How to Replace Fuel Filter STIHL BG 55: Your Step-by-Step DIY Guide

Are you experiencing trouble with your Stihl BG 55 blower? Does it sputter, cough, or refuse to start? A clogged fuel filter could be the culprit! Replacing the fuel filter is a simple maintenance task that can significantly improve your blower’s performance and longevity. This guide will walk you through the process of replacing the fuel filter on your Stihl BG 55, step by step.

Why Replace the Fuel Filter?

Fuel filters are essential components in any gasoline-powered engine. They act as a barrier, preventing dirt, debris, and other contaminants from entering the carburetor and damaging the engine’s delicate internal parts. Over time, the filter can become clogged with sediment, restricting fuel flow and causing problems like:

• Difficulty starting: A clogged filter can prevent fuel from reaching the carburetor, making it challenging to start the engine.
• Stuttering and sputtering: An insufficient fuel supply due to a clogged filter can lead to uneven engine operation, causing sputtering and hesitation.
• Reduced power: A clogged filter can restrict fuel flow, resulting in a decrease in engine power and performance.
• Engine damage: If left unchecked, a severely clogged filter can lead to fuel starvation and engine damage.

Tools and Materials You’ll Need

Before you begin, gather the following tools and materials:

• New fuel filter: Ensure you purchase the correct fuel filter specifically designed for your Stihl BG 55 blower.
• Phillips screwdriver: This is needed to remove the fuel filter cover.
• Flathead screwdriver: You might need this to pry off the fuel line clamps.
• Clean cloth or paper towels: Keep your work area clean and prevent dirt from entering the fuel system.
• Safety glasses: Protect your eyes from potential debris or fuel spills.
• Gloves: Protect your hands from fuel and dirt.

Step-by-Step Guide to Replacing the Fuel Filter

Now, let’s get started with replacing the fuel filter:

1. Safety First: Always start by turning off the engine and disconnecting the spark plug wire to prevent accidental starting. This will ensure a safe working environment.

2. Locate the Fuel Filter: On the Stihl BG 55 blower, the fuel filter is typically located near the fuel tank, often on a fuel line running from the tank to the carburetor. It’s usually a small, cylindrical filter with a transparent or opaque housing.

3. Remove the Fuel Filter Cover: Use the Phillips screwdriver to loosen and remove the screws holding the fuel filter cover in place.

4. Disconnect the Fuel Lines: Gently pry off the fuel line clamps using the flathead screwdriver. Be careful not to damage the fuel lines.

5. Remove the Old Fuel Filter: Once the fuel lines are disconnected, carefully pull the old fuel filter out of its housing.

6. Inspect the Old Filter: Take a moment to inspect the old filter. If it’s heavily clogged or discolored, it’s a clear indication that it needs replacement.

7. Install the New Fuel Filter: Insert the new fuel filter into the housing. Make sure it’s seated properly.

8. Reconnect the Fuel Lines: Reattach the fuel lines to the new filter, ensuring the clamps are securely fastened.

9. Replace the Fuel Filter Cover: Screw the fuel filter cover back in place, tightening the screws securely.

10. Reconnect the Spark Plug Wire: After completing the filter replacement, reconnect the spark plug wire.

11. Start the Engine: With the filter replaced and the spark plug wire connected, try starting the engine. It should run smoothly with improved performance.

Maintaining a Clean Fuel System

Regularly replacing the fuel filter is crucial for maintaining optimal engine performance. Here are some additional tips to keep your fuel system clean:

• Use Clean Fuel: Always use fresh, high-quality gasoline. Avoid using fuel that has been sitting for extended periods.
• Store Properly: When not in use, store your Stihl BG 55 blower in a dry, well-ventilated area.
• Regularly Check the Fuel Lines: Periodically inspect the fuel lines for cracks or leaks.
• Clean the Fuel Tank: If you notice sediment in the fuel tank, it’s a good idea to clean it out.

Final Thoughts: Keeping Your Stihl BG 55 Running Smoothly

By following these steps, you can confidently replace the fuel filter on your Stihl BG 55 blower and ensure its smooth operation. Remember, a clean fuel filter is essential for maintaining optimal performance and extending the life of your blower.

Information You Need to Know

Q1: How often should I replace the fuel filter on my Stihl BG 55?

A: It’s generally recommended to replace the fuel filter every 12 months or 50 hours of operation, whichever comes first. However, if you notice any signs of a clogged filter, such as difficulty starting or reduced power, replace it sooner.

Q2: Can I clean the old fuel filter instead of replacing it?

A: While you can try cleaning the old filter, it’s not recommended. Fuel filters are designed to be disposable, and cleaning them often doesn’t remove all the contaminants. It’s best to use a new filter for optimal performance.

Q3: What type of fuel should I use in my Stihl BG 55?

A: Refer to your Stihl BG 55 owner’s manual for specific fuel recommendations. Typically, it’s recommended to use unleaded gasoline with an octane rating of 87 or higher, mixed with a 2-cycle engine oil at the manufacturer’s recommended ratio.

Q4: What should I do if I encounter difficulty starting the engine after replacing the fuel filter?

A: If you have trouble starting the engine after replacing the fuel filter, double-check the following:

• Fuel lines: Ensure the fuel lines are properly connected and secured.
• Fuel filter: Make sure the new filter is properly seated in the housing.
• Spark plug: Inspect the spark plug for wear or damage.
• Fuel tank: Make sure the fuel tank is filled with fresh, clean fuel.

Q5: Where can I find replacement fuel filters for my Stihl BG 55?

A: You can find replacement fuel filters for your Stihl BG 55 at authorized Stihl dealers, online retailers, or through Stihl’s website. Always ensure you purchase the correct filter specifically designed for your model.