"Mercury Marine Outboard One Piece Propellers 9 1/2"" X 11"" 9"" Black Diamond . Mercury Outboards Daiameter x Pitch Material Balde Model Mercu# 2.5hp 1990 & up, 3.3hp 1993 & up, 3hp 1990-92 7 3/8"" x 6"" AL 3 5037700 QA3180 4-6hp, 4-5hp 2-stroke 1987 & up, 4-stroke 1999 & up 8 3/8"" x 7"" AL 3 5037726 QA3182R 8 3/8"" x 8"" AL 3 5037734 Q...