I have a Murray 17 HP IC Twin model 42A707 code:9609205B Type: 165301 and it ran fine one day after we cleaned the carb out. Then ran it the next day to mow the yard and it started running rough, sputtered then died and cannot start it back up until it cools down then the same over again. Any suggestion on what this might be? The battery is new and the plugs are getting fire.