John Deere Spark Plug Maintenance

For smooth and efficient running, your John Deere's spark plug must be maintained.  To complete the following steps you will need a wrench with spark plug socket and feeler gauge.

  • make sure engine is cool and key is removed
  • remove spark plug wire
  • use spark plug socket to remove spark plug
  • discard foul plug and install a new one (if dirty, cracked, and/or broken)
  • use operator's manual to adjust new plug gap
  • tighten the spark plug in place and reattach the spark plug wire
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