Small Engines (Lawn Mowers, etc.): MOWER,NOT STAYING RUNNING AFTER 10 MIN., fuel tank cap, vent

Question
MY MOWER AFTER RUNNINING FINE FOR ABOUT 10 MIN,JUST QUITS.can you help me.

Answer
First, try loosening the fuel tank cap slightly.  If this prevents it from quitting, the tank vent in the cap is plugged and will need to be cleared or the cap replaced.  If this is not the issue, you need to verify that it still has spark after it quits.  If it has no spark, you will have to correct that.  If it has spark, you need to rotate the engine over slowly and listen for a whisping sound from the exhaust.  This would indicate a leaking valve that would need to be corrected.   Hope this helps.