Jul 26, 2016 Need to replace the spool on your single-line BLACK+DECKER string trimmer? Check out this quick video for tips and tricks. Black+Decker 20V Cordless String Weed Trimmer Edger LSTE525. This 20V MAX. trimmer/edger is lightweight and a breeze to use. It cuts through weedy overgrowth and cleanly edges borders in no time. Its high-torque transmission gives you plenty of cutting power right at the string, and it automatically feeds trimmer line without bumping – so nothing slows you down.
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Written by Chris Deziel; Updated December 17, 2018Related Articles
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Unlike most other string trimmer manufacturers, Black & Decker doesn't offer a gasoline-powered model, and its lightweight corded and cordless models are intended primarily for home use. When the string runs out, you have two options: You can replace the entire trimmer head with a pre-strung one or you can re-string the empty spool yourself. If you choose to re-string the spool, you'll need 0.065-inch trimmer line -- heavier line won't advance properly, and the machine could suffer damage if you use it.
Unplug the trimmer or remove the battery. Sit on a bench, turn the trimmer over and hold the shaft with your legs to stabilize it.
Remove the cap from the trimmer head by depressing the two tabs on the sides with your fingers and lifting it off. Lift out the spool and pull off all the old string.
Prepare a length of 0.065-inch monofilament string that is 20 feet long, using a tape measure to measure its length and a pair of scissors to cut it from a roll.
Insert one end of the string in one of the two holes in the hub of the spool and wind the string in the direction of the arrow imprinted on the top of the spool.
Stop winding when you have about 6 inches of string left on the end. Hook the string into one of the two notches on the rim of the spool.
Replace the spool into the trimmer head, feeding the end of the string through the hole in the side of the head as you do. Set the spool on the pinion and rotate it until it seats properly.
Set the cap back on top of the head and push down to lock it in place.
0.065-inch monofilament string, 20 feet
Tape measure
Scissors
Things You Will Need
Tip
If you need extra cutting power for tough weeds, use 0.065-inch braided string instead of smooth string.
Warning
You can move the guard to make replacing the string easier, but if you do, make sure it's back in its proper position before you use the trimmer.
References (2)
About the Author
Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. As a landscape builder, he helped establish two gardening companies.
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