I've spent the weekend replacing all the parts in my 20 year old toilet tank and I can't get a full flush. The lift rod has about 3 inches of upward movement when I push it and this is not enough to pull the rubber flapper all the way up so that it stays up through a full flush.
This is a small toilet and I have the fill tube positioned as close to the water control assembly as possible.
Should I be using a different type of overflow tube and flapper? How can I get a full flush?