How to Replace the Pull Cord on a Stihl KM 56 RC Trimmer
Replacing a Broken Trimmer Rope
It never fails: Just as you are about to tackle some yard work on a Saturday morning, the pull cord on your Stihl trimmer breaks. Now you're stuck replacing a pull cord rope adding another hour to your yard work and losing an hour of your day off. How are you supposed to relax on the weekend if you're constantly fixing your tools? It's my hope that these easy to follow instructions will get your Stihl trimmer up and running quickly, so you can get busy relaxing.
If you're working on a Stilh KM 56 RC trimmer, you're in luck because that is the machine I will be working on in this article. One tool you will need, above all others, is a on the other end. This tool should have come with your Stilh KM 56 RC trimmer when you bought it. If you don't have one, buy one. It's worth its weight in gold. You will also need a plug socket tool with a torx bit. I've listed links to both the torx bit and the pull cord below. new pull cord
Tools You Need to Replace a Stihl Trimmer Pull Cord
Here is an outline of the steps you will need to follow in order to replace your pull cord. Pictures and more detailed steps can be found below.
- Remove the end cover.
- Remove the snap ring.
- Disassemble the unit into two pieces.
- Remove the coil from the shaft.
- Hold the spring in place after removing coil.
- Remove the broken piece of rope.
- Clean out debris on the cover.
- Measure out a new piece of rope.
- Thread the new rope into the coil assembly.
- Tie a small knot at the end of the rope and pull it into the coil pocket.
- Wind the pull cord rope around the coil.
- Reinstall the coil into the housing.
- Turn the coil two revolutions clockwise to add tension.
- Thread the rope through the hole in the end cover.
- Install the handle.
- Reinstall the end cover.
1. Remove the end cover. This will house the complete pull cord rope assembly.
2. Remove the snap ring that holds the pull cord rope assembly on the shaft.
3. Notice how the unit splits in two pieces. Also, notice how and where the spring is located.
4. Use a pair of needle-nose pliers to remove the coil unit from the shaft. Pull upwards to easily remove it from the shaft.
5. Once removed, hold the spring in place with your thumb to prevent it from falling out.
6. Remove the broken piece of rope from the coil unit.
7. Clean out debris on the cover.
8. Measure out a new piece of rope using the broken piece, adding a few inches in case of error. Melt the end with a lighter to make threading easier.
9. Thread the new piece of rope into the coil assembly.
10. Tie a small knot at the end of the rope and pull it into the coil pocket.
11. Wind the pull cord rope around the coil, using a piece of scotch tape to hold the rope in the groove.
12. Reinstall the coil into the housing, spinning it slowly until it drops into place. Do not force the coil, or you may damage the spring.
13. Turn the coil two revolutions counterclockwise to add tension to the return spring.
14. Hold the coil in place while you thread the rope through the hole in the end cover. Use a pair of needle-nose pliers.
15. Install the handle while holding onto the rope.
16. Reinstall the cover on the trimmer unit. You are finished!
Put Your Stihl Trimmer Back to Work
Now get to work and trim your heart out! If you have any questions about the installation, let me know by leaving a question or comment in the box below.
Questions & Answers
How do I wind the bottom spring of my trimmer?
See Step 13 from my article. Turn the coil two revolutions counterclockwise to add tension to the return spring.Helpful 3
My string got hot and melted after the second replacement. How long should the string be? Do you know if I should use the 3 or 4mm Stihl string? The 4mm string gets lodged under the housing for the recoil spring.
The string length should be about 2' 6''. I recommend using the 3mm string and do not overfill the spool.Helpful 2