NGK Spark Plug (B5HS)
Grid is 1 inch square
  Spark Plug 3722
  Spark Plug 3722

Spark Plug 3722

Genuine OEM Part # 3722RC Item # 1863419Alternative Part Number(s)
NGK Spark Plug (B5HS)
Grid is 1 inch square
  Spark Plug 3722
  Spark Plug 3722
$4.74
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NGK Spark Plug (B5HS)
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$4.74

This part 3722 is compatible with:

Product Type:
Lawn Mower, String Trimmer
Brands:
Craftsman, Lawn Boy

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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.

Alternative Part Number(s)

Replaces Part Number 4210