Regan Brown
If your Stihl trimmer is stalling or won't start, a dirty fuel filter could be the culprit. The fuel filter is located inside the fuel tank, at the end of the incoming fuel line. To replace it, first, remove the spark plug wire boot to prevent the engine from starting accidentally. Then, remove the fuel cap and siphon the fuel into a container. You can then use a wire with a hook or needle-nose pliers to pull out the fuel line and filter. Install the new filter by pushing it into place on the fuel line and securing it with the retaining ring. Reinsert the fuel line and filter into the tank, and finish by reattaching the spark plug wire boot.
| Characteristics | Values |
|---|---|
| Tools required | Needle-nose pliers, wire with a hook, a screwdriver, a coat hanger, hemastats |
| Step 1 | Remove the wire and boot from the spark plug |
| Step 2 | Remove the gas cap and pull the retainer out of the tank |
| Step 3 | Use a wire with a hook to pull out the fuel line and filter |
| Step 4 | Slide off the retaining ring and pull off the old filter from the line |
| Step 5 | Install the new fuel filter by pushing it into place on the fuel line |
| Step 6 | Secure the filter with the retaining ring and gently reinsert the fuel line and filter back into the tank |
| Step 7 | Insert the gas cap retainer into the tank then thread the cap on and tighten |
| Step 8 | Reattach the wire and boot to the spark plug |
What You'll Learn
Locating the fuel filter
Firstly, you need to identify the location of the sparkplug and plug wire on your Stihl trimmer. The sparkplug is typically found near the top rear of the trimmer's engine housing. Once you've located it, remove the sparkplug wire boot from the sparkplug by grasping it with your fingers and pulling it off gently. Set it aside by bending the wire away from the sparkplug to prevent accidental contact.
The next step is to remove the fuel cap by twisting it counterclockwise and lifting it off the fuel tank. At this point, you may need to siphon the fuel from the tank into an appropriate container for disposal. Be sure to follow proper fuel disposal guidelines.
Now, let's locate the fuel filter. Look inside the fuel tank, and you'll find the fuel line laying at the bottom. The fuel filter, also known as the pickup, is attached to the end of this fuel line. To access it, you may need to use needle-nose pliers to pull the fuel line and the attached fuel filter out of the tank. Tilting the trimmer slightly can help move the fuel line closer to the tank opening, making it easier to grab with the pliers.
Once you have a good grip on the fuel line with the pliers, use your free hand to grasp the end of the line and carefully pull the fuel filter off. The fuel filter is now ready for replacement.
When installing the new fuel filter, hold the fuel line in one hand and push the stem of the new filter firmly into the end of the line with your other hand. Ensure that the fuel line is securely attached and flush with the top of the new fuel filter.
Finally, push the new fuel filter back into the fuel tank and gently shake the trimmer until the fuel line and filter settle at the bottom of the tank. Reattach the sparkplug wire boot securely to the sparkplug, and your Stihl trimmer should be ready for use.
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Removing the spark plug wire
To remove the spark plug wire from your Stihl trimmer, start by removing the wire and boot from the spark plug to prevent the engine from accidentally starting.
Next, take a look at the spark plug wire. You'll notice that there's a hole in the wire, and the spring clip inside the boot that connects to the spark plug. The spring clip may have broken off, so you'll need to remove it from the boot and reattach it to the hole in the wire. You can use a pair of needle-nose pliers to help with this step.
Once the spring clip is secured in the hole, it's time to put the boot back on. This part can be tricky, so it's recommended to use some lubrication, such as WD-40 or dish detergent, to make it easier. Hold the spring in place on the ignition wire and gently slide the boot over the assembly until the spring is fully seated inside.
If you're having trouble getting the boot back on, there are a few additional tips you can try. One suggestion is to remove the spring from the boot, apply a small amount of lubricant to the coil end, and then use a Q-tip to clean the coiled portion before placing it back into the boot. You can also try letting the boot soak in gasoline for a little while to expand it, making it easier to slide onto the clip.
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Removing the fuel cap
To remove the fuel cap from your Stihl trimmer, first locate the sparkplug and plug wire on the trimmer. The sparkplug is found near the top rear of the trimmer engine housing. Disconnect the sparkplug wire boot from the sparkplug by pulling it off with your fingers. Bend the wire to the side, ensuring that the boot does not touch the sparkplug.
Now you can twist the fuel cap counterclockwise and remove it from the fuel tank. If you intend to replace the fuel filter, it is important to siphon the fuel from the tank into a container and dispose of it properly.
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Removing the fuel filter
To remove the fuel filter from your Stihl trimmer, first locate the sparkplug and plug wire. The sparkplug is near the top rear of the trimmer engine housing, and the sparkplug wire boot is the part of the wire that connects to the top of the plug. Grasp the sparkplug wire boot and pull it off the sparkplug. Bend the wire to the side so that the boot does not touch the sparkplug.
Next, remove the fuel cap by twisting it counterclockwise. Siphon the fuel from the tank into a container and dispose of it properly.
Now, look inside the fuel tank for the fuel line. The fuel filter is on the end of the fuel line. You may need to tilt the trimmer to move the fuel line closer to the tank opening. Use needle-nose pliers to pull the end of the fuel line and the fuel filter out of the tank.
Finally, grasp the end of the fuel line with your fingers and pull the fuel filter off with your other hand.
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Installing the new fuel filter
To install the new fuel filter, firstly, hold the fuel line in one hand and push the stem of the replacement filter into the end of the line with your other hand. Push the filter until the end of the fuel line is flush with the top of the gas filter. Then, push the new gas filter into the fuel tank and shake the trimmer back and forth until the fuel line and gas filter are resting at the bottom of the tank. Next, fill the tank with your fuel/oil mixture. Finally, push the spark plug wire boot over the top of the plug until it locks.
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Frequently asked questions
The fuel filter is inside the fuel tank, at the end of the incoming fuel line.
If your Stihl trimmer is difficult to start or stalls often, even with a full tank of fuel, the fuel filter may be dirty and need replacing.
You will need a long pair of needle-nose pliers, a wire with a hook, and a replacement fuel filter.
First, remove the spark plug wire and boot to prevent the engine from starting accidentally. Then, remove the fuel from the tank. Next, use the pliers or a wire with a hook to remove the fuel line and filter from the tank. Remove the old filter from the line, push the new filter into the line, and then push the line and new filter back into the tank. Refill the tank with fuel, and reattach the spark plug wire and boot.
It depends on how often you use your trimmer and the conditions in which you use and store it. If you notice that your trimmer is becoming difficult to start or is stalling often, this may be a sign that the fuel filter needs to be replaced.
