Those of you who actually enjoy mowing your lawn probably also have the skills it takes to maintain the lawn mower engine. Periodically, you will be required to maintain the carburetor of a Briggs & Stratton 67 series carburetor. Doing the maintenance work involves removing the air filter and carburetor tank. The task is said to be “moderately” difficult, requires about 15 to 30 minutes to perform and can be done in seven steps.
Tools you will need to perform the job include:
• Socket wrench with a 5/16” and ½” hex bit
• Flathead #4 screwdriver
• Prying tool
• O-ring
A new O-ring may be necessary because there is a good chance that the O-ring in your lawn mower is old and may be worn.
Also, keep in mind that cleaning the carburetor can be messy. So it is advised that you do it outdoors to avoid staining the floor of your garage with oil.
As mentioned, there are seven steps to cleaning the carburetor. They include:
Before performing the work, be certain that the engine is off and the spark plug wire is removed and some distance from the spark plug to assure an accidental sparking of the plug.
1. Use the Flathead screwdriver to remove the 40mm screw that secures the air filter case on to the Briggs & Stratton 67 series carburetor.
2. Use your hands to pull the air filter case out of the hinge located at the bottom of the Briggs & Stratton 67 series carburetor.
3. Remove the three 20mm bolts behind the air filter using the socket wrench with a 5/16-inch hex bit. Remove the plastic backing to the air filter to expose the Briggs & Stratton 67 series carburetor.
4. Set the plastic washer that comes off of the backing to the side and save for reassembly.
5. Use the socket wrench with a ½-inch hex bit to remove the 11mm screw and bolt on the bottom of the Briggs & Stratton 67 series carburetor tank.
6. Carefully pry open the tank of the Briggs & Stratton 67 series carburetor using the flathead screwdriver and remove it and then clean it. If you notice wear, then you will have to replace it.
7. Inspect the O-ring inside the carburetor tank. If it is dry and worn, then you will have to replace the O-ring before reassembling the Briggs & Stratton 67 series carburetor.
Clean all the components and reassemble following these instructions in reverse order.
(Source: Ifixit)
