Fuel primer in Briggs & Stratton lawn mower engine is a small, hand-operated pump used to prime the engine with fuel. It is usually located near the fuel tank and carburetor, and is used when the engine is cold or has been sitting for a while.
- To use the fuel primer, simply press down on the plunger several times until you feel resistance. This will pump fuel into the carburetor, which will then mix with air and travel to the engine's cylinders.
Once the engine is primed, you can then start it by pulling on the starter cord or turning the key in the ignition.
Here are some of the reasons why a fuel primer may not be working:
- The primer is not properly sealed: If the primer is not properly sealed, it can allow air to leak in, which will prevent it from creating a vacuum and drawing fuel into the carburetor. To check for a seal leak, look for cracks or damage to the primer housing or gasket.
- The primer diaphragm is damaged: The diaphragm inside the primer is what actually creates the suction to draw fuel into the carburetor. If the diaphragm is damaged or torn, it will not be able to create enough suction and the primer will not work properly. To check for a damaged diaphragm, remove the primer housing and inspect the diaphragm for any signs of damage.
- The primer check valve is stuck: The primer check valve is a small valve that prevents fuel from flowing back into the fuel tank. If the check valve is stuck, it can prevent the primer from drawing fuel into the carburetor. To check for a stuck check valve, remove the primer housing and inspect the check valve for any debris or damage.
