Originally Posted by 669dennis
I was thinking of black max 19p aluminium low speed towing and water sports, but not sure about higher speed thinking 23p? I have the 21 quicksilver aluminium it seems like a good midrange,but not good for water sports just ok..
so give me a good 19p and 23p in aluminm.
For towing and water sports if you plan on staying with aluminum then I would go with a 4 blade prop. Quicksilver Diamond 4, Turning Point Legacy, Solas 4 blade. Until you figure out why your turning 4700 rpm but not getting a top speed over 40 I wouldn't do anything because a higher pitched prop will drop your rpm's.
Answer the questions in the post above and we'll try and help more but we need more information.
When your doing your top speed run are you trimmed up from full down position to optimize your speed?
Are your speed calculations from a GPS unit or from the speedometer?
How much weight in people and gear were on your boat when you did the top speed run?
And finally, I would verifiy your top end speed with 2 adults and a half tank of fuel. Start trimmed down and go WOT until your at top speed (verified with a gps) then trim up in small increments. You will be able to see your speed go up as you do this. When your speed stops increasing then trim back down a little bit and record the rpm's and your top speed.