hey guys. 1986 Sundancer 250 with 5.7 alpha gen 1 1.47 ratio. i currently have a 14.5x17 aluminum prop on it. last year i could get to about 4000 RPM WOT and about 33-34 MPH (GPS) with 2 people and a 'normal' load of fuel and water. overall i'm ok with the performance but the RPMs are a little low. i also have a SS prop that the PO said is also a 14.5x17. the numbers on it are 48-88438A-4-17P, which looks like it is a 15 3/4 x 17? my main objective would be better fuel economy of the two. i would rarely ever see full throttle and i can plane out at about 2500 RPM at 23 MPH with the aluminum prop but that is barely on plane and should be considered as the minimum. i feel better at about 2700 and 25MPH.
another concern is the electrolysis with the SS prop. i boat on the ohio river and the boat is in the water for about 5 months.
so is it worth changing out to the SS prop? what differences will i see? most of my cruising will likely be at close to no wake speed. wife likes to cruise and sight see. but on plane occasionally and not concerned with top speed or WOT as long as i'm not lugging it
another concern is the electrolysis with the SS prop. i boat on the ohio river and the boat is in the water for about 5 months.
so is it worth changing out to the SS prop? what differences will i see? most of my cruising will likely be at close to no wake speed. wife likes to cruise and sight see. but on plane occasionally and not concerned with top speed or WOT as long as i'm not lugging it