Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Is the oil level over full or smell of gas in the oil? For oil to get into the carburetor, it would have to come through the breather pipe from the engine crankcase breather. Did engine continue to run after you cleaned the carburetor bowl? If not , i would do a complete cleaning of the carburetor and check the air filter , to see if it could be saturated with oil.