What Causes a Lawn Mower Coil to Fail? Investigate Now.

A lawn mower coil can go bad due to age, heat, or moisture exposure. When the coil loses its ability to produce a spark, it will affect the mower’s performance and prevent it from starting.

Lawn mowers are an essential tool for homeowners and professionals to keep their landscapes in pristine condition. However, when the coil inside the lawn mower fails, it can be frustrating and time-consuming to fix. The ignition coil is a crucial component of the lawn mower’s engine, responsible for producing the electrical charge that ignites the fuel in the combustion chamber.

The coil consists of a wire and a metal core, and it can go bad due to various factors like age, heat, or exposure to moisture. When the coil fails, it affects the engine’s performance, and the lawn mower won’t start. In this article, we will discuss the reasons why a lawn mower coil goes bad, its symptoms, and the steps to fix it.

What Causes a Lawn Mower Coil to Fail? Investigate Now.

Credit: en.wikipedia.org

Understanding Lawn Mower Coils

A lawn mower coil is an electrical component responsible for creating the spark required to ignite fuel. It operates by converting low voltage from the battery into high voltage needed for the spark plug. This high voltage is sent to the spark plug via the coil’s secondary winding, which is wrapped around the primary winding.

The spark plug connects to the secondary winding via a wire. The coil plays a vital role in powering a lawn mower by ensuring the engine runs smoothly. However, with time, a lawn mower coil may fail due to various reasons, including wear and tear, overheating, and corrosion.

Depending on the severity of the damage, a faulty coil may cause the engine to produce less power or fail to start altogether.

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Signs Of A Failing Lawn Mower Coil

A lawn mower coil may fail due to various reasons, but if you can detect the early signs of failure, you can prevent severe damage. Common symptoms of coil failure are the engine not starting, frequent stalling, and low power issues.

To diagnose coil problems, a multimeter test is needed. This will determine if the coil is delivering the correct level of voltage. Early detection and repair of a failing coil is crucial for the proper operation of a lawnmower. It is recommended to check the ignition system and coil regularly to avoid potential damage to the mower’s engine.

Don’t take these warning signs lightly; investigate the issue as soon as possible. Failure to act on early warnings can lead to more significant issues down the road.

Causes Of Lawn Mower Coil Failure

The lawn mower coil is an integral component that ignites the engine. Several factors can cause the lawn mower’s coil to fail. Overheating is one of the primary reasons that cause a coil to break down. With continuous use, the high temperature can lead to thermal breakdown that affects the coil.

Wear and tear over time can also lead to coil malfunction. Moisture can lead to corrosion and damage to the coil. Incorrect installation or infrequent maintenance of the mower can also cause coil failure. More troubling, using the wrong fuel or oil type can lead to coil damage.

Understanding the causes and taking preventive measures can help prolong the lifespan of a lawn mower coil.

Preventing Lawn Mower Coil Failure

Lawn mower coil failure can be frustrating, but preventive measures can be taken to reduce the likelihood of it occurring. Regular maintenance and cleaning are important for keeping the coil in optimal condition. Additionally, using the right fuel and oil can prolong the life of the coil.

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Proper storage techniques, such as storing the mower in a dry and cool place, can also prevent damage to the coil. Addressing issues promptly and fixing any problems before they worsen is a good practice. By following these simple guidelines, you can keep your lawn mower coil working efficiently and avoid the hassle of frequent repairs and replacements.

Repairing Or Replacing A Faulty Lawn Mower Coil

A lawn mower coil may fail due to a variety of reasons, including wear and tear, damaged wiring, and voltage issues. In some cases, repairing the coil may be an option, while in others, replacing it entirely may be the solution.

The cost of repair versus replacement depends on several factors, including the extent of the damage, the age of the mower, and the availability of replacement parts. Diy repairs can be cost-effective, but hiring a professional ensures that the work is done correctly.

Proper installation and calibration are crucial for the coil to function correctly and avoid further damage. Failing to address the problem promptly can lead to more significant issues, such as engine failure and costly repairs.


Now that we understand the importance of a functioning lawn mower coil, it is critical to know the reasons why they go bad. Dirty air filters, corroded spark plug wires, and excessive moisture are some of the most prevalent causes of a defective lawn mower coil.

If left untreated, a bad coil can lead to stalling engines, decreased fuel efficiency, and even permanent damage to the machine. Regular maintenance and cleaning of the mower’s components can help prevent coil failure and extend the lifespan of your lawn mower.

A well-functioning lawn mower is key to maintaining a beautiful and healthy yard. By keeping an eye out for any signs of a bad coil such as difficulty starting or rough idling, you can quickly remedy the issue and be back to mowing in no time.

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With these tips, your lawn mower will remain a reliable and productive tool for years to come.