Ameer Randolph
The Stihl FS44 is a string trimmer that may require some maintenance and repair, especially if it was purchased second-hand. One such issue that may need addressing is the installation of new fuel lines. This is often done in conjunction with a carburetor clean and rebuild. There are several repair kits available for the Stihl FS44, and many resources to help guide you through the process of installing new fuel lines.
| Characteristics | Values |
|---|---|
| Fuel line routing | The bigger hose of the two is the supply to the carburettor, and the smaller hose is the fuel return from the carburettor to the tank |
| Fuel line replacement | Take the trimmer apart and replace the fuel lines |
| Carburettor | May need to be cleaned and rebuilt |
| Fuel filter | May need to be replaced |
| Air filter | May need to be replaced |
| Seals | Check if they are working correctly |
| Spark arrestor screen | May need to be removed if caked-up |
| Carburettor settings | May need to be adjusted |
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What You'll Learn
Carburettor cleaning and rebuilding
Carburettor issues are common in the Stihl FS44 trimmer. Users have reported problems with tuning the carburettor, which may be caused by carbon buildup, or faulty valves and gaskets.
To clean and rebuild your carburettor, you can purchase a carburettor rebuild kit, which is available on Amazon. These kits include a primer bulb, fuel line, and filter.
Before purchasing a rebuild kit, you can try cleaning the carburettor. Take apart the carburettor and clean any carbon buildup with a suitable cleaning agent. Check the gaskets and valves, and replace them if necessary. You can also try adjusting the carburettor's hi-lo-idle settings.
If you decide to purchase a rebuild kit, make sure you have the right tools and skills to replace the check valves, as they are not easy to replace. The kit may also include extra parts that you don't need, but it's better to have more than you need than not enough.
Once you have cleaned or rebuilt your carburettor, make sure to test it out and adjust the settings as needed to ensure it is working properly.
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Identifying the correct fuel line
The fuel line diagram will show the connections between the fuel tank, carburetor, and purge bulb, as well as the location of any fuel filters or fittings. The fuel tank is where the fuel is stored, and the fuel filter prevents debris from entering the carburetor. The fuel hose, or fuel line, connects the fuel tank to the carburetor, enabling fuel to flow into the engine. The purge bulb, or primer bulb, is used to manually prime the carburetor with fuel, making the trimmer easier to start.
By understanding the fuel line diagram, you can identify and troubleshoot any issues with your Stihl FS44 trimmer. For example, if your trimmer is not starting or running properly, you can refer to the diagram to check for clogs or leaks in the fuel line. You can also ensure that the fuel hose is correctly connected and that the fuel filter is clean and functioning as it should.
Additionally, the fuel line diagram is essential when performing maintenance tasks. It provides guidance for the proper assembly and disassembly of the fuel system components, helping you to accurately perform tasks such as replacing or repairing the fuel lines or any other related parts.
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Replacing the fuel filter
To replace the fuel filter on your Stihl FS44, you will need to purchase a carburetor rebuild kit. These kits are available from Amazon and eBay, and they include a fuel line and filter.
Once you have purchased the kit, follow these steps to replace the fuel filter:
- Remove the old fuel filter: Start by locating the fuel filter on your Stihl FS44. It is usually found near the carburetor. Once you have located it, use a pair of pliers or a filter wrench to carefully remove it. Be sure to catch any fuel that may leak out with a rag or drip pan.
- Clean the area: Before installing the new fuel filter, use a clean rag to wipe down the area. This will help to ensure that no dirt or debris gets into the fuel system.
- Prepare the new fuel filter: Remove the new fuel filter from the packaging and check that it is the correct size and type for your Stihl FS44. If necessary, cut the fuel line to the correct length, following the instructions in your Stihl FS44 manual.
- Install the new fuel filter: Insert the new fuel filter into the fuel line, ensuring that it is securely connected and seated properly. Hand-tighten any connections, using pliers or a filter wrench if necessary. Be careful not to overtighten the connections, as this can damage the fuel line or fuel filter.
- Refill and test: Refill the fuel tank and check for any leaks around the new fuel filter. Start the engine and let it run for a few minutes to ensure that the new fuel filter is working properly.
By following these steps, you can replace the fuel filter on your Stihl FS44, ensuring that your equipment continues to run smoothly and efficiently.
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$32.22
Checking seals are working
I could not find specific instructions for checking if the seals are working on a Stihl FS44. However, I did find some general information about checking seals on a Stihl 044.
One user on an arborist forum reported that they had replaced the starboard crank seal on their Stihl 044 four times, and it still would not hold pressure. They tried installing the seal high and pushing it in deeper, but it still leaked. They also tried using another collar from another 044, but that did not work either.
Another user on the same forum suggested filling the backside of the seal with grease to hold the spring in place and lubing the seal well on the lip. They also suggested putting grease on the inside of the sleeve and then sliding it into place before putting the clutch on.
In addition, one user on the same forum reported that they had a used motor on the way from eBay and were considering swapping the jug and piston to avoid taking the whole thing apart. They mentioned that they would need to be careful with the crank seals, as they could start leaking.
There are also some general tips for troubleshooting and maintaining seals. For example, it is recommended to clean the area around the seal before installing it and to check for any wear or damage. It is also important to make sure that the seal is installed correctly and that there are no gaps or spaces that could cause leaks.
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Adjusting the carb's hi-lo-idle settings
Adjusting the carburettor on a Stihl FS44 can be a tricky process, and it's recommended that normal homeowners do not adjust the carb settings. However, if you have the right tools and safety precautions in place, you can attempt to adjust the carburettor yourself.
Firstly, locate the screws for fuel adjustment. There will be two of these screws, with one marked "Hi" and the other marked "Lo". The "Hi" screw regulates the engine when it is performing at full throttle, while the "Lo" screw regulates fuel use when the engine is idling.
Using a small Phillips screwdriver, tighten these screws to place the needle ends into the carburettor's jets. Turn the "Hi" screw counterclockwise by one and a half turns and the "Lo" screw by one complete turn in the same direction.
Now, push the throttle open fully and check the engine's performance. If the engine sputters, you will need to smooth it out by turning the "Hi" screw a bit less than a quarter turn in a clockwise direction. Keep adjusting until the engine runs smoothly.
Finally, you can operate the machine, but keep the screwdriver with you in case you need to make any further adjustments.
It is important to note that the factory settings on a Stihl FS44 are generally well-calibrated for most environments, and adjusting the carburettor may not always resolve problems with engine acceleration. Always refer to the owner's instruction manual for the correct settings and safety precautions.
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