I drained the tank and put if fresh gas before I tried it the first time. The tank didn't look too bad. Of course that didn't do anything about the old gas still in the carbs. My friend thinks the fresh gas and running it the day before shook loose crud in the carbs that plugged them. I will check the filter and pump. I may rig a direct gravity feed to bypass the tank, valve, filter, and pump and see if that makes any difference.