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Small Engine Spark Plug - How it Works & Installation Tips

This video provides general information on small engine spark plugs and general installation guidelines.

Small Engine

FG110A

FG110AT

FG110K1AT

FS 56

String trimmer won't start

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.

String trimmer runs rough

Edger won't start

The spark plug ignites the fuel and air mixture in the engine's cylinder to power the engine. If the spark plug is defective, the engine may not start. To determine if the spark plug is defective, remove the spark plug and inspect it. If the porcelain insulator is cracked, an electrode has been burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. Alternatively, if the spark plug hasn’t been replaced in a few seasons, replace it.

Edger runs rough

The spark plug ignites the fuel and air mixture in the engine's cylinder to power the engine. If the spark plug is defective, the engine may run roughly. To determine if the spark plug is defective, remove the spark plug and inspect it. If the porcelain insulator is cracked, an electrode has been burned away or damaged, or there is heavy carbon buildup at the electrode, replace the spark plug. Alternatively, if the spark plug hasn’t been replaced in a few seasons, replace it.

Small engine hard to start

Small engine runs poorly

Small engine won't start

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Spark Plug

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Top Reasons Tiller Engine Runs Poorly  — Tiller Troubleshooting

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Top Reasons Tiller Engine Leaks Gas  — Tiller Troubleshooting

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Spark-Plug

3365 Spark Plug | Ships Today! 30-Day Returns

3365 Spark Plug

This part 3365 is compatible with:

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String trimmer won't start

Edger won't start

Small engine won't start

Small engine hard to start

Small engine runs poorly

String trimmer runs rough

Edger runs rough

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