The boat is a 16' Princecraft Starfish tiller, I added my own floors. I carry the regular downrigging stuff, FF, radio, etc. Since there was no listing for recommended props for my boat, the dealer started me off with a 10 3/4 x 17P, far too much pitch. I went down one size to a 10 3/4 x 16P, was a tiny bit better. Finally went to an 11 1/8 x 13P and it's not at max listed rpm yet. I can get down to about 2mph with 2 people in the boat although I may buy a spare and go one size further down yet to 11 5/8 x 11P for when I'm alone downrigging. With the present prop I hit about 40 km/h when there's a ripple on the water, I don't like beating the boat in the waves.
http://yamahaoutboards.com/sites/default/files/pdfs/Four-Stroke-F60-T25.pdf