3 Blade vs 4 blade prop and rotation change

I have a 1990 350 Searay Sundancer. I have trouble sometimes with cavitation and overall performance in large waves on Lake Erie. The boat has two bravo one stern drives with three blade ss mirage props, 15.25 x 19. My drives are counter rotating; portside turns LH and starboard turns RH. I had a mercury rep tell me to try to go to ss four blade props and changing the linkage on my motors so my rotation would be opposite; portside would be RH and starboard would be LH. He said they found out on larger boats my side they got better performance. What do you guys think about this and what type of ss prop and what size would I go to. Also, what do you think about this rotation change.

Thanks,
Scott

Re: 3 Blade vs 4 blade prop and rotation change

You may get more answers if you post your question on the Clubsearay forum. Haven't seen a whole lot of posters here on Iboats with experience in big twins.

http://clubsearay.com/forum/index.php

Re: 3 Blade vs 4 blade prop and rotation change

Thanks I will do that