The OSN has a swept blade design with a narrow tip. it is an OEM equivalent for newer style Viper OMC SST. It is available in 3 and 4 blades. The four blade typically provides better overall performance.
Thru Hub Exhaust
13 Tooth Spline
Rubber Hub Bushing Included
40,50,60,75,90,115,130 HP (E-TEC) 2004 and Newer
85 HP 1969-80 & 1991-95
88 HP 1981-96
90 HP 1981 & Newer
100 HP 1979-80 & 1988-93
110 HP 1986-89
112 HP 1994-96
115 HP 1973 & Newer
120 HP 1986-94
125 HP 1971-72
135 HP 1973-76
140 HP 1977-94