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
15 Tooth Spline
Rubber Hub Bushing Included
40,50,60HP (Big Foot, 4-stroke All Years)
60HP (Sea Pro/Marathon) 95 & Newer
70HP 87- 89
75HP(2&4-stroke) 84 & Newer
80HP 78-89
90HP (2&4-stroke) 78 & Newer
100HP 88 & Newer
115HP 78 & Newer
115HP (4-stroke) 01 & Newer
125HP 94 & Newer
140HP (Includes Sea Pro & Offshore) 78-81