Last year I changed my engine from a Kelvin P4 to a Perkins D3. My counter was always in the water by some way and I never suffered cavitation at all. The D3 is obviously lighter and although the counter was still in the water, the cavitation noise was really evident
I added some extra ballast (it's now deeper than ever) and things have improved, however sometimes it returns, when the only thing that will stop it is to slow down
I get the feeling that it is shallow canals that give me a problem.
Has anyone found it to be depth dependent?
I am probably spinning the prop faster, but a recent prop calc showing that I am not far off optimum.
Can I be too deep, could that cause it?
Any ideas folks?