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How to clean and maintain your Briggs and Stratton 675 Series Carburetor

What you need

  1. How to clean and maintain your Briggs and Stratton 675 Series Carburetor, How to clean and maintain your Briggs and Stratton 675 Series Carburetor: step 1, image 1 of 1
    • Make sure the the engine is off and the spark plug wire is removed and away from the spark plug before beginning.

    • Use a Flathead #4 screw driver to remove the 40mm screw that holds the air filter case in place.

  2. How to clean and maintain your Briggs and Stratton 675 Series Carburetor: step 2, image 1 of 1
    • Use your hands to pull the air filter case out of the hinge at the bottom.

  3. How to clean and maintain your Briggs and Stratton 675 Series Carburetor: step 3, image 1 of 2 How to clean and maintain your Briggs and Stratton 675 Series Carburetor: step 3, image 2 of 2
    • Use a socket wrench with a 5/16" hex bit to remove three 20mm bolts behind the air filter.

    • Use your hand to remove the plastic backing to the air filter, exposing the carburetor.

  4. How to clean and maintain your Briggs and Stratton 675 Series Carburetor: step 4, image 1 of 1
    • Note: There is a plastic washer that may come off when you take off the plastic backing. This is normal; just set it aside and save it for reassembly.

  5. How to clean and maintain your Briggs and Stratton 675 Series Carburetor: step 5, image 1 of 1
    • Use a socket wrench with a ½" hex bit to remove 11mm screw on the bottom of the tank.

  6. How to clean and maintain your Briggs and Stratton 675 Series Carburetor: step 6, image 1 of 2 How to clean and maintain your Briggs and Stratton 675 Series Carburetor: step 6, image 2 of 2
    • Once the bolt is removed from the bottom of the carburetor tank, gently pry open the tank with a metal prying spudger until it pops off. If you do not have a spudger, a flathead screwdriver will work.

    • Completely remove the tank so you can clean it or replace it.

  7. How to clean and maintain your Briggs and Stratton 675 Series Carburetor: step 7, image 1 of 1
    • Inspect the O-ring inside the carburetor tank. If it is dry and worn out, you may need to replace the O-ring before you reassemble your device.

Conclusion

To reassemble your device, follow these instructions in reverse order.

38 other people completed this guide.

Tim Wirtz

Member since: 01/30/15

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1 Guide authored

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Cal Poly, Team 6-31, Amido Winter 2015 Member of Cal Poly, Team 6-31, Amido Winter 2015

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16 Comments

I just performed a carb tank cleaning based on your DIY and it took less than 30 minutes! The best part of the cleaning was an immediate start of my mower on the first pull. Thanks

Jerry - Reply

Nice guide. My mower was only running on choke, any other throttle setting and it would die. A quick online search indicated dirty carburetor and subsequently I found your guide. Gave everything a good clean and voila! Good as new.

Tania Miller - Reply

Slide clamp on fuel line back and pull fuel line off carb. plug line with old pen/pencil

Remove two nuts holding carb onto engine. Remove nut holding engine choke arm on top of carb. Then remove two springs and one carb adjust metal arm. Note places of attachment

spray cleaner in all brass jets, use fine wire to clean out all orifices, clean bowl attachment nut. Spray cleaner in to choke area and tip upside down and spray under the bowl needle.

drain old gas out of tank and alternatively add a in line fuel filter as well a new air filter.

clean or repl spark plug

jim steinberg - Reply

Excellent suggestions, as well.

Charlie Farrell -

yes, this is a better guide for cleaning. the other should be called "how to inspect your carb O-ring"

kevin -

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