I CAN START MY TROY-BILT 21" LAWN MOWER BY PUMPING THE GAS - BUT AFTER SOME 5 SECONDS THE ENGINE CUTS. I HAVE CHANGED THE FILTER AND TRIED WITH AND WITHOUT CHOKE - BUT THE SAME SEEMS TO OCCUR - THE ENGINE RUNS FOR 5 SECONDS AND THEN QUITS. ANY IDEAS WOULD BE USEFUL - OR IF YOU KNOW A REASONABLE REPAIR PLACE IN THE VICINITY OF MD 21131 (NORTH BALTIMORE COUNTY) I WOULD CONSIDER TAKING IT FOR REPAIR. MANY THANKS FOR YOUR INPUT.