Floating Object does not react correctly

[lolliver]

I tried to make a buoy i modeled float with an ocean.
It reacts to the wave motion but the locator is very big and always either to much above the ocean or under it .
I tried working with the extra Atributes (scene scale)
but nothing seems to fix my problem.
Does anybody know whats wrong?
Thank you foe any help

[duncanbrinsmead]

On the extra attribute under the locator shape try increasing the water damp value.

Duncan