Boat Outboard Propeller Spec:Diameter-14,Pitch-19,Rotation-Right,4-Blade Aluminum Propeller,Replaces Part NO.#48-8M0084495. Pls kindly check your mercruiser alpha one propeller etc with the correct diameter/pitch/rotation/OEM NO#/engine year/ HP,make sure choose exactly propeller in need.,High quality: Our 14"x 19" pitch outboard speed propeller for mercruiser alpha one is made by heavy duty corrosion-proof aluminum make sure solid construction,heat-treated paddle blade has high toughness and durability.Boat moves smoothly and quickly,Function:Replaces original damaged 19 pitch Mercury/Mercruiser Alpha&Bravo I Stern-Drives propeller,lower fuel consumption and accelerate faster,reduce the wear and tear on engine,increase the top speed of your boat.,Easy Install:Just remove prop locknut&locknut retainer& forward thrust washer.Then Install forward thrust washer---Insert drive sleeve into prop---Slide prop on prop shaft---Insert drive sleeve adapter--Slide locknut retainer---Install prop locknut---Insert sth to prevent spinning--Tighten prop locknut(NOTICE: The Boat Propeller NOT Includes Flo-Torque hub kit),Fitment:perfect 4 blade boat propeller replacement for 14x19pitch Mercury Engines 135 150 175 200 220 225 250 300HP 2& 4-Stroke outboards AND Mercruiser Alpha&Bravo I Stern-Drives,detail information pls see below