Originally Posted by chorscroft
And what about repropping the boat - how many knots do you think I could squeeze out of it then?
Is it impossible to tell without being out and reading the rev. counter?
In general terms, you can't get more speed out of a boat by a simple prop change unless the current props are a mismatch. It is sometimes possible to realise a gain by a change of prop style but there is usually a compromise somewhere in the boat's performance. Speed isn't everything, especially in a boat like a Redbay because they are built to perform well in other circumstances.
The bottom line is that the 8.5mtr Redbay has a particular hull type and weight, you're driving it with about 280HP through two drives so your speed is going to be in the low to mid 30's.