Sylvie Willis
Changing the fuel filter on your push mower is an important part of annual maintenance. It will prevent costly repairs and extend the life of your engine. The process is simple, but it's important to take safety precautions, such as wearing safety eyewear and ensuring there is no fuel in the tank before you begin. You will also need a few tools, such as a Phillips-head screwdriver, a 5/16 inch socket or nut driver, and pliers. Once you have the right tools and safety gear, you can locate the fuel filter and replace it with a new one, taking care to reconnect the metal clips on both sides and check for leaks before starting the engine.
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What You'll Learn
Prepare your work area and safety equipment
It is important to prepare your work area and safety equipment before attempting to replace the fuel filter on your push mower. Fuel and its vapors are extremely flammable and explosive, so always handle fuel with extreme care. Make sure you are in a safe area with no open flames or fire sources. Wear safety goggles to protect your eyes from any fuel residue or debris. You should also wear gloves to protect your hands.
Ensure that the engine is cool before you begin any work. Remove the wire and boot from the spark plug to prevent the engine from accidentally starting. If your tank is equipped with a fuel valve, shut it off. If not, clamp the gas line using a fuel line clamp. Do not pinch the fuel line, as this could cause damage.
Place a bucket or fuel can underneath the fuel line to catch any remaining fuel. Use a fuel line clamp or another smooth-faced clamp to seal the fuel line where it attaches to the carburetor. Then, disconnect the line from the carburetor and the vent line, if equipped. Dispose of all fuel in a safe manner.
Before beginning any work on your push mower, always read the engine and equipment manual to avoid personal injury or property damage. If you are unsure of any procedure or have additional questions, consult an authorized dealer or a local Briggs and Stratton dealer.
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Locate the fuel filter
To locate the fuel filter on your Briggs & Stratton engine, you should first consult the engine's Illustrated Parts List, which will show you where the fuel filter is located. If you cannot find this information, you can consult your local Briggs & Stratton dealer.
In some Briggs & Stratton engines, the fuel filter may be built into the fuel tank and may not be serviceable. If your fuel filter is installed inside the tank, you will need to drain the tank before removing the filter for inspection or replacement. Shut the fuel valve, if your tank is equipped with one—it may be located at the base of the fuel tank, where the gas line is attached. If your tank does not have a valve, you will need to clamp the gas line using a fuel line clamp.
If your fuel filter is not an in-tank design, it should be located along the fuel line. Before performing any maintenance on your engine, make sure it has cooled down. Then, remove the wire and boot from the spark plug to prevent the engine from accidentally starting. You should also perform this procedure with no fuel in the tank.
Once you have located the fuel filter, you can begin the process of replacing it.
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Remove the old fuel filter
To remove the old fuel filter from your push mower, you must first locate the fuel filter. If you cannot easily locate it, it may be an in-tank design. If the filter is installed inside the tank, you will need to drain the tank before removing the filter. Shut the fuel valve, if your mower is equipped with one—it may be located at the base of the fuel tank, where the gas line is attached. If your tank is not equipped with a valve, clamp the gas line using a fuel line clamp.
Before you begin, ensure you are in a safe area with no open flames or fire sources. Wear safety eyewear to protect your eyes from liquid fuel or fuel vapors. Have a dry cloth handy to hold the filter and catch any dripping fuel.
Next, remove the wire and boot from the spark plug to prevent the engine from accidentally starting. Ensure the engine has cooled before you begin.
Now, use a 5/16th inch socket or nut driver to unthread the screw securing the air filter cover. Remove the cover and the filter, then use a Phillips-head screwdriver to remove the screw securing the carburetor cover.
Finally, remove the old fuel filter. When replacing the fuel filter, be sure to reconnect the metal clips on both sides of the filter. Some filters have a direction of flow arrow on them, so ensure the new filter is installed correctly.
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Prepare the new fuel filter
To prepare the new fuel filter, you must first ensure that the engine has cooled down. Next, remove the wire and boot from the spark plug to prevent accidental ignition. It is important to perform this procedure with no fuel in the tank.
Before installing the new fuel filter, check that it is the correct replacement filter for your engine. The proper fuel filter depends on the engine's design, so refer to your engine's Illustrated Parts List or consult a Briggs & Stratton dealer. When purchasing a fuel filter, consider the micron rating, which indicates the filter's ability to screen out particulates. A smaller micron number corresponds to a better filtration capability.
Once you have confirmed that you have the correct fuel filter, trim the new fuel line to match the length of the old one. Attach the shorter end of the fuel line to the port on the tank, and the longer end to the carburetor port. Secure the line with retaining clamps.
Finally, check that the gasket is in place on the air filter housing. Attach the breather tube to the breather post and realign the housing.
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Reattach the spark plug wire and boot
To reattach the spark plug wire and boot, follow these steps:
- Ensure that the engine has cooled down before beginning any work on reattaching the spark plug wire and boot.
- Reattach the wire and boot to the spark plug. This step is crucial to prevent the engine from accidentally starting during the remaining procedure.
- Refill the fuel tank. Be cautious and avoid overfilling.
- Check that the gasket is in place on the air filter housing.
- Reattach the breather tube to the breather post and realign the housing.
- Realign the carburetor cover and ensure that all screws are properly tightened and secured.
By following these steps, you can safely and effectively reattach the spark plug wire and boot after replacing the fuel filter on your Briggs and Stratton engine.
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Frequently asked questions
The most common reasons for replacing the fuel filter are when the engine stops after a few seconds or runs poorly. You can also check if there is debris clogging the mesh screen, pleated paper, or the inside of the casing. If so, you should replace the old filter with a new one. It is recommended that you change the fuel filter annually as part of your mower's maintenance.
The fuel filter may be located inside the fuel tank and may not be serviceable. If you cannot easily locate it, it may be an in-tank design. Check your engine Illustrated Parts List or consult your local Briggs & Stratton dealer for help locating the correct replacement filter.
You will need a Phillips-head screwdriver, a 5/16 inch socket or nut driver, and pliers. You should also have a dry cloth handy to catch any dripping fuel.
