Yamaha - M/T Series Saltwater II Propeller - 3 Blade - 15-1/2" x 17 Pitch - LH Rotation - 6CF-45978-20-00. M or T Series Propellers for 4.75" Gearcases are designed for use with Yamaha models 150-300 and F150-F300 (V6) and includes a variety of boat propellers including performance 3 Stainless Steel propellers, M/T Series FXP Stainless Steel Props, and lightweight Aluminum Propellers.. Features:. This stainless-steel, three-blade propeller is designed for today's larger offshore boats. It provides a longer cruising range, superior midrange fuel efficiency, and better handling in rough seas. A new SDS design that requires no special hardware to function.. 6CF-45978-20-00 - SWS2 W/SDS (3X15-1/2 X17 -TL)