How To Troubleshoot a Lawn Mower That Has No Electrical Power?

Have you ever experienced a situation where you were mowing with your lawn mower, and suddenly it stopped working due to no electrical power issue? If yes, you must have wondered whether it is possible to troubleshoot. If possible, then how to troubleshoot such a problem.

Firstly, gather up all the necessary tools. Now, turn your lawn mower Engine Off and place the Speed Control Lever in the High-speed position to adjust the speed control cable. Next, verify the High-speed setting and set it to the required Specification. Then, secure the Locknut after your lawn mower Engine & Exhaust cool down.

Continue reading the following article and learn how to troubleshoot a lawn mower that has no electrical power.

What Causes the Problem?

Electrical no power issues on a lawn mower can occur because of various reasons. Your lawn mower sometimes experiences no electrical power problem due to faulty electrical wiring connections or speed control cable malfunctioning.

It can also occur due to improper spark time adjustment or an incorrect amount of air or fuel.

Besides that, lack of power or no power trouble can arise because of a plugged air filter, stale or contaminated gas, clogged fuel filter, excess or too little engine oil.

In some cases, lawn mower users experience such commotion when the spark plug is dirty or damaged. Even a blocked carburetor, clogged deck, or a dull blade can also lead to similar trouble.

3 Steps to troubleshoot a Lawn Mower that has no electrical Power: 

Often lawn mower users encounter no power trouble while operating their mower at some point and this problem mainly occurs when the mower is getting older.

But have you ever thought about what might cause such trouble?

The most common reason for such commotion is the improper speed control cable adjustment and in today’s article, I have prepared a quick and easy DIY method of troubleshooting a lawn mower has no electrical power.

Things needed to troubleshoot a lawn mower has no electrical power:

Before moving to the step-by-step troubleshooting procedures, have a proper glance at the checklist of the required tools:

Tools
Standard Mechanical tool box
Tachometer
Safety Gloves & Goggles

Step 1- Turn the Engine Off & place the Speed Control Lever in the High-speed:

First, turn your lawn mower engine in the Off position as shown in the above picture.

Turn the Engine Off & place the Speed Control Lever in the High-speed

Then, place the speed control lever in the high-speed position.

Turn the Engine Off & place the Speed Control Lever in the High-speed 2

See, this is the speed control cable, which most probably needs proper adjustment if you are having no electrical power issue on your lawn mower.

Now, loosen the fastener securing the speed control cable.

Turn the Engine Off & place the Speed Control Lever in the High-speed 3

Then, gently pull the speed control cable to the point that it stops.

Turn the Engine Off & place the Speed Control Lever in the High-speed 4

Next, secure the fastener while holding the cable with your other hand.

Step 2- Verify the High-speed setting & set it to the required Specification:

Verify the High-speed setting & set it to the required Specification

After that, you need to verify the high-speed setting, and to do that, start the engine.

Verify the High-speed setting & set it to the required Specification 2

Next, adjust the high speed to specification.

Verify the High-speed setting & set it to the required Specification 3

Note: The specification for your particular lawn mower’s engine model is mentioned in your mower’s owners/ service manual. So, check the manual first and then, set it as shown in the image.

Now, loosen the lock nut on the high-speed adjustment with a wrench, and do not be surprised if you do not have a seven-millimeter wrench.

However, if you have one in your toolbox, that would be great.

Verify the High-speed setting & set it to the required Specification 4

Then, turn the screw clockwise to increase the high-speed setting.

Verify the High-speed setting & set it to the required Specification 5

When you are done, start the engine again to recheck the speed with a Tachometer.

Tips: you might have to repeat the process multiple times to reach the correct specification required for your lawn mower engine. So do not be surprised and just repeat the same technique until you reach the desired speed.

Step 3- Secure the Locknut after Engine & Exhaust are cooled enough:

Secure the Locknut after Engine & Exhaust are cooled enough

After that, wait until your engine and exhaust cool down.

Secure the Locknut after Engine & Exhaust are cooled enough 2

Once you are sure that both have cooled down and are no longer hot, secure the locknut to complete the adjustment procedure.

That’s the simplest and easiest way to fix your lawn mower no electrical power issue. But if your mower still cannot start and run due to lack of electrical power, I highly suggest and recommend to try this DIY method too.

Otherwise, the best alternative way of getting rid of your problem is to contact the nearest dealership or workshop for professional or expert assistance.

Warning:

Performing such troubleshooting or maintenance tasks can be hazardous. Thus, make sure you have enough knowledge to perform them. Remember to first read your mower’s instructions manual before operating, servicing, or troubleshooting it.

Watch this video.

Frequently Asked Questions

What causes my lawn mower not to get enough power?

The most common reasons behind such commotion are clogged air filter, blocked fuel filter, stale or contaminated gas, excess or too little engine oil, dirty or defective spark plug, clogged cutting deck, blocked carburetor, or a dull blade.

Why does nothing happen when I turn the key on my lawn mower?

If your lawn mower doesn’t do anything when you turn the key, it might be happening due to various internal flaws. So, you need to check the battery, ignition switch, fuse, brake switch, blade switch, solenoid posts, and coil.

Can I flood my lawn mower?

Yes, you can. Turn your mower over and clean the bottom of it or remove the blades while it contains gasoline. You can also flood your lawn mower by pushing the primer bulb to prime it several times.

What causes a lawn mower to shut off while mowing?

Your lawn mower can shut down abruptly while you are still mowing due to overuse and lack of proper regular maintenance.

What causes a lawn mower cut off when it gets hot?

Such commotion commonly arises due to an overheated engine, dirty air filter, worn-out pistons, clogged fuel system, air leaks, or the carburetor starving for enough gas.

Final Verdict

In the future, if you ever encounter similar low power or no power problem while running your lawn mower, try this DIY technique.  

Initially, the whole procedure might seem a bit complicated to perform, but with minimum mechanical expertise, you can easily fix the problem in no time. Remember, if you want the best outcome, you have to thoroughly follow all the instructions for troubleshooting a lawn mower that has no electrical power without skipping any detail.

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