• STIHL Stanmore

How to Change the Nylon Cord on Your Grass Trimmer

Replacing the nylon cord on your grass trimmer is a maintenance task that simply cannot be avoided. There is, however, absolutely no need to feel intimidated by the process - it truly is surprisingly simple. Once you've completed the replacement for the first time, you'll find it easy to repeat in the future.

Changing the Cord on a Single-Line Trimmer

1. Prepare the line.

The length and width of line you need will vary based on your trimmer. If you purchase the wrong width of line, the trimmer will not function properly. Should you need some advice on the size of cord you need to use, simply check online or give STIHL Stanmore's friendly team a quick call.

The length to which the cord should be cut also varies from one trimmer to the next. Usually, this is anywhere between 10 and 25 inches. If you're unsure of the exact length, opt for a longer piece of nylon cord - it can always be trimmed later on.

2. Make sure your trimmer’s engine is turned off.

To make sure that there are no accidents, make sure to turn off and unplug the trimmer. If the trimmer has a gearbox, you'll want to make sure it is cooled down completely before being handled.

3. Remove the retaining cap from the trimmer head.

To remove the retaining cap you will need to either unscrew it or skillfully press a few release tabs. Different grass trimmer models will have different mechanisms for removing the spool. It should be easy enough to figure out the removal process, but feel free to call our team for advice if you get stuck.

4. Locate the starter hole in the spool.

Insert the tip of the nylon cord and wind in the appropriate direction. Be sure to wrap the cord in straight, neat rows to avoid unnecessary jamming during use. When there are only 5 inches of line left over, snap the cord into the spool's retainer to keep it held in place.

Changing the Cord on a Double-Line Trimmer
Follow steps 1, 2, and 3 as above.

4. Locate the starter hole in the spool.

Insert the tip of the nylon cord and wind in the appropriate direction. Be sure to wrap the cord in straight, neat rows to avoid unnecessary jamming during use. When there are only 5 inches of line left over, snap the cord into the spool's retainer to keep it held in place.

Repeat the process with the second line. The cord ends should be at opposite sides of the spool, matching the eyelets on the outside of the trimmer head.

5. Remove the lines from the retainers.

Thread the cords through the eyelets on the outside of the trimmer head. Make sure the cords are feeding smoothly by replacing the spool into the trimmer head, and pulling the cords through through the slot.

Changing the Cord on a Speed-Feed Trimmer
Follow steps 1 and 2 as above.
3. Rotate the cap to get the arrows to align with the eyelets.
Once the arrows are properly aligned, you should be able to see light through the eyelets.
4. Thread the end of the trimmer line through one eyelet.
If properly threaded, the trimmer cord should come through the eyelet on the opposite side of the trimmer head. Hold the ends of the cord together and pull to make both sides even. Turn the head clockwise until approximately 5 inches of line are exposed.

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