What additives are in your gas when you buy it at the pump? Whatever it has, it's attracting a lot of water and I think it's amazing that the pump lasted as long as it did. I would recommend taking a fuel sample before running it again. If you find water, remove it from the gas. If you see a milky layer in the gas, remove ALL of the gas- this milky layer is due to "phase separation" and not only does it not burn well, it doesn't pass through the filter as well as clean gas (assuming the 5 micron filter element is on the pump).