sent the 17 back for a 19 and also bought a 21 will see the results , the prop that came on the boat was a 14.5x 19 ,, i ordered a 14.125x19 and a 14.125x21 ,, these blades on these turning point prop are twice the thickness of the one i took off ,, also weight a lot less they also have holes in the hub for the water to escape ,, they are not supposed to flex like aluminum,, so im thinkin between the 2 , it should give what i want ,, thanks for all the input guys