I have a Exmark with 23hp Kaw LC. It has been a great mower and I love the cut but it is down in the heat of this growing season. I need help troubleshooting! (When I last used it) It was running good and then it started to spurt like it was out of gas and then shut off. It turns over but will not crank! I replaced the fuel pump and filter, plugs, and oil change. Can anyone help me with this problem? I am pretty sure it is not the alt. or starter. I believe it may be in the firing system! Has anyone else had this happen and what was it? ANy suggestions THanks!!!!!!