I have a 1964 16' Lakeflite V hull runabout. I just got a 1969 Mercury 650 that is in near pristine condition. Only problem is, I need a prop. The boat weighs around 900 lb. add another 200 for the Merc 650. What diameter / pitch prop would be good starting recommendations? I was thinking of a 13 x 19p 3 blade, but was wondering if it may be too much pitch for a 650. Any suggestions would be appreciated. Thanks!!