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Skill Level
$3.91
Skill Level
Does this part fit my product?
NGK Spark Plug (BMR6A)
$3.91
This part 7421 is compatible with:
- Product Type:
- Lawn Mower, Small Engine, Snowblower, Tiller, String Trimmer, Leaf Blower, Hedge Trimmer, Chainsaw, Wood Chipper
- Brands:
- Stihl, Toro, Echo, Wheel Horse, Tecumseh, MTD, Shindaiwa, Kawasaki
Related Articles & Videos
03:17
Troubleshooting
Top Reasons Small Engine Won't Start — Small Engine Troubleshooting
Frequently Bought with Spark Plug
Spark Plug Customer Reviews
Common Problems Fixed by the Spark Plug
Based on customer reports and repair data, this part commonly fixes these issues:
Very Likely
Lawn mower won't start
Very Likely
Chainsaw won't start
Very Likely
Snowblower runs rough
Very Likely
Snowblower won't start
Very Likely
String trimmer won't start
Very Likely
Small engine won't start
Very Likely
Leaf blower won't start
Very Likely
Hedge trimmer won't start
Very Likely
Small engine hard to start
Very Likely
Lawn mower starts then stalls
Very Likely
Lawn mower is hard to start
Likely
Small engine runs poorly
Likely
Lawn mower runs rough
Likely
Snowblower starts then stalls
Likely
String trimmer runs rough
Likely
Leaf blower running rough
Likely
Hedge trimmer runs rough
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
Shop by Brands
MTD Lawn Mower PartsToro Lawn Mower PartsEcho Lawn Mower PartsWheel Horse Lawn Mower PartsKawasaki Small Engine PartsMTD Small Engine PartsTecumseh Small Engine PartsToro Small Engine PartsMTD Snowblower PartsToro Snowblower PartsEcho Snowblower Parts
Repair Help by Brands and Product Type
Alternative Part Number(s)
Replaces Part Number 130-799
Replaces Part Number 311509-8410A
Replaces Part Number 314401-8410A
Replaces Part Number 314401-8410B
Replaces Part Number 314493-8410A
Replaces Part Number 4002
Replaces Part Number 6021
Replaces Part Number 92070-2051
Replaces Part Number 92070-2059
Replaces Part Number 92070-2060
Replaces Part Number BM6
Replaces Part Number BM6A
Replaces Part Number BMR6A
Replaces Part Number 5921
Replaces Part Number 15901000330
Replaces Part Number 101102000
Replaces Part Number 15902603930
Replaces Part Number 370000030