Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hello, and thank you for choosing Just Answer. My name is Donald. I will be happy to assist you. You stated that you put more oil in. Did you check your oil level afterwards, to see if your oil level is too high? Also, have you checked to see if your oil smell like gas is mixed in with it?
If the condition of your oil, and your oil level is ok, I would check the breather assembly next. It has a one way check valve that could be sticking, or blocked.
If your breather assembly is ok, you could have a blown head gasket, worn piston rings, worn valve guides, etc. You will need to perform a leak down, in order to be exact. We can continue from here. Thanks!