(Fixed) Why My Bad Boy Mower Starts Then Dies?

Do you find it frustrating that your Bad Boy mower starts and then dies? But you don’t know the actual reasons and their solutions, right?

The most common reasons behind this issue are fuel system failure, fault in the carburetor, clogged air fins, and electricity issues.

You can solve these issues with some troubleshooting methods. These procedures include inspecting the electrical system, replacing the damaged parts, and refilling oil.

In this article, I will explore the possible causes of this problem and provide troubleshooting and prevention tips.

This guide will help you keep your Bad Boy mower running smoothly.

So, let’s dive straight into the article without any further delay.

Bad Boy Mower Starts Then Dies – Reasons

Many reasons can cause your Bad Boy mower to start and then die. Here we will discuss the most common reasons, so let’s start.

1. Fuel System Failure

A common cause of a Bad Boy mower starting and then dying is a problem with the fuel system.

If the fuel filter is clogged, it can prevent fuel from reaching the engine. Therefore, it will cause it to start and then die.

Plus, if the fuel injectors are dirty, they can restrict fuel flow to the engine. It can result in the mower stalling.

And a faulty fuel pump can also cause the engine to start and die. Check the fuel pump and replace it if necessary.

Bad gas is another reason for the mower to start but then die. If the gas has been sitting for a while or is contaminated, drain the tank and refill it with fresh gas.

2. Electrical System

Another possible cause of a Bad Boy mower starting and then dying is a problem with the electrical system.

Here are some electrical system issues to look for:

Also Read: Bad Boy Fuel Gauge Not Working (Fixed)

Low Or Dead Battery

If the battery is dead or low on charge, it may not provide enough power to start the engine.

So, you should replace the battery or charge it fully before starting the mower.

Poor Spark Plug

A bad spark plug can also cause the mower to start and die. Moreover, it can also raise issues if it is damaged.

You should check and replace the spark plug if worn out or damaged. I recommend Champion Spark Plug but find one according to the model.

Faulty Alternator

If the alternator is not working properly, it can cause the battery to lose its charge quickly, leading to a stalled engine.

Check the alternator and replace it if necessary.

Faulty Safety Switch

Many mowers have safety switches that prevent the engine from starting if the blades are engaged, or the seat is not occupied.

If one of these switches is malfunctioning, it can cause the engine to stall shortly after starting.

Wiring Issues

Wiring issues, such as damaged or loose wires, can cause a Bad Boy mower to start and die.

Inspect the wiring harness for any visible damage or loose connections and repair or replace it.

3. Faulty Carburetor

One of the primary causes for a Bad Boy mower starting and then shutting off is a defective carburetor.

The carburetor is responsible for mixing fuel and air in the proper proportions and delivering it to the engine.

When the carburetor is not functioning correctly, the engine may start but stall shortly afterward.

Here are some issues with the carburetor that may cause this problem:

Dirty Or Clogged Carburetor

If the carburetor is dirty or clogged with debris, it can restrict fuel flow to the engine.

A dirty carburetor can also cause the engine to run rough or backfire.

Faulty Carburetor Components

The carburetor comprises several components, including the float, needle valve, and jets. These parts can wear out or become damaged over time.

If any of these components are not functioning correctly, it can cause the engine to stall.

Incorrect Carburetor Adjustment

If the carburetor is not adjusted properly, it can cause the engine to run too lean or too rich. Resultantly, it can cause stalling.

So, you should check the carburetor adjustment and adjust it if necessary.

4. Low Or High Oil Level

If the oil level is low or high, it can cause the engine to stall. So, the engine’s crankcase must have a particular amount of oil.

If it exceeds the limit, then it will develop pressure. Therefore, the engine will overheat and eventually shut down.

On the flip side, if the oil is low, it will not be sufficient to keep engine parts lubricated. So, the resultant friction will cause heat accumulation.

5. Plugged Or Broken Cooling Fins

The engine will get extremely hot if your mower’s cooling fins are not working properly.

So, you should check it, and in case of clogging and damage, change it immediately.

6. Fuel Cap Issues

If the fuel cap is not venting properly, it can create a vacuum in the fuel tank. So it will prevent fuel from flowing to the engine.

You can solve this issue by checking the fuel cap and replacing it if necessary. You can check the 3.5 inches Tethered Fuel Cap here.

7. Bad Ignition Coil

When the mower is hot, the ignition coil winding might get separated.

In this situation, the spark plugs cannot receive the voltage necessary for the spark. As a result, the mower may die after working for some time.

Troubleshooting Tips

If your Bad Boy mower is starting and dying, some easy methods can help resolve the issue.

Here we have shortlisted some troubleshooting tips to help you diagnose and fix the problem:

Check The Fuel System

If the issue is created due to old fuel, empty the tank with a fuel siphon. After that, refill the tank with new oil.

You should also check the fuel system parts, such as the fuel filter, fuel injectors, fuel pump, and gas tank.

Make sure everything is clean and functioning properly. If these parts are not working accurately, replace them.

Inspect The Electrical System

The next step is to inspect the electrical system components. And try to figure out any faults and damage.

You should check out electrical parts such as the battery, spark plug, alternator, safety switches, and wiring harness.

If you find an issue in any of the abovementioned components, repair or replace them.

Clean Or Replace The Carburetor

If the carburetor is dirty or damaged, it may need to be cleaned or replaced.

Use a carburetor cleaner to remove any buildup and improve fuel flow to the engine.

Replacement of Ignition Coil

With the assistance of an ohmmeter, you can detect the issue in the ignition coil. If you find any break in the continuity, there is a problem.

So, you should fix this issue by replacing it with a new ignition coil. You should give a try to the DEF Ignition Coil. 

Prevention Tips

It’s possible to prevent the issue that causes your Bad Boy mower to start for a few seconds and then die. 

All you need to do is follow some prevention tips. So, here we have compiled some tips that can be effective.

Regular Maintenance

Maintenance is necessary if you want optimal performance from your Bad Boy mower.

So, perform regular maintenance on your mower, including oil changes, filter replacements, and tune-ups.

Quality Fuel

If you are using below-par fuel, it will not only affect the efficacy but can also damage the mower.

So, you should always use high-quality fuel that is fresh and free of contaminants. It will ensure the smooth functioning of a Bad Boy mower.

Proper Storage

Store your Bad Boy mower in a clean, dry, and secure location when not in use. It will protect it from the elements and prevent damage to its components.

Keep the storage place away from access to children or animals. Cover the mower with a sheet to prevent dust and debris from building up.

Frequently Asked Questions (FAQs)

Why does my lawn boy mower start but won’t stay running?

If your lawnmower has this issue, check out the fuel cap vent.
Mostly, the cap gets blocked or clogged and restricts the air. Resultantly, the Bad Boy mower stops working.

What are the symptoms of a bad spark plug?

The following are the symptoms of a bad spark plug:

1. Trouble starting
2. Engine misfiring
3. Lack of acceleration
4. High fuel consumption

Why does my lawnmower run for a few minutes and then die?

In most cases, the main reason for this issue is the bad spark plug.
You need to check the spark plug and replace it immediately.

Also Read: 8 Common Bad Boy Mowers Problems [Fixed]

Conclusion

I must say that multiple issues can cause a Bad Boy mower that starts and then dies.

So, it’s extremely important to pinpoint the actual cause. It will surely aid you in picking the accurate troubleshooting method.

Note

If the issue with your Bad Boy mower is not going away even after following the troubleshooting tips, you should visit a technician.