Hello,
I had this long detailed message and it vanished.
I am from Lake St Clair in Michigan.
I was browsing the internet for propeller help with my 2002 SeaRay 290 Sun Sport. I saw that a dealer in upstate NY had a list of "best fit" propellers for searays similar to mine and was wondering if you guys could suggest a best overall propeller for my boat.
The boat is a 2002 Sea Ray Sun Sport with twin 350 mag / bravo 1 / (regular) mirage 14.75 x 21 p propellers.
I've owned the boat for 2 seasons. It seems to cavitate more than I would expect coming up on plane.
Top gps speed yesterday is 48mph at 4800 RPM, 4000 / 40mph 3200 / 30mph and doesn't slip,so it seems to run well once on plane.
I have a little vibration that I think could be propeller related.
Either way, I have been planning on replacing the propellers.
If you gys can and would help, I would really appreciate any help with prop selection. I am not out trying to race anyone or anything like that, but would like a good performing boat both bottom end and top.
Please and thank you for any suggestions that you might have.

Mercury prop selector: (based on 21p/4800/48mph - Express cruiser/ B1 1.5 ratio (guessed)

Thank you for that information. I am asking which of those propellers would someone with a little more knowledge than me select. What are the advantages and disadvantages of four blades, etc.

easy read...

https://www.boattest.com/view-news/3...es-or-3-blades