Lawn Mower Ignition Switch 101: Everything You Need to Know

Introduction

The ignition switch is an essential component of a lawn mower, rider, or lawn tractor, controlling the power supply to the engine and other electrical parts. A properly functioning ignition switch is crucial for starting and stopping lawn mowers and tractors, and any issues with it can lead to frustrating breakdowns and delays in mowing your lawn. In this article, we will cover everything you need to know about lawn mower ignition switches, including common signs of a bad ignition switch, how to test and replace it, and why ignition switches get stuck.

Whether you're a lawn care professional or a weekend warrior, understanding the importance of a properly functioning ignition switch is crucial to ensure your lawn mower runs smoothly and efficiently. So, let's dive in and learn more about lawn mower ignition switches!

What is a Lawn Mower Ignition Switch?

A lawn mower ignition switch is a device that controls the flow of electricity from the battery to the engine's spark plug. When the key is turned to the "ON" position, the ignition switch sends power to the starter solenoid, which engages the starter motor to turn the engine over. Once the engine is running, the ignition switch sends power to the electrical system, including the alternator and accessories like lights and gauges.

There are a variety of different types of lawn mower ignition switches available, including key ignition switches and push-button ignition switches. Many popular lawn mower brands like Husqvarna and Briggs and Stratton offer their own OEM ignition switches, while there are also many aftermarket switches available to fit a range of brands like Ford/New Holland, John Deere, Scag, Cub Cadet, Exmark, Kohler, Craftsman and Toro.

Overall, a properly functioning lawn mower ignition switch is crucial for starting and stopping your lawn mower, so it's important to ensure that your switch is in good condition and properly maintained. In the next section, we will discuss the common signs of a bad ignition switch to watch out for.

Signs of a Bad Lawn Mower Ignition Switch

There are several common signs that your lawn mower ignition switch may be going bad, including:

• Engine fails to start: If you turn the key and nothing happens, or the engine cranks but doesn't start, it could be a sign of a faulty ignition switch.
• No power to accessories: If the engine starts but you don't have power to accessories like lights or gauges, it could be a sign of a bad ignition switch.
• Engine stalls: If the engine starts but then stalls out shortly after, it could be a sign of an ignition switch issue.
• Key won't turn: If the key won't turn or is difficult to turn, it could be a sign of a faulty ignition switch cylinder.
• Engine runs with key off: If the engine continues to run after you turn the key off, it could be a sign of a bad ignition switch.

If you notice any of these signs, it's important to have your ignition switch inspected and repaired as soon as possible. Ignoring a bad ignition switch can lead to more serious problems down the line, and could even result in your lawn mower not starting at all. In the next section, we will discuss how to test a lawn mower ignition switch to determine if it's the culprit.

How to Tell if it's Your Starter or Ignition Switch

If your lawn mower is having trouble starting, it can be difficult to determine whether the problem is with the ignition switch or the starter motor. Here are a few tips to help you diagnose the issue:

• Listen for clicking noises: If you turn the key in the ignition and hear a clicking noise but the engine does not turn over, this is a sign that the starter motor is not receiving enough power from the battery. This can be caused by a faulty ignition switch or a problem with the battery or starter motor.
• Check the battery: A weak or dead battery can also prevent the starter motor from receiving enough power to start the engine. Check the battery voltage with a multimeter and make sure it is fully charged.
• Test the starter motor: If the battery and ignition switch are both functioning properly, the problem may be with the starter motor itself. You can test the starter motor by using a voltmeter to check for power at the starter solenoid when the ignition key is turned.
• Consult a professional: If you're unsure of how to diagnose the problem or don't feel comfortable working on your lawn mower's electrical system, it's always best to consult a professional.

By following these tips, you can diagnose common issues with your lawn mower's starting system and take the necessary steps to address the problem promptly. Whether it's a faulty ignition switch or a problem with the starter motor or battery, getting your lawn mower up and running again will allow you to keep your lawn looking neat and tidy all season long.

Testing a Lawn Mower Ignition Switch

If you suspect that your lawn mower ignition switch may be the cause of your starting or power issues, there are several tests you can perform to determine if the switch is faulty. Here are a few common methods for testing a lawn mower ignition switch:

• Visual inspection: Start by performing a visual inspection of the switch, looking for signs of wear, damage, or loose connections. Check the wiring and connections to ensure that they are secure and free of corrosion or damage.
• Circuit testing: You can use a multimeter to test the continuity of the switch's circuits. This will help you determine if the switch is working properly and sending power to the appropriate components.
• Bench testing: If you've ruled out wiring issues or other problems, you can remove the ignition switch from the lawn mower and bench test it. This involves connecting the switch to a power source and a multimeter to check for proper function.

If your testing indicates that your lawn mower ignition switch is faulty, you may need to replace it. In the next section, we will discuss whether or not it's possible to fix your own ignition switch, or if it's best to leave it to the professionals.

Why Does the Ignition Switch Get Stuck?

