I have an MTD Yard Machine Push Mower, model 11A-B96N729 DOM 2013 21" cut 190cc Briggs and Straton 675 series. It will not start, New Carb, New Plug gapped to .20" new air filter, fresh gas, cleaned out gas tank. Tested the plug and yes it has spark.Plug does look wet when pulling it out. Auto Choke seems to be free and easy, When pull the rope the motor does turn to creat the spark so don't think it is the ket? What else could it be?