Re: 1966 starcraft
Here's a link to the old merc site "Mercury Prop Chart"
http://www.maxrules.com/oldmercs/Propellers/Props/9.pdf
This page has the Merc 450 through the Merc 700. It gives a speed range for engine, boat weight, boat length, and . The 500 and 650 are both on there too.
My 66' Nassau w/ 1967 Merc ss 650 is running a 12 1/2" - 15 pitch prop (prop# A-48-37900A2). The Starcraft brochure said the boat is 500 pounds w/ a 1300 pound capacity, the motor should weigh around 250 I would think.
I had my boat out for the first ime last fall, no speedometer, but man, did it fly! It originally had a 75hp Evinrude on the back that thing was huge!
It looks like your making lots of progress. The boat looks great! Keep up the good work.
You'll be on the water soon by the looks of it.