Small Engines (Lawn Mowers, etc.): Briggs & Strattan small gasoline engine, gasoline engine, weed eater

Question
I accidentally puat gas mixed with oil (for the gas powered weed eater) in my Craftsmen mower.  Is the engine ruined?

Answer
ELIZABETH, MY GOODNESS GAL...NO MOW AS YOU WOULD.  WHEN DONE WITH THE FRONT YARD ADD SOME FRESH GAS.  AND MOW THE BACK.  THE MOWER IS GONNA SMOKE LIKE AN OLD BEATLE'S MOVIE BUT NOTHING SHOULD BE HURT.  IT YOU WANT YOU CAN DRAIN OR EMPTY AS MUCH AS YOU CAN OF THE MIXED GAS BUT THIS IS REALLY MESSY.  THIS WAS YA CAN KILL A FEW MOSQUITOS WHILST YA MOW.   HA...HA...HA..

GEORGE