Over the past few days one of my toilets had been giving me a bit of trouble.
Normally I could just push the handle down and let go. The flap would stay up until the tank was empty and I would get a complete flush.
Recently I found that the flap was dropping down too soon (almost immediately) so the toilet wouldn't flush. I had to hold the handle down for a little while so the flap would stay up and give me a full flush - not the whole time it took to empty the tank, but longer than just a single "push and let go."
This morning I shortened the plastic chain by a couple of links and it's back to flushing with a quick push of the handle.
I checked the plastic rod from the handle - it's straight and tight - and the handle isn't tilted in any way. As far as I can tell nothing has changed in the many years since the guts were installed, yet for some reason I had to shorten the chain to get the flap to stay up.
Any thoughts?