Went to the shop this morning and started with a gas line to a gas can, nothing! Then pulled the pump , worked it by hand pump seemed to work ? removed the gasket tryed it again nothing! Thinking the cam may be worn but the thing pumped fine a day ago? Pulled the pump again this time I left both lines connected and tried to pump it by hand and suprise it didn't pump!! Finally I pulled the line off the carb,turned it over and it pumped gas!!! took carb apart freed up the stuck slide put it back together and started right up. Great feeling to figure it out!