NGK Spark Plug (BPR4ES)
Grid is 1 inch square
  Spark Plug 6578
  Spark Plug 6578
  Spark Plug 6578
  Spark Plug 6578

Spark Plug 6578

Genuine OEM Part # 6578RC Item # 1621514Alternative Part Number(s)
NGK Spark Plug (BPR4ES)
Grid is 1 inch square
  Spark Plug 6578
  Spark Plug 6578
  Spark Plug 6578
  Spark Plug 6578
$3.85
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NGK Spark Plug (BPR4ES)
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$3.85

This part 6578 is compatible with:

Product Type:
Lawn Mower, Small Engine
Brands:
Stihl, Toro, Tecumseh, Lawn Boy, Kawasaki

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Spark Plug Customer Reviews

Common Problems Fixed by the Spark Plug

Based on customer reports and repair data, this part commonly fixes these issues:

About the Spark Plug

Inspect the spark plug for signs of wear or damage. If the porcelain insulator is cracked, an electrode is burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. To determine if the spark plug is defective, use a spark plug tester. You should see a strong spark between the tester’s terminals when the engine is cranking. If there is no spark, this indicates that the spark plug is defective and should be replaced.

Popular models

Alternative Part Number(s)

Replaces Part Number 130-938
Replaces Part Number 92070-2112
Replaces Part Number 92070-7004
Replaces Part Number BPR4ES
Replaces Part Number 21536100
Replaces Part Number 7222
Replaces Part Number 6578
Replaces Part Number 21547800