Stihl blowers are popular gardening tools, but they can encounter problems with their fuel lines. Fuel lines can clog, crimp, or crack, which can prevent the engine from starting and running. This is often due to fuel impurities, and the lines should be replaced almost every season. This guide will take you through the steps to change the fuel lines in your Stihl blower, ensuring your engine runs smoothly.
How to change fuel line in Stihl blowers
Characteristics | Values |
---|---|
Tools required | Metal hook (baling wire), approved fuel container, paper towels or shop rags, needle-nose pliers |
Fuel line issues | Clogged, dirty, cracked, pinched, restricted gas flow, rotten, split |
Fuel line replacement | Cut new fuel line at an angle, push into tank through mounting hole, cut square end, install grommet, push small line back into tank, tug until filter rests at bottom |
Additional tips | Lubricate fuel lines with oil to ease threading, ensure carburetor is correctly positioned, coat hoses with Stihl press fluid |
What You'll Learn
Removing the fuel tank
To remove the fuel tank from your Stihl blower, you will first need to drain the fuel from the tank. In a well-ventilated area, remove the fuel cap and empty the fuel from the tank into an approved storage container.
Next, disconnect the spark plug wire to ensure the blower cannot start accidentally. Loosen and remove the thumb screw on the front of the housing, and pull the blower tube off.
Now, you can begin to remove the components that are attached to or cover the fuel tank. Remove the screws from the front of the muffler guard cover and pull the guard cover off the muffler. Remove the blower tube thumb screw from the front of the housing. Then, remove the screws from the right side of the housing and carefully pull the left side of the housing off the blower. The fan cover and handle will come off with the housing.
At this point, you should be able to access and remove the fuel tank from the housing.
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Disconnecting the carburetor
Firstly, ensure you are working in a well-ventilated area. Remove the fuel cap and empty the fuel from the tank into an approved storage container. It is important to do this to avoid any spillage or wastage of fuel.
The next step is to disconnect the spark plug wire. Locate the wire connected to the spark plug and carefully detach it. This step is essential for safety, ensuring the blower cannot accidentally start while you are working on it.
Now, you can proceed to remove the blower tube. Loosen the thumb screw at the front of the housing and gently pull the blower tube off. This will give you better access to the carburetor and other internal components.
The following step is to remove the air filter cover. Unscrew the screws securing the air filter cover and carefully lift it off. This will expose the air filter and other underlying parts.
Now, you need to disconnect the throttle cable. Locate the choke cover plate on top of the carburetor and carefully unhook the throttle cable from it. This will allow you to access and remove the carburetor mounting screws.
Once the throttle cable is disconnected, proceed to remove the carburetor mounting screws. With these screws out of the way, you can gently lift and remove the carburetor from its housing.
At this point, you should be able to see the fuel lines connected to the carburetor. Note the configuration of the small and large fuel lines to ensure you can reconnect them correctly later. Gently pull and remove the fuel lines from the carburetor.
Now that the fuel lines have been disconnected from the carburetor, you can proceed to the next step, which is cleaning or replacing the fuel lines, as per your requirement.
Remember to follow the safety guidelines and wear appropriate protective gear when working with tools and equipment.
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Clearing clogs in the fuel lines
Before you begin clearing clogs in the fuel lines of your Stihl blower, it is important to work in a well-ventilated area. Start by removing the fuel cap and emptying the fuel from the tank into an approved storage container. Disconnect the wire from the spark plug to ensure the blower can't start accidentally.
Now, you can begin to clear the clog. First, check the fuel lines for any signs of damage, such as cracks or leaks. If the fuel lines appear intact, then the clog may be elsewhere. Check the fuel filter screen in the carburetor. Follow the fuel line to the carburetor and locate the fuel inlet tube. There may be a screen here that has become clogged. If so, clean or replace it.
Next, check the fuel filter itself. This is located at the bottom of the fuel tank. Remove it and inspect it for any debris or blockages. If it is clogged, replace it with a new one.
If the fuel filter and fuel lines appear clear, then the clog may be in the carburetor itself. Remove the carburetor and check the fuel inlet tube for any obstructions. Blow out all of the jets and ensure there are no blockages. If necessary, strip it down and clean all the metering ports with carburetor cleaner, paying particular attention to the needle and seat.
Finally, check the breather valve on the top of the gas cap. This can sometimes become stuck, preventing the blower from drawing in air.
Once you have cleared any clogs and replaced any damaged parts, you can reassemble the blower.
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Draining the fuel tank
To drain the fuel tank of your Stihl blower, start by finding a well-ventilated area to work in. You don't want to be inhaling fumes while you work. Next, remove the fuel cap and drain the tank into an approved fuel container. It's important to use a container that is designed for this purpose to reduce the risk of spillage or fumes.
Once you have removed the fuel cap, you will be able to see the fuel filter at the bottom of the tank. Use a metal hook to pull the fuel filter upwards and disconnect it from the end of the suction hose. You can then pull the fuel filter out of the tank. This will allow you to access the fuel lines.
Now that the tank is drained, you can move on to replacing the fuel lines. Cut two 6-inch lengths of fuel tubing and slice a 45-degree taper into one end of each line. This tapered end will help guide the lines through the fuel tank.
With the new fuel lines prepared, you are ready to begin the process of feeding them through the fuel tank and connecting them to the appropriate valves. This can be a tricky process, so take your time and refer to a diagram or video tutorial if needed.
Overall, draining the fuel tank of your Stihl blower is a straightforward process, but it is important to take the necessary safety precautions and follow the steps carefully to avoid any issues.
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Reinstalling the carburetor
Once you have removed the carburetor, noted the configuration of the small and large fuel lines, and cleaned the carburetor, you can begin the reinstallation process.
Firstly, push the fuel lines onto the proper connections on the carburetor. Ensure that the throttle and choke levers are positioned correctly as you insert the carburetor back into the air box. Next, position the carburetor on the side of the engine, and reinstall the mounting screws.
Now, place the air filter cover over the carburetor and secure it with the mounting screws. Finally, push the blower tube back onto the front of the housing and tighten the thumb screw.
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