Small Engines (Lawn Mowers, etc.): oil coming out of the exhaust, briggs stratton, mountfield

Question
hi i have a mountfield briggs & stratton engined lawn mower 35 classic.when i start the mower up oil floods out of the exhaust causing very bad smoke.the mower is 2yrs old.somebody said that it could be running to rich that it might need the mixture screw ajusting.i don't evevn know where the mixture screw is if it has one.thanks

Answer
Is your oil level too high?  Does the oil smell like gasoline?  Are you using SAE-30 oil?  Has the oil recently been changed?

Go ahead and remove the spark plug.  Pull the string several time with the plug removed and see if any oil comes out the spark plug hole.

Let me know the answers to the above questions.
Eric