performance on my 20 footer

[SEAFARI]

ROLAND,
THAT WOULD BE THE CORRECT SPEED FOR A 23' HULL. I
AM RUNNING A 200 YAM PRO-V ON A 20' HULL AND GETTING 55 MPH TURNING A 21" PRO SERIES PROP AT
5700-5800 RPM. IF YOUR ONLY GETTING 45 MPH WITH
THAT PROP YOUR TURNING ONLY ABOUT 4500 RPM. IT SOUNDS LIKE YOUR MOTOR IS LOOSING 1200 RPM? YOU
MIGHT WANT TO HAVE A MECHANIC CHECK THE MOTOR OUT.
WHAT YEAR IS YOUR BOAT? AND HOW DOES IT SIT IN THE STERN WITH THAT 225?

CHRIS