Question about Black & Decker String Trimmer Cordless 12" 18V

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We have a cordless hedgehog trimmer. When the trimmer is first turned on, it will run for approximately 15 seconds, then the power slows way down. The line still turns, but very slowly. We checked the battery in other 18V B & D items and it works fine

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  • Trinketsaj Jun 28, 2008

    yes i have the same problem



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Posted on Jan 02, 2017


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It sounds like a defective switch (part number 243614-00). You can order it at: for about $5 plus shipping.

Posted on Jul 09, 2007

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SOURCE: Trimmer won't run - B&D CST2000

could be loose connection in the motor due to vibration.

Posted on Jul 09, 2008

  • 4 Answers

SOURCE: 18v cordless string trimmer will not stop feeding line

Some of the trimmers recommend a certain size line, if you have one of these that let line out as needed, the speed at which the trimmer cuts will let out line as needed. If you have too small of line the drag for the friction let-out you will spoll all the line out. Make sure the line is the right size, They come in alot of sizes, anywhere from .060" to .125" line thickness so make sure you have the right size line!

Posted on Aug 07, 2008

  • 36 Answers

SOURCE: grass hog 18v nst2018 trimmer

After reading all of the reviews on, it seems these batteries require charging and discharging 3-5 times before they hold a full charge.

All of the reviews mentioned this; they said it lasted 5-10 mins the first few times, but then they suddenly got 30-50 mins per charge after the 3rd to 5th charging.

Posted on Sep 19, 2009

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