Regan Brown
If your Stihl chainsaw is acting up, it might be time to change the fuel filter. The fuel filter is located in the gas tank, which is why the tank should be empty before you begin. The best time to replace the fuel filter is just before the saw runs out of fuel. Place the chainsaw on a flat surface, and remove the spark plug boot to prevent accidental start-up. Next, remove the gas cap by lifting the locking lever to the vertical position and twisting it counterclockwise. If there is still gas in the tank, siphon it into a container. Once the tank is empty, you can remove the fuel filter.
How to remove fuel filter on Stihl Chainsaw MS250
| Characteristics | Values |
|---|---|
| Chainsaw placement | On a level/flat surface |
| Spark plug boot | Pull off to prevent accidental start-up |
| Gas cap | Remove by lifting the locking lever to the vertical position and turning the cap counterclockwise |
| Fuel | Siphon into a container with a hand siphon if the tank is not empty |
| Fuel filter | Reach into the gas tank to retrieve it |
| Fuel line | Remove from the fuel tank using a tool |
| Fuel filter replacement | Available at home improvement centers and Stihl authorized dealers |
| Fuel filter and fuel line | Push back into the fuel tank |
| Fuel tank | Fill with gas and twist the cap back on |
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What You'll Learn
Place the chainsaw on a flat surface
To remove the fuel filter on a Stihl chainsaw, you must first place the chainsaw on a flat surface. This is an important step to ensure your safety and the stability of the chainsaw while you work on it.
Choose a work area that is flat and level, such as a workbench or a sturdy table. Make sure the surface is clear of any debris or obstacles that could get in the way or cause instability. If your workbench has a vice, you can use it to secure the chainsaw in place, but this is optional.
Once you've selected a suitable location, carefully lay the chainsaw down on its side. Make sure the chainsaw is turned off and that the chain is not touching any part of your body or clothing. It's important to take precautions to prevent accidental startups. You can do this by removing the spark plug boot before proceeding.
With the chainsaw securely placed on a flat surface, you can now access the fuel tank and begin the process of removing the fuel filter. This step involves removing the gas cap and siphoning any remaining fuel from the tank.
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Remove the spark plug boot
To remove the spark plug boot on a Stihl chainsaw, follow these steps:
Place the chainsaw on a flat, level surface with the bar pointing away from you. This will prevent accidental contact with the ground or your body while you work.
Remove the carburetor box at the back of the saw by twisting the lock counterclockwise. This will give you access to the spark plug and the rubber spark plug boot.
Locate the spark plug and the boot. The boot must be firmly connected to the spark plug to create a spark. If it is loose or damaged, it won't be able to supply the spark plug with the energy needed to throw off a spark.
To remove the spark plug boot, slowly twist it back and forth until it slides off the spark plug wire. You can then install a new spark plug boot by sliding it over the end of the spark plug wire.
If you are repairing a broken spark plug wire, you can do so by pushing the 'springy' part back into the boot, leaving about 1/4" of the 'pokey' part exposed. Then, stick the pokey part into the hole in the plug wire and push the entire assembly back into the boot.
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Take off the gas cap
To take off the gas cap on your Stihl chainsaw, you will need to place the chainsaw on a flat, level surface. This is important to ensure the chainsaw does not move around while you are working on it.
Next, locate the locking lever on the gas cap. This will need to be lifted into a vertical position. Once the lever is in the correct position, you can then turn the gas cap in a counterclockwise direction.
If the gas cap is connected to the chainsaw by a plastic strap, simply let the cap hang freely without completely removing it. If there is no plastic strap, you can set the cap aside.
At this point, you will be able to access the fuel filter, which is located inside the gas tank. If there is still fuel remaining in the tank, it is important to siphon it out before proceeding further.
Some Stihl chainsaws may have a fuel cap with a collapsible ring. If your chainsaw has this feature, ensure that the ring is down and flush with the top of the cap before starting the chainsaw.
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Siphon the fuel
To siphon the fuel from your Stihl chainsaw, you will need to place the chainsaw on a flat surface. Set a gas can next to the fuel tank of the chainsaw. Remove the fuel cap by lifting the locking lever to the vertical position and turning the cap counterclockwise. If the cap is connected to a plastic strap that is anchored to the tank, let the cap hang freely. If there is still gas inside the tank, you will need to siphon it into a container.
To do this, insert a hand siphon into the tank and place the opposite end into the gas can. Siphon the fuel out of the chainsaw and into the gas can. If you do not have a hand siphon, you can use a piece of wire, such as a scrap of 12 or 14 gauge house wiring. Strip the insulation off the wire so that it doesn't react to the fuel. You will need a piece of wire that is about eight inches long. Bend the last inch or two of the wire into a hook shape. Push the wire into the tank and use it to catch the fuel line.
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Use a tool to remove the line from the fuel tank
To remove the fuel filter on a Stihl chainsaw, you will need to access the fuel tank, which contains the fuel line and the fuel filter. It is important to perform this procedure when the fuel tank is empty, so the best time to do it is just before the chainsaw runs out of fuel.
First, set the chainsaw on a level surface to prevent accidental spillage and for ease of operation. Pull off the spark plug boot to prevent accidental start-up. Then, remove the gas cap by lifting the locking lever to the vertical position and turning the cap counterclockwise. If the cap is connected to a plastic strap that is anchored to the tank, let the cap hang freely. If there is still gas inside the tank, siphon it into a container with a hand siphon. Place a gas can next to the fuel tank of the chainsaw and insert the hand siphon into the tank, with the opposite end in the gas can.
Now, to remove the line from the fuel tank, you will need a tool. You can use a piece of wire, such as a scrap of 12 or 14-gauge house wiring. Strip the insulation off the wire to prevent any reaction with the fuel. You will need about an eight-inch piece of wire. Bend the last inch or two into a hook shape. Insert this hook into the tank and use it to catch and remove the fuel line.
Once the fuel line is removed, you can access and replace the fuel filter.
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Frequently asked questions
The fuel filter on your Stihl chainsaw MS250 needs to be changed periodically as it can get clogged with sediment and impurities, causing the chainsaw to stumble, shut off, or stall while operating.
It is recommended to inspect and change the fuel filter on your Stihl chainsaw MS250 as part of regular maintenance. The best time to perform the procedure is just before the saw runs out of fuel.
You will need a tool to remove the fuel line from the fuel tank. Additionally, you may need a hand siphon to remove any remaining fuel from the tank, and a piece of wire (such as a metal clothes hanger) to retrieve the fuel filter.
Here are the general steps:
- Place the chainsaw on a flat, level surface.
- Remove the spark plug boot to prevent accidental startup.
- Take off the fuel cap by lifting the locking lever vertically and turning it counterclockwise.
- Siphon any remaining fuel into a container if the tank is not empty.
- Use a tool to detach the fuel line from the fuel tank.
- Retrieve the fuel filter using a piece of wire.
Replacement fuel filters for your Stihl chainsaw MS250 are available at home improvement centers and authorized Stihl dealers.
