The coil part will not look right, or the sparkler is to close/far away from the hook part.
Could be a faulty spark plug or spark plug wire.
Could be a faulty spark plug or spark plug wire.
A cylinder misfire could be from a bad spark plug, bad spark plug wire, or a bad coil. It could also be caused by a plugged or faulty fuel injector.
Could be bad dist. cap or rotor
Probably losing spark in that one cylinder, maybe a faulty spark plug, a spark plug wire or distributor cap.
could be a faulty fuel injector
Buy a new one - replace it!!
Most likely a bad spark plug or an ignition wire (spark plug wire) that is breaking down and not letting electrical charge reach the plug. Could also be a faulty fuel injector.
Your weed eater spark plug may not be firing due to issues such as a dirty or faulty spark plug, a disconnected or damaged spark plug wire, or a problem with the ignition system. It is important to check and replace the spark plug if needed, ensure the spark plug wire is connected properly, and troubleshoot the ignition system to resolve the issue.
Dirty jets in the carb or dirty fuel line or faulty spark (plug or distributor)...
Faulty plug lead, and/or distributor cap,if applicable
If you have access to a spark tester, use it. Otherwise, remove the spark plug, reconnect it to the spark plug wire, and rest the tip or threads on a good engine ground, AWAY from the spark plug hole. Attempt to start it, and watch for spark. If none, replace the spark plug and try again. If still no spark, the magneto coil may be faulty.