Mercury 60hp command thrust prop

i know they are a bit pricey but i have found the trophys to push them flats very well.. my dad has an 18 foot xpress with a 60 tiller and a trophy 4 blade ss prop and it moves that boat like a raped ape! it is a mod v tho fowlers i think are all flat but im not sure with one that old! id speculate you would do well with a 15 maybe a 16 pitch prop.. the four blades will give you extra lift for hauling, also remember your rpms will drastically change with a full load of decoys and a couple guys