How Long Do Small Engine Spark Plugs Last?

Small engine spark plugs can last a very long time, especially if the engine receives regular maintenance and care. My personal experience has shown that some lawnmowers have never worn out their spark plugs in years. While they may require periodic removal and cleaning, the actual spark plugs can last much longer than one might expect.

Till They Malfunction

Spark plugs do eventually need to be replaced, but this is often due to malfunction rather than routine wear and tear. When they start to fail, it can waste both time and money, as a freshly cleaned and properly gapped plug is essential for efficient performance. If you need to replace a spark plug, it is useful to change one every so often just to see what a new one looks like, ensuring you have a spare within reach in case of an emergency.

Proper Maintenance is Key

For optimal performance, it is crucial to keep your spark plugs in top condition. This includes ensuring that they are the correct make and part number for your specific engine. Some spark plugs have been known to function perfectly for up to 20 years, untouched and ready to perform. To ensure longevity, it is essential to handle them with care, starting the threads correctly and avoiding over-tightening. Always use the manufacturer's recommended gap setting and tools, such as a ring type or wire-type gapper, to set the spark plug gap accurately.

Personal Experience with Spark Plugs

From personal experience, I have seen the same spark plugs last for over ten years in several mower engines. Proper care and maintenance of the engine can greatly extend the life of the spark plugs. Regular cleaning and inspection can help to identify any issues early on, ensuring that your small engine runs smoothly and efficiently.

Most small engines do not see the intense use that car engines do, which contributes to their longer lifespan. The ease of access to spark plugs allows for regular inspection and maintenance, which is crucial for performance and longevity. By keeping spare spark plugs on hand and being mindful of their condition, you can avoid unexpected breakdowns and ensure that your small engine continues to function at its best.

Conclusion

Small engine spark plugs can last a very long time, often running for over a decade, provided they are maintained correctly. Regular cleaning, proper gapping, and careful handling are key to ensuring that your spark plugs continue to function effectively. Whether it's a lawnmower or any other small engine, taking the time to maintain these components will pay off in terms of both performance and cost savings.