as it was explained to me the 14deg mv was designed for a 200-225hp single with a 17p prop...i'm spinning a 17p on my 200hpdi and it's ok... I wish i could get a 16, and i think a 15 is just too little. 17 is good enough.
im not sure youd get the necessary revs with a 19p, but you might depending on how you gear your boat