my boat is a alum 14' deep v tiller weighing about 800 lbs with me and gear.
current prop is 9" x 9p ,motor is 15 hp 4 stroke 2007 mercury long shaft rated @ 5500 wot rpm (note on motor)
installed a tach at wot i'm at 5900 rpm and 20.5 mph
any advice on what prop I should be using ,before I blow...