Toilet Flushing Control Advice Required

[polomints]

When I flush the loo I get a slight leak on the plastic body, I have attached a photo of the unit.
Is the yellow attachment a pipe ? and how does it operate the two flush functions.
I of course wish to stop the leak I have not tried yet taking it apart until you good guys can impart your wisdom, thanks in advance.

 

[Madrab]

That looks like a standard cable operated flush, one button presses the clip inside more than the other, short for short flush long for full flush if I remember rightly.

It leaks from the white plastic body? May be a vacuum but they're usually round.

 

[polomints]

That looks like a standard cable operated flush, one button presses the clip inside more than the other, short for short flush long for full flush if I remember rightly.

It leaks from the white plastic body? May be a vacuum but they're usually round.

Thanks for reply, yes on each operation the plastic body becomes wet after it drys it remains ok until next use.
You refer to vacuum what is that please.

 

[dilalio]

Can you take another photo of the whole setup showing where the button is actually located in relation to the cistern?

 

[polomints]

Can you take another photo of the whole setup showing where the button is actually located in relation to the cistern?

Yes please find attached

Can you take another photo of the whole setup showing where the button is actually located in relation to the cistern?

 

[dilalio]

OK. Looks like the water level is too high in the cistern. You need to adjust the float on the inlet valve so that the level is lower when full. Also, the front of the cistern opening should have a cover that clips in to prevent spray from the cistern filling.
I would guess that water is being syphoned down the yellow tube when you flush.
Can you see it happen when you operate it with it all exposed like that?