If you're having trouble turning the key in your lawn mower's ignition switch, it can be frustrating and time-consuming. Here are some of the common reasons why ignition switches get stuck:

• Dirt and debris: Over time, dirt, dust, and debris can accumulate in and around the ignition switch, causing it to become clogged and difficult to turn.
• Worn or damaged key: If your lawn mower key is worn, bent, or damaged, it may not fit properly in the ignition switch, making it difficult to turn.
• Electrical problems: Faulty wiring or a malfunctioning solenoid can cause the ignition switch to become stuck.
• Corrosion: Corrosion can cause the key to become stuck in the ignition switch. This is a common problem in humid or rainy climates.
• Old age: Like all mechanical components, ignition switches can wear out over time. If your lawn mower is several years old, it may be time to replace the ignition switch.

If your ignition switch is stuck, try cleaning it with a soft brush and some compressed air to remove any dirt or debris. You can also try lubricating the key and the ignition switch with a small amount of graphite powder or silicone spray. If the problem persists, you may need to replace the ignition switch.

By understanding the common reasons why ignition switches get stuck, you can take the necessary steps to prevent this problem from occurring in the future. Whether it's keeping your lawn mower clean and free of debris or replacing old or worn keys and ignition switches, taking care of your lawn mower's ignition system will help ensure reliable and trouble-free operation for years to come.

Can You Fix Your Own Lawn Mower Ignition Switch?

Whether or not you can fix your own lawn mower ignition switch depends on your level of experience and comfort with small engine repair. If you're comfortable with basic electrical work and have access to the right tools, you may be able to replace the ignition switch yourself.

However, keep in mind that working with electrical components can be dangerous if you're not familiar with the proper safety precautions. If you're not confident in your abilities or are unsure about the extent of the problem, it's best to leave the repair to a professional.

Additionally, it's important to ensure that you're using the correct replacement part for your lawn mower make and model. Using an aftermarket switch that isn't designed for your specific lawn mower could cause further damage or even be dangerous.

If you do decide to replace your ignition switch yourself, be sure to follow the manufacturer's instructions carefully and take the necessary safety precautions. In the next section, we'll discuss the average cost of an ignition switch replacement, so you can weigh the costs and benefits of fixing the issue yourself versus hiring a professional.

Average Cost of Ignition Switch Replacement

The cost of replacing a lawn mower ignition switch can vary depending on several factors, including the make and model of your lawn mower and whether you choose an OEM or aftermarket switch.

On average, the cost of an OEM ignition switch can range from $20 to $50, while aftermarket switches can cost between $10 and $30. Keep in mind that installation costs may vary depending on whether you choose to do the replacement yourself or hire a professional.

If you're unsure about the extent of the problem or don't feel comfortable performing the repair yourself, it's always best to get a quote from a professional. They can assess the issue and provide you with an estimate for parts and labor.

In some cases, replacing the ignition switch may not be the only solution to your starting or power issues. If you've tested your ignition switch and it's functioning properly, you may need to consider other potential causes, such as a faulty starter or battery.

Regardless of the issue, it's always important to address any problems with your lawn mower's electrical system promptly to prevent further damage or safety hazards. By staying on top of maintenance and repairs, you can keep your lawn mower running smoothly for years to come.

How Long Do Ignition Switches Last?

The lifespan of an ignition switch can vary depending on the frequency of use, maintenance practices, and other factors such as weather conditions and storage methods.

On average, ignition switches can last anywhere from 2-10 years. With proper maintenance and care, you can prolong the life of your ignition switch and prevent premature failure. Regularly cleaning and lubricating the switch can help prevent dirt and debris buildup, which can cause the switch to malfunction.

Additionally, it's important to avoid using the ignition switch as a power switch for other accessories such as lights or audio systems. This can put additional strain on the switch and shorten its lifespan.

If you notice any signs of a faulty ignition switch such as difficulty starting your lawn mower or intermittent power issues, it's important to address the problem promptly to prevent further damage or safety hazards.

By staying on top of regular maintenance and promptly addressing any issues with your lawn mower's ignition switch, you can ensure that your lawn mower is running smoothly and safely for many years to come.

Conclusion

The ignition switch is a critical component of your lawn mower's electrical system, responsible for providing power to the starter motor and allowing you to start and stop your lawn mower as needed. When the ignition switch fails or malfunctions, it can lead to a range of problems, including difficulty starting your lawn mower or intermittent power issues.

Fortunately, replacing a faulty ignition switch is a relatively straightforward process, and there are a range of OEM and aftermarket options available to fit a variety of lawn mower brands and models. At My Parts Store, we pride ourselves on providing a wide variety of lawn mower ignition switches to fit different brands and models. While we do carry OEM switches for popular brands like Husqvarna and Briggs and Stratton, we also offer high-quality aftermarket switches that replaces brands like Ford/New Holland, John Deere, Scag, Cub Cadet, Exmark, Kohler, and Toro.

By following the steps outlined in this guide, you can troubleshoot and diagnose common issues with your lawn mower's ignition switch and take the necessary steps to replace or repair it as needed. Whether you choose to tackle the repair yourself or hire a professional, it's important to address any issues with your lawn mower's ignition switch promptly to prevent further damage or safety hazards.

With proper maintenance and care, your lawn mower's ignition switch can provide years of reliable use, allowing you to keep your lawn looking neat and tidy all season long.