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How can i fix my briggs and stratton 470 engine?

When the engine is running there is blue smoke and oil coming out of the exhaust.Is this indicating a blown head casket? The lawn mower is a Mountfield Sp470 with a Briggs and stratton engine.
Woody, August 2009
I doubt if there is a head gasket problem.....check: is the oil level over full, or has the machine been tipped on its side recently?

John, August 2009
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