This This sounds like a carbureture problem. There is dirt in the carb causing the float to stay open and flood the carb with gas. This is a dangerous situation and the mower should not be started when this is happening. IF you are handy with tools and know something about carbs you can fix this yourself. Otherwise take it to a professional.
Source(s):30 years experience repairing small equipmentA lawn mower may leak gas from the air filter due to a carburetor issue, such as a stuck float or needle valve. This can cause excess fuel to flow into the air filter, leading to leakage. It is important to address this issue promptly to prevent potential safety hazards and damage to the lawn mower.
To prevent oil leakage and engine damage when tipping a lawn mower, make sure to tip it with the air filter and carburetor facing up. This will help prevent oil from leaking out of the engine and potentially causing damage.
The air filter assembly is usually attached to it.
The air filter is usually located inside the canister that is bolted to the carburetor.
under a plastic cover, next to the carb,
Most likely revving due to a dirty/clogged air filter.
make sure the gas valve is turned on and you put the air filter in right
Most use the B&S# 491588
Front of the engine screwed to the carburetor
Your lawn mower may be surging due to a dirty air filter, clogged fuel filter, or old spark plug. To fix it, try cleaning or replacing the air filter, fuel filter, and spark plug. You can also check the carburetor for any issues and adjust the throttle and choke settings.
Remove the air filter caseing disconenct the fuel pipe remove the bolts which hold the carb in place. L Davidson lawn mower tech
If you have fuel coming out of your air filter, then your carburetor bowl float is most likely gummed up an stuck. try tapping on the bowl, or you my need to take it off an clean it and the needle jet. How do you adjust air/fuel mix on a lawn mower motor?