Glad it cleared, however it's just going to do it again at the worst possible time. It sucks but I would drain and remove the tank and boil it out. I used Marine Clean from por 15. I heated the tank on a coleman stove with the solution inside, rolled it around the yard a while and repeated. Also use a fish wire to ream out the pickup tube, when you think its clean spray some brake parts cleaner down the tube and look into the tank, if it is still coming out brown you have more work to do. I spent a whole day on each tank before they were clean. I also deleted the right hand tank, even though I cleaned it. I removed the hose under the tank and plugged both the tank and crossover tube on both sides. I am only using the drivers side tank which is more than enough fuel for any trip.