Small Engines (Lawn Mowers, etc.): CRAFTSMAN RIDING MOWER WONT STAY RUNNING, vacuum line, diaphrams

Question
I HAVE A CRAFTSMAN MOWER THAT RUNS OK IF YOU DUMP GAS DOWN CARB. THROAT. IT HAS SOME KIND OF PUMP KIT BUILT INTO THE CARB. THAT WONT ALLOW GAS FLOW INTO CARB.THERES NO ELECTRICAL WIRES GOING TO IT BUT THERE IS A VACUUM LINE AND THE FUEL FEED LINE CONNECTED TO IT. I OPENED UP THE PUMP AND ALL THE DIAPHRAMS AND PARTS LOOKED LIKE NEW. CAN YOU TELL ME AM I SUPPOSED TO CHECK THE VACUUM LINE. THE MODEL IS 917.270940  THANK YOU ANY HELP WOULD BE APPRECIATED.

Answer
 Hello Jim:

 From your Description I Suggest you Clean and Rebuild the Carburator. If the Engine has Compression and Runs as you Described, then the Vaccum isnt the Problem. Hope this Helps. Let me know what Happens, Please. Thanks.

 Good Luck

 Respectfully

 John