I know prop is an American S/Steel (not sure the brand). Got the boat back from dealer after engine service and fitting Minn Kota and upgrading electronics. Will write down prop details in the morning and post. Very much appreciate your interest and invaluable advice. I have spent a lot of time (a lifetime) on boats without having a detailed understanding of propping on big outboards. Know sh!t load about catching fish but =)
Kev