Hi Tom and Welcome to The Plumbing Page at AMHD.com. You're responding to a 7 year old dead threads so I gave you one of your own. Please check the date before you post.
Thanks
Remove the top part of the flush valve and remove the washer. Turn it over and seat it back in firmly, Before you reassemble place a pan over the top and turn the water back on to flush out the supply. Reassemble and give it as flush.