How Often Should Lawn Mower Spark Plugs Be Changed?

One of the most common maintenance tasks for a lawnmower is changing out spark plugs.

Spark plugs are necessary to ignite the fuel, and when they’re not working properly, your engine will sputter and eventually stop running.

In this blog post, we’ll discuss how often you should change out your spark plug so that you can get the best performance from your machine!

How often should lawn mower spark plugs be changed?

In general, you should change your lawnmower’s spark plugs at the start of every season or after 25 hours of use – whichever comes first.

There is also a strong chance that they may be the culprit if your mower won’t start.

Why do sparkplugs need to be changed?

To generate a strong spark, the electrodes on a spark plug must be clean and sharp. The more worn or filthy your spark plugs are, the more voltage and strain it takes to produce a good spark.

A faulty spark plug is a possibility if your engine hasn’t lately been tuned. It won’t start or you have to pull hard on the rewind to get it going, suggesting a faulty spark plug. Excessive fuel use, deposits on the cylinder head, and oil dilution can also be caused by these problems.

How do you replace a sparkplug in a lawnmower?

If you find yourself in a position where you need to replace your mowers spark plug, follow the steps below:

1. Find out which spark plug(s) to use, as well as gap setting adjustments.
2. Disconnect the connection lead.
3. Remove the spark plug with a spark plug socket.
4. Replace with your new plug, but don’t over-tighten it (15 ft. lbs. MAXIMUM)
5. Re-attach the spark plug lead.

Of course, if you would rather leave it to the pros, Sod Depot can take care of this and all of your lawnmower maintenance for you!