Talked to a few repairmen and they talk about a lot of water in our gas nowadays. What we do is go down to the local marina and buy our mower gas there as there does not seem to be any alcohol and minimal water in it, runs better in our mowers. Take a quart clear jar and fill it 1/2 to 3/4 with gas and let it set to see how much water is in your gas, you'll be surprised.