how do i mend it so it will flush?

darrens answer is vague. who knows what a syphon is.
take the top off to see what is going on. make sure the
plug is staying open long enough to allow complete
entry of the water into flush , replacing a handle does nothing to effect internal operation. try holding handle
down until flush is complete ,all the water should empty
into outlet. to fix a problem you must observe the operation of the unit, and then determine what is needed
to remedy it.

jo dude
April 2006

Replace the syphon

Darren
April 2006