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Frequently Asked Questions

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Servicing the Fuel Filter

Where is the fuel filter and how is it serviced?

Servicing the Fuel Filter

A clean fuel filter strains the fuel before it reaches the carburetor and prevents foreign particles from clogging your engine. A dirty fuel filter can make the engine run too lean, with diminished performance and uneven operation. Other factors can cause these problems, but the fuel supply is one of the easiest to check.

Some filters are located inside the tank, others are fitted into the fuel line between the tank and the fuel pump. Most use either a mesh screen or pleated paper. The size of the holes in the filter will determine the largest particles that can get through the filter, and the number of holes will affect the amount of fuel that can flow through the filter.

Filters contain either a mesh screen or a pleated-paper element, and are rated by the size of the holes in the filtering material, expressed in microns. Briggs & Stratton mesh screen filters are color-coded red for 150 microns, and white for 75 microns. Pleated-paper filters, designed for use in the fuel tank, are typically contained in a clear plastic casing and rated 40 microns. They consist of multiple folds that strain out particles suspended in the fuel.

Installation of an inline fuel filter is based on an arrow, which should point towards the carburetor. If no arrow is present, the direction really does not matter. However, if you would like to copy our production line, then place the larger end of the filter towards the fuel tank.

Also, when installing an in line fuel filter to an engine for the first time (engine never had a fuel filter to begin with) its always best to install the filter as close to the carburetor fuel inlet as possible, to an area that is not obstructed in any way and is away from any potential source of heat.

The proper filter for your engine depends on the engine's design. Consult your local Authorized Dealer for the correct replacement filter or check your engine Illustrated Parts List.

For your convenience, we offer three easy ways to locate your nearest Briggs & Stratton Authorized Dealers:

  • Use our website's Service Center Locator.

  • Visit www.yellowpages.com and enter "Lawn Mowers" or "Engines-Gasoline" in the Category search field and your Postal Code in the Location search field.

  • Call the Briggs & Stratton Automated Hotline at (800) 444-7774. This hotline is available 24 hours a day / 7 days a week and features voice recognition technology to assist you in finding the Briggs & Stratton Authorized Dealers in your area. Automated maintenance tips, product information, and FAQs are also offered through voice activated menus.

Inspecting A Fuel Filter

Wear safety eyewear whenever removing or inspecting a filter to protect our eyes from liquid fuel or fuel vapors. Have a dry cloth handy to hold the filter and catch and dripping fuel. If the filter is installed inside the tank, you will need to drain the tank before you can remove the filter for inspection or replacement.

  1. Shut the fuel valve, if equipped. It's located at the base of the fuel tank, where the fuel line is attached. If your tank is not equipped with a fuel valve, clamp the fuel line, using a fuel line clamp.

  2. If your filter is installed in the fuel line, remove the metal clips on each side of the filter, using needle nose pliers, and slide the filter out of the fuel line (image A)
    Image A
    .

  3. Shake the filter over a clean cloth to displace any remaining fuel, then use the cloth to wipe away any residue from the outside of the filter.

  4. Keep the filter a safe distance from your face and look through one end (image B)
    Image B
    . You should be able to see light shining through clearly from the other side. If debris is clogging the mesh screen or pleated paper or the inside of the casing, replace the filter.


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