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How can I fix my mower that starts but won"t run?

I have a briggs and stratton motor on my lawn mower. When I prime the motor it stars right up but will not run. I have changed the spark plug checked that the carb is getting clean fuel and cleaned the carb and air filter.I am stumped . Can you help?
Thank you

Mark81859
May 2012

Briggs & Stratton Garden Tools, Lawn Mowers Mower That Starts Run

Thank you very much for taking the time to answer my question. Your help is greatly appreciated.

Mark81859
May 2012

Most likely needs a new diaphragm. It acts as a fuel pump. If it's holed, or work-hardened, it will explain your symptoms.

Phil Saunders
May 2012

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How can I fix my mower that starts but won"t run?

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