Yamaha - M/T Series Saltwater HS4 Propeller - 4 Blade - 15" x 21 Pitch - LH Rotation - 6CF-45B70-20-00. 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, four-blade propeller provides excellent acceleration, quick planing, and max grip, while resisting ventilation in rough or following seas on V6-powered boats. An updated SDS design that requires no special hardware to function.. 6CF-45B70-20-00 - PROPELLER (4X15 X21 -TL)