What props for 1987 270 Sundancer with twin 165?

[ancarol8]

For owners of a SeaRay equal to mine, I wonder what propellers are installed on their boat and what performance she has (maximum and cruising speed).
My boat has a propeller 14.5 x19 R/L, but do not go well. Too hard.
Please replay. Thank you.
Antonio Alberto from Italy.