I realize this is a two part question but, I am looking a purchasing a Lund Fiherman 17' - it can take upto a 150hp and I don't want to underpower it, so I will be puting on a 150hp.<br /><br />The Mercury does not come in a 150 4 stroke, so I am looking at the Optimx 150 or the Yamaha 4 stroke...