K-87115 arm of lever blocked by top

[Tduke]

I installed the Kohler 87115 but when flushing it, the arm of the lever exceeds the height of bowl and with the top cover on it- the cover prevents it from being able to flush. Can anyone help advise what can be done?See here

 

[Terry]

The chain linkage needs to be adjusted. There should be very little slack between the flapper and the trip lever rod.