I have a Scag with the 26hp B&S. Its just the Freedom Z so not the commercial mower. I love the mower but it has recently developed a problem. It would not start, it acted like it wasnt getting fuel so cleaned the carb and all was good. Also put new filter on while I was at it. Went to cut again and it did it again. Cleaned carb it was fine again. Went to cut again and it did the same thing. It runs fine and starts fine after the carb clean but after it sits a day or two it wont crank. It has been to the dealer and they just cleaned the carb. It has fresh gas and was doing this before this gas. I have got 2 new filters I am going to put on and hopefully help catch any debri. I am getting tired of taking it apart every time I need to cut grass. What is causing this and how can I stop it?