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How to Replace Bump Feed Spool

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Even the best lawn trimmers will eventually need new string. Doing this kind of maintenance can be intimidating for some people, but replacing the string on a trimmer is not difficult. With a little help, it won't be long before you're out trimming your lawn once more.

  1. 1

    Prepare the line. The length and width of line you need varies based on your trimmer.[1] [2] If you purchase the wrong width of line, the trimmer will not work correctly, so don't waste your money by simply guessing at the hardware store. If you are not sure what size line your trimmer uses, check online—the manufacturer's website often has instructions, and if not the customer service department should be able to help you.The length to which the line should be cut also varies, from around 10' to 25'.[3] [4] If you are not sure, err on the side of too long; you can always cut it shorter later.

  2. 2

    Make sure your trimmer's engine is turned off. If it has a gearbox, make sure it is cooled down. This will help prevent accidents.

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  3. 3

    Remove the retaining cap from the trimmer head. This will probably involve either unscrewing it, pressing one or multiple tabs, or a combination of the two.[5] Some models use different mechanisms for removing the spool. These should be designed to be relatively intuitive, but contact your trimmer's manufacturer if you are having trouble figuring it out.

  4. 4

    Locate the starter hole in the spool. Insert the tip of the trimmer line, and wind in the direction of the arrows.[6] Wrap the line in neat, straight rows, to prevent jams later on. When there are about 5" or 6" of line remaining, snap it into the retainer on the spool to hold it in place.[7] [8]

  5. 5

    Line up the retainer with the slot on the outside of the head. Replace the spool into the trimmer head. Remove the line from the retainer, and pull it through the slot to make sure it is feeding smoothly.[9] [10] Reattach the retaining cap.

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  1. 1

    Prepare the line. The length and width of line you need varies based on your trimmer.[11] [12] If you purchase the wrong width of line, the trimmer will not work correctly, so don't waste your money by simply guessing at the hardware store. If you are not sure what size line your trimmer uses, check online—the manufacturer's website often has instructions, and if not the customer service department should be able to help you.The length to which the line should be cut also varies, from around 10' to 25'.[13] [14] If you are not sure, err on the side of too long; you can always cut it shorter later.

  2. 2

    Make sure your trimmer's engine is turned off. If it has a gearbox, make sure it is cooled down. This will help prevent accidents.

  3. 3

    Remove the retaining cap from the trimmer head. This will probably involve either unscrewing it, pressing one or multiple tabs, or a combination of the two.[15] Some models use different mechanisms for removing the spool. These should be designed to be relatively intuitive, but contact your trimmer's manufacturer if you are having trouble figuring it out.

  4. 4

    Locate the starter holes in the spool. Insert the tip of the first length of trimmer line into one starter hole, and wind in the direction of the arrows.[16] Wrap the line in neat, straight rows, to prevent jams later on. When there are about 5" or 6" of line remaining, snap it into the retainer on the spool to hold it in place.[17] [18] Repeat this process with the second line. At this point, the line ends should be at opposite sides of the spool, to match the eyelets on the outside of the trimmer head.[19]

  5. 5

    Remove the lines from the retainers. Thread them through the eyelets on the outside of the trimmer head. Replace the spool into the trimmer head, and pull the lines through the slot to make sure they are feeding smoothly.[20] [21] Reattach the retaining cap.

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  1. 1

    Prepare the line. The length and width of line you need varies based on your trimmer.[22] [23] If you purchase the wrong width of line, the trimmer will not work correctly, so don't waste your money by simply guessing at the hardware store. If you are not sure what size line your trimmer uses, check online—the manufacturer's website often has instructions, and if not the customer service department should be able to help you.The length to which the lines should be cut also varies, from around 10' to 25'.[24] [25] If you are not sure, err on the side of too long; you can always cut it shorter later. Both lines should be cut to the same length.

  2. 2

    Make sure your trimmer's engine is turned off. If it has a gearbox, make sure it is cooled down. This will help prevent accidents.

  3. 3

    Rotate the cap so the arrows align with the eyelets. You should be able to see light through the head when you look through the eyelets.[26]

  4. 4

    Thread the end of the trimmer line through one eyelet. It should come through the eyelet on the other side of the trimmer head. Hold the ends together and pull to make both sides even. Twist the head clockwise until 5" or 6" of line are exposed.

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Add New Question

  • Question

    Do you put the cable on clockwise?

    Community Answer

    There is an arrow on the spool to show you the direction in which to wind the line.

  • Question

    My weed eater has two slots on the head to thread pieces of string through. I can't get string to go inside one of the slots. What can I do?

    Community Answer

    Check the size of the slots closely. They're different sizes; select the one appropriate for your size of line.

  • Question

    What do I do if I can't remove the spool on my weed eater trimmer?

    Community Answer

    There are two methods used to mount the spool: 1. Tabs, as noted in this wiki, and 2. Screwed on, with threading going the opposite direction of operational spin.

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  • If you have a single- or double-line trimmer, disassembling the head is a good opportunity to clean it out. Wipe it clean with a soft rag.[27]

  • This may also be a good time to apply lube to relevant parts. This will vary depending on your trimmer, but the spool or bearing may need to be lubricated.[28]

  • If you are having difficulty threading the cutting line into the starter hole in the spool, try cutting the tips at an angle.

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Article Summary X

Before you change the string on a lawn trimmer, make sure your trimmer is turned off and that the engine is cool to the touch to avoid any injuries. Check on the manufacturer's website to see what kind of line you need and cut it to the correct length. Then, remove the retaining cap from the trimmer head and locate the start of the trimmer line spool. Start inserting your new line by wrapping it in neat, straight rows to avoid jams. Finally, line up the retainer with the slot on the outside of the head and reattach your retaining cap. To learn how to change the line on a double-line trimmer, scroll down.

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Source: https://www.wikihow.com/Change-the-String-on-a-Lawn-Trimmer

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