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Has your mower lost its Spark?

Spark plugs play a pivotal role in the ignition process. If they are worn or dirty, your engine won’t start, or you’ll have to try many times to fire it up. Spark plugs are inexpensive and easy to clean, so if a damaged spark plug is your problem, you’re in luck.

Spark plugs should be checked regularly during your standard mower maintenance routine. They may need to be checked or replaced:

  • Once each season.
  • After 25 hours of use.
  • If your lawn mower or outdoor power equipment won’t start.

With the steps below, you should be prepared and able to check and change a spark plug yourself.

Time to roll up your sleeves and get to work!

How to Check for a Fouled or Damaged Spark Plug

  • Disconnect the spark plug lead. Clean the area around the spark plug.
  • Remove the spark plug with a spark plug socket.
  • Clean the plug with a wire brush and in a well-ventilated space spray-on plug cleaner. Never clean a spark plug with a shot blaster or abrasives.
  • Inspect the spark plug for deposits, cracks or burns. If these exist, replace the spark plug.
  • Check the spark plug gap and adjust, if necessary.
  • Replace the plug, re-attach the spark plug lead and start your engine.
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