does anyone know what top speed should be with twin df 140's on a glass catamaran that weighs about 4400 lbs. i'm only getting about 28 knots at 4800 rpm. would it be my prop pitch. wot i can't even get up to 5500 rpm. and does any know how much gallons per hour i should be burning with these...
how do i know what pitch blades do i have? and how do i know which pitch blades are best suited for my boat? my boat is 25' glass catamaran and weighs 4200lbs. if that information helps...i also have twin suzuki DF140's.
