Posts Tagged ‘spark plug’

How to Replace your Lawn Mower Spark Plug

March 28th, 2014

To improve the performance of your lawn mower, remember that the tires aren’t the only part of your mower that need occasional replacing. One way to prepare your lawn mower for spring is to replace the spark plug. The spark plug creates the spark to start the engine. If you have difficulty starting your lawn mower, you may need a new one. If it isn’t in top condition, the lawn mower will fail to perform efficiently. But this little maintenance taskĀ is simple if you follow the step-by-step process below.

To Clean or ReplaceĀ the Spark Plug

First, figure out if your spark plug really needs to be replaced, or if it just needs a good cleaning. If the spark plug is dirty or has a light rust, it needs to be cleaned. Spray it with break solution, let it sit for 10 minutes, and then use a wire brush to remove the loosened debris or rust.

If the spark plug is old or rusted beyond repair, it won’t be able to provide the spark to ignite the gasoline. That’s when you should replace it.

Steps to Replace a Lawn Mower Spark Plug

  1. With a spark socket, remove the spark plug wire and then remove the old plug.
  2. When the old spark plug is removed, clean the hole of any dirt or debris that has accumulated over time.
  3. Once the spark plug hole is cleaned out, twist the new plug in until the threads catch. With the socket, twist the new spark plug into the hole until it stops, then gently turn it another quarter turn.

Tips to Consider

You should use a spark socket that is specially designed for the body of spark plugs, because it won’t damage or break the casing. Before you purchase a new spark plug, check the dimensions of the spark plug hole and of the new spark plug to make sure it will fit. And when you twist in the new spark plug, be careful not to overturn and break the plug; or turn it too tightly so it’s impossible to remove when you have to replace it.