My old prop is marked 9 7/8x13 F, one prop listing makes mention that when changing from a flat prop to a cupped model reduce pitch by 2". Is the "F" mark refering to flat? One catalog lists several different pitches but are 10 1/4" while another shows 10 1/8". <br /><br />Boat is 16' Alu with 48" bottom, interior decking is done with .080 and .030 Alu sheet not plywood, livewell, t-motor, console steering.
