Yamaha - M/T Series Saltwater II Propeller - 3 Blade - 15-1/4 x 19 Pitch - LH Rotation - 6CF-45970-20-00. This stainless-steel, three-blade propeller is designed for today's larger offshore boats. It provides longer cruising range, superior midrange fuel efficiency and better handling in rough seas. Features a new SDS design that requires no special hardware to function.. 6CF-45970-20-00 - SWS2 W/SDS (3X15-1/4 X19 -TL)