I have a low flush toilet that has a problem. When you flush it instead of pushing the handle down and walking away you have to stand there and wait for the water to drain. I took the tank top off and looked in side. This is the kind of toilet that has the floater that is a cylinder on the input water supply shaft that rises as the water enters the tank. This is on the left as you look in the toilet. The handle is connected via a steel chain to the flapper which is on the overflow pipe.
When I push the handle down it pulls up the flapper however if I let go of the handle the flapper falls back down over the flush valve seat. I tried replacing the flapper but to no avail?