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

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Black & Decker Grass Hog Electric Trimmer

The automatic feed for the trimmer line is no longer working. I have replaced the trimmer spool with a new B & D spool ( I was replacing my own line) but the auto feed still does not work. Please advise. Thanks

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  • Stephanni Taylor
    Stephanni Taylor May 14, 2008

    Having the same problem with mine, so far I cannot find a solution.

  • popish May 23, 2008

    Sometimes it works and sometimes it doesn't. When I press the button the spool rotates and cuts grass for about 10 seconds then stops. checked all connections, even took it apart and found no loose wires.

  • Linefeeder Jun 10, 2008

    Thanks hammer drill! I bought a new lever release for the spool and I'm no longer manually feeding line.

  • jmitton Jul 05, 2008

    My auto feed no no longer works. I went so far as to buy a new trimmer which worked well for a while but now has the same problem.

  • mompy Jul 27, 2008

    Where do you buy the lever release??

  • wfhenderson Aug 03, 2008

    I have exactly the opposite problem. Mine will not stop feedling line. I have disassembled the head and it is clean inside and the white arm moves freely, When turning the spool by hand the cogs seem to lock in place and the spool turns in unison with the shaft. But as soon as I apply power, it begins feeding and cutting its line without stop.

  • Anonymous Aug 29, 2008

    The machine overheats the line actually melt together and won't automatic feed. This is my second one with the same problem

  • Anonymous Aug 30, 2008

    what hold the reel in side

  • Anonymous Apr 11, 2009

    automatic feed does not work

  • Anonymous Apr 12, 2009

    Same same. Line feed is inconsistant. Very annoying and unproductive.

  • Ken Smith Jul 27, 2013

    Mine over feeds line and I have check the connections. It is very costly to use these spools!

  • Nina Ward
    Nina Ward Nov 09, 2013

    same problem. I've tried everything. Very Frustrating.

  • Anonymous Mar 21, 2014

    have tried replacing spool, cleaning inside, etc etc



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How do you replace the white lever, and how do you know if it is broken?

Posted on Jul 14, 2008

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I had this problem too, but it had nothing to do with the white lever. I finally found the solution in a clue about the line. Black & Decker line on the pre-wound spools is silicone lubricated. I tried spraying my line with WD-40, but that didn't help.

Here's what works: Talcum powder.

You can get it anywhere, usually labeled as baby powder, but make sure that it is talc, not corn starch baby powder.

I spread the sides of the bulk spool enough to shake the power in, maybe two teaspoons or less around the coiled line, then put it in a zipper plastic bag and shook ti to thoroughly coat the line.

Before loading the B&D spool, I rubbed a little more talc inside it, then wound the line.

It worked flawlessly!

Posted on Aug 20, 2008

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The problem is the white lever may be broken. its located at the bakc of the spool line,

Posted on Jun 01, 2008

  • Toni Rust May 31, 2013

    The white lever in mine is broken too! Where can you get one to replace it and does that make the line feed constantly when it is broken?

  • Brandon
    Brandon Apr 01, 2014

    yes it can. there are tons of online vendors simply search for your model number replacement parts.


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Yes! the previous answer is the correct one! I had generic silicone spray which did the job quite nicely.

Posted on Sep 29, 2011

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