Kobalt KST 4040X-06 User Manual (English)

Questions and Answers:

A
Adrienne SmithAug 7, 2025
Why does my Kobalt KST 4040X-06 motor fail to start?
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  Jane LongAug 8, 2025
  If the Kobalt Trimmer motor doesn't start when you press the switch trigger, there could be a few reasons. First, check that the battery is securely in place, ensuring the latches on the battery compartment snap into place. Another possibility is that the battery isn't charged, so charge it following the instructions that came with your model. If these steps don't work, there might be a wiring or electrical contact issue, so call 1-888-3KOBALT (1-888-356-2258) for technical service.
C
Courtney AndersonAug 17, 2025
What to do if Kobalt Trimmer head will not advance line?
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  Joshua DixonAug 17, 2025
  If the Kobalt Trimmer head won't advance the line, it could be due to several reasons. First, stop the trimmer, remove the battery, and check if the motor shaft or trimmer head is bound with grass, and remove any grass. Also, the spool may not have enough line, so remove the battery and replace the trimmer line. In addition, a dirty trimmer head could be the culprit, so remove the battery and clean the spool. Lastly, the line might be tangled on the spool; in this case, remove the battery, take the line off the spool, and rewind it.
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Allen GilmoreAug 26, 2025
How to fix Kobalt KST 4040X-06 line not cutting well?
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  Larry FrancisAug 26, 2025
  If the line on your Kobalt Trimmer isn't cutting well, it could be that the cutting blade on the guard has become dull. You can sharpen the cutting blade with a file or replace it with a new blade.

Kobalt KST 4040X-06 Specifications

General

Type	String Trimmer
Voltage	40V
Battery Type	Lithium-Ion
Runtime	45 minutes
Line Feed	Automatic
Attachment Capable	No
Battery Included	Yes
Charger Included	Yes
Cutting Width	13-in
Line Diameter	0.080 inches
Cutting Path	13-in