volts. If it is less than 12.5 or at a danger level such as 1 or 2, it means your battery is close to dead.

The volts are only 1.97; your battery is near dead.

Step 5- Plug the Battery Into the Charger

Plug it back into the charger to confirm low battery voltage or bad battery issues. Leave it for 20 minutes to charge.

After 20 or 25 minutes, please remove the battery from the charger and test it again. If your battery has a low voltage issue, it will complete its voltage up to12.5 in 20 minutes.

But your battery is bad if you see the voltage is lower than 8 volts. If your battery is dead, you will need to replace it with a new one.

Read Also: Lawn Mower Ignition Switch Problems and How to Fix Them

How to Troubleshoot Bad Batteries That Cause a Lawn Mower to Stall?

Follow the steps below to troubleshoot bad batteries that cause a lawn mower to stall. Let’s see.

Step 1- Disconnect the Battery from the Power Source

First, check the key and ensure the key is not in the ignition. And then disconnect the negative terminal of the battery.

Step 2- Connect with a Multimeter.

Connect the battery to the terminal and check the voltage; it is 1.48, which means we have a drain on the battery. It is pretty close to zero.

Step 3- Backtrack the Electrical System.

To track the electrical system, start with unplugging one at a time until it goes to zero. Pull the fuse and perform the test; if it is zero, it is good.

Step 4- Disconnect the Power.

Then disconnect the power to the mower by removing the fuse.

Once you have removed it, test it again with a multimeter; when tested, it is zero.

Zero on the multimeter shows that drain is happening on this side.

Step 5- Test the Voltage Regulator.

Plug that back at the drain to check the voltage regulator. Disconnect the terminals one by one to test the voltage regulator. When checked, we find it is zero.

It means the drain is because of the voltage regulator, and you should replace it before replacing the bad battery with a new one.

How do I Extend my Lawn Mower Battery Life?

The most common cause of a bad battery is corrosion or irregular charging. So you should adopt the wise ways to keep your lawn mower battery in good health.

• Do regular cleaning and make sure there should be no corrosion, especially around the battery terminals. If you need to store it, store it in dry and clean places.
• Do not keep your lawnmower battery for a long time on charging. Unplug the battery when it is charged. Never allow your battery to go under 40 percent charging.

Following these tips will not just extend your battery life but also minimize battery issues.

Frequently Asked Questions(FAQs):

Final Verdict

Smooth lawn mower performance is only ensured when you have a battery in good condition. Bad batteries produce inconsistent performance; they may stall your lawn mower. You can test the bad battery with a multimeter to replace it with a new one.