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String Trimmer Head Won't Spin

The 4 most common part(s) or condition(s) which cause the symptom String trimmer head won't spin are listed below starting with the most likely. Check or test each item and watch any available videos.


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To see parts for your string trimmer, you need to enter your model number on the right. The system will then display parts that are associated with your string trimmer.

Clutch

If the string trimmer head won't spin the clutch assembly might be worn out. The clutch assembly is located near the engine at the end of the trimmer shaft. It is sometimes possible to clean and repair the clutch assembly, but given the relatively low cost and the difficulty of the repair, it may be easier to simply replace the entire clutch assembly.

Enter your model number for the best repair help results:


What is a model number, and where do I find it?

To see parts for your string trimmer, you need to enter your model number on the right. The system will then display parts that are associated with your string trimmer.

Drive Shaft

If the string trimmer head won't spin the drive shaft might be broken. The drive shaft is a long, flexible shaft which connects the clutch to the trimmer head. The shaft spins inside the trimmer tube at the same speed as the head. Over time the shaft can wear out and break. It's not possible to repair it. If the drive shaft has broken it will need to be replaced.

Enter your model number for the best repair help results:


What is a model number, and where do I find it?

To see parts for your string trimmer, you need to enter your model number on the right. The system will then display parts that are associated with your string trimmer.

Trimmer Head

If the string trimmer head won't spin the head may have separated from the drive shaft. Disassemble the head to determine the cause.

Enter your model number for the best repair help results:


What is a model number, and where do I find it?

To see parts for your string trimmer, you need to enter your model number on the right. The system will then display parts that are associated with your string trimmer.

Throttle Cable

If the string trimmer head won't spin the throttle cable might be broken. The throttle cable connects the throttle trigger to the carburetor.

Enter your model number for the best repair help results:


What is a model number, and where do I find it?

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