Replacing Jonsereds Fuel Filter: Step-By-Step Guide

The Jonsered fuel filter is located inside the fuel tank and is designed to filter out dirt, debris, and other contaminants from the carburetor. Over time, the fuel filter can become clogged, leading to a decrease in performance. Replacing the fuel filter involves removing the old filter from the tank unit and installing a new one, ensuring proper filtering and flow. It is important to follow the manufacturer's instructions and take the necessary precautions to avoid leakage or damage. The fuel hose, which supplies fuel from the tank to the carburetor, may also need replacement due to deterioration or cracking.

Removing the old fuel filter

To remove the old fuel filter from your Jonsered chainsaw, you will need to first locate the fuel tank. The fuel filter is inside the fuel tank, and its purpose is to filter out dirt, debris, and other contaminants from the carburetor.

Before beginning, ensure you have the correct tools for the job. For the Jonsered CS 2240 model, the manufacturer recommends using a special tool with the part number 502 50 83-01 to remove the old fuel filter. Do not use knurled pliers as this could damage the hose and lead to leaks.

Now, carefully remove the old fuel filter from the tank unit. The fuel filter is connected to the fuel line, so you will need to pull the fuel hose out of the tank unit as well. Be gentle as the fuel hose can be brittle and may crack or break. Once you have removed the old fuel filter and hose, dispose of them appropriately.

If you are unsure about the process, it is recommended to refer to the manufacturer's instructions or seek advice from a qualified technician.

Using the correct tools

To replace the fuel filter in your Jonsered chainsaw, you will need to use the correct tools to ensure a safe and effective replacement. Here is a detailed guide on the tools you will need and how to use them:

First, you will need to purchase a suitable replacement fuel filter for your specific Jonsered model. Make sure to buy a high-quality replacement part that meets or exceeds the original equipment manufacturer (OEM) specifications. You can find compatible replacement fuel filters online or at specialised stores.

Once you have the new fuel filter, gather the necessary tools. For this task, you will need:

• Special tool 502 50 83-01: This is a specific tool mentioned in the Jonsered CS 2240 workshop manual for removing the old fuel filter.
• Suitable pliers with a plain cutting face: These pliers will be used for loosening and reconnecting the fuel hose without damaging it.
• Wrench: A wrench may be needed for certain steps, such as when working with specific parts like the snow blower auger.

Now, let's get into the process:

• Using the special tool 502 50 83-01, carefully remove the old fuel filter from the tank unit. It is important to use this specific tool to avoid damaging the fuel hose and causing leaks.
• Pull the fuel hose out of the tank unit.
• Fit the new fuel filter into the fuel hose. Ensure that the connection is secure and tight.
• Feed the fuel hose back into the tank unit.
• Use the suitable pliers with a plain cutting face to loosen or reconnect the fuel hose as needed. Ensure that you do not use knurled pliers as these can damage the hose.
• If you need to work with any other parts, such as the snow blower auger, make sure to have a wrench on hand for those specific tasks.

By using the correct tools and following the steps outlined above, you can effectively replace the fuel filter in your Jonsered chainsaw, ensuring optimal performance and avoiding any damage to the fuel system.

Replacing the fuel hose

To replace the fuel hose on a Jonsered chainsaw, you will need to first identify the type of fuel hose your model uses. The fuel hose is responsible for supplying fuel from the tank to the carburettor, and over time it can become clogged or cracked, leading to poor performance or engine failure.

The fuel hose on a Jonsered chainsaw can be made of rubber, PVC-formulated compounds, or viton material. It is important to use the correct type of fuel hose for your specific model to ensure proper fit and function. You can refer to your owner's manual or consult a Jonsered dealer to determine the correct type of fuel hose for your chainsaw.

Once you have the correct fuel hose, follow these steps to replace it:

• Disconnect the fuel hose from the carburettor: Before beginning any work on your chainsaw, ensure the engine is cool and the spark plug is disconnected to prevent accidental starting. Locate the fuel hose connected to the carburettor and carefully disconnect it using suitable pliers. Be gentle to avoid damaging the hose or the carburettor.
• Remove the old fuel hose: The fuel hose on a Jonsered chainsaw is typically routed through the fuel tank and other components, so it is important to work carefully to avoid damaging any other parts. Working from the outside, carefully remove the old fuel hose by loosening it from the fuel tank using suitable pliers with a plain cutting face. Be sure to align the cut-out against the plastic pin when assembling.
• Install the new fuel hose: With the old fuel hose removed, you can now install the new one. Feed the new fuel hose through the same path as the old one, ensuring it is securely connected to the fuel tank and carburettor. Make sure the hose is not twisted or kinked, as this can restrict fuel flow.
• Secure the fuel hose: Use suitable clamps or connectors to secure the new fuel hose in place, following the routing used by the previous hose. Ensure all connections are tight and secure to prevent fuel leaks.
• Refill the fuel tank: With the new fuel hose installed, you can now refill the fuel tank with fresh fuel. Check for any signs of leakage around the connections and ensure that the hose is securely attached.

By following these steps, you can replace the fuel hose on your Jonsered chainsaw, ensuring proper fuel delivery and maintaining the performance and longevity of your equipment.

Replacing the air-purge

To replace the air-purge on your Jonsered CS 2240 chainsaw, follow these steps:

Firstly, dismantle the cylinder cover and the air filter. This will give you access to the air-purge components. Next, loosen the suction hose and the return hose from the fuel pump. You may need to refer to Figure 31 in your Jonsered CS 2240 Workshop Manual for the location of these hoses. Once the hoses are loose, you can unsnap the fuel pump from the filter holder. Now you can begin the process of reassembly. Fit the return hose back onto the fuel pump, ensuring it is secure. Then, snap the purge into the filter holder. Refer to Figure 45 in your manual if you need clarification on this step. Finally, reassemble the air filter and cylinder cover.

These steps should guide you through the process of replacing the air-purge on your Jonsered CS 2240 chainsaw. It is important to follow any safety guidelines and instructions provided by the manufacturer when performing any maintenance or repairs on your chainsaw.

If you encounter any issues or need further clarification on any steps, refer to your Jonsered CS 2240 Workshop Manual for more detailed instructions and diagrams.

Maintaining performance

The Jonsered fuel filter needs to be replaced regularly to ensure top performance when cutting. Over time, the fuel filter will become clogged with dirt, sawdust, stale varnished fuel, filter particles from deterioration, and water. This will restrict the fuel getting to the carburetor and significantly cut down on the performance of the saw.

The Jonsered fuel line will also deteriorate over time from ethanol, dry rot, and exposure to gasoline. When the fuel line is cracked, broken, or develops pinholes, it will also need to be replaced. A fuel line that lets air in can cause poor saw performance or result in a lean fuel mixture, which could cause internal engine failure.

To maintain the performance of your Jonsered, it is important to replace the fuel filter and fuel line as needed and to follow the manufacturer's specifications for fuel filter replacement. Failing to do so can lead to decreased performance and even engine failure.

Additionally, when replacing the fuel filter, it is important to use the correct tools and techniques. Do not use knurled pliers to disconnect or reconnect the fuel hose as this could damage the hose and lead to leakage or fracturing. Instead, use suitable pliers with a plain cutting face to loosen the hose.

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