How low should the prop sit

[greasy1025]

how low should the prop sit be

how low should the prop sit below the bottom of the boat?

 

[jwbmarine]

"what boat,what eng?...
a gen

"what boat,what eng?...
a general rule of thumb,..is the cavitation plate,should be even with,to 1" above bottom of boat......this would be a good rule,for small engines